diff --git a/cells/a2111o/sky130_fd_sc_hd__a2111o_1.spice b/cells/a2111o/sky130_fd_sc_hd__a2111o_1.spice
index 8a18ce5..50e1437 100644
--- a/cells/a2111o/sky130_fd_sc_hd__a2111o_1.spice
+++ b/cells/a2111o/sky130_fd_sc_hd__a2111o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111o_1 A1 A2 B1 C1 D1 VGND VNB VPB VPWR X
 M1000 VPWR a_85_193# X VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_85_193# D1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2111o/sky130_fd_sc_hd__a2111o_2.spice b/cells/a2111o/sky130_fd_sc_hd__a2111o_2.spice
index 839d95c..8894fba 100644
--- a/cells/a2111o/sky130_fd_sc_hd__a2111o_2.spice
+++ b/cells/a2111o/sky130_fd_sc_hd__a2111o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111o_2 A1 A2 B1 C1 D1 VGND VNB VPB VPWR X
 M1000 VPWR A1 a_607_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_715_47# A1 a_86_235# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2111o/sky130_fd_sc_hd__a2111o_4.spice b/cells/a2111o/sky130_fd_sc_hd__a2111o_4.spice
index caf253a..9d63158 100644
--- a/cells/a2111o/sky130_fd_sc_hd__a2111o_4.spice
+++ b/cells/a2111o/sky130_fd_sc_hd__a2111o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111o_4 A1 A2 B1 C1 D1 VGND VNB VPB VPWR X
 M1000 VGND D1 a_44_47# VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 X a_44_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_0.spice b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_0.spice
index 9e4755e..e3216a4 100644
--- a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_0.spice
+++ b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111oi_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111oi_0 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 Y B1 VGND VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A1 a_313_369# VPB phighvt w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_1.spice b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_1.spice
index e52eb8e..34c16b5 100644
--- a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_1.spice
+++ b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111oi_1 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 VGND C1 Y VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A2 a_568_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_2.spice b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_2.spice
index bdec8f3..2ce8db1 100644
--- a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_2.spice
+++ b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111oi_2 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 a_684_47# A1 Y VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND A2 a_684_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_4.spice b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_4.spice
index 8be6b3c..33f39f0 100644
--- a/cells/a2111oi/sky130_fd_sc_hd__a2111oi_4.spice
+++ b/cells/a2111oi/sky130_fd_sc_hd__a2111oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2111oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2111oi_4 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_821_297# VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_1205_47# A2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211o/sky130_fd_sc_hd__a211o_1.spice b/cells/a211o/sky130_fd_sc_hd__a211o_1.spice
index 7c50206..a3d266f 100644
--- a/cells/a211o/sky130_fd_sc_hd__a211o_1.spice
+++ b/cells/a211o/sky130_fd_sc_hd__a211o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a211o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a211o_1 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_472_297# B1 a_217_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A2 a_217_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211o/sky130_fd_sc_hd__a211o_2.spice b/cells/a211o/sky130_fd_sc_hd__a211o_2.spice
index fdee09a..d870d41 100644
--- a/cells/a211o/sky130_fd_sc_hd__a211o_2.spice
+++ b/cells/a211o/sky130_fd_sc_hd__a211o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a211o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a211o_2 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_79_21# C1 a_585_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_79_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211o/sky130_fd_sc_hd__a211o_4.spice b/cells/a211o/sky130_fd_sc_hd__a211o_4.spice
index 1109150..bc03642 100644
--- a/cells/a211o/sky130_fd_sc_hd__a211o_4.spice
+++ b/cells/a211o/sky130_fd_sc_hd__a211o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a211o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a211o_4 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 VPWR a_79_204# X VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_555_297# B1 a_473_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211oi/sky130_fd_sc_hd__a211oi_1.spice b/cells/a211oi/sky130_fd_sc_hd__a211oi_1.spice
index a6970b5..e500f1a 100644
--- a/cells/a211oi/sky130_fd_sc_hd__a211oi_1.spice
+++ b/cells/a211oi/sky130_fd_sc_hd__a211oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a211oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a211oi_1 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_56_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR A2 a_56_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211oi/sky130_fd_sc_hd__a211oi_2.spice b/cells/a211oi/sky130_fd_sc_hd__a211oi_2.spice
index b370498..89fcd77 100644
--- a/cells/a211oi/sky130_fd_sc_hd__a211oi_2.spice
+++ b/cells/a211oi/sky130_fd_sc_hd__a211oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a211oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a211oi_2 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_485_47# VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_37_297# C1 Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211oi/sky130_fd_sc_hd__a211oi_4.spice b/cells/a211oi/sky130_fd_sc_hd__a211oi_4.spice
index 6b31770..8ee3eb0 100644
--- a/cells/a211oi/sky130_fd_sc_hd__a211oi_4.spice
+++ b/cells/a211oi/sky130_fd_sc_hd__a211oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a211oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a211oi_4 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 VGND C1 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21bo/sky130_fd_sc_hd__a21bo_1.spice b/cells/a21bo/sky130_fd_sc_hd__a21bo_1.spice
index f3f9c95..9687035 100644
--- a/cells/a21bo/sky130_fd_sc_hd__a21bo_1.spice
+++ b/cells/a21bo/sky130_fd_sc_hd__a21bo_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21bo_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21bo_1 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 a_298_297# a_27_413# a_215_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_215_297# a_27_413# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21bo/sky130_fd_sc_hd__a21bo_2.spice b/cells/a21bo/sky130_fd_sc_hd__a21bo_2.spice
index 74ff13e..0c55bd6 100644
--- a/cells/a21bo/sky130_fd_sc_hd__a21bo_2.spice
+++ b/cells/a21bo/sky130_fd_sc_hd__a21bo_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21bo_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21bo_2 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 VGND A2 a_581_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_581_47# A1 a_79_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21bo/sky130_fd_sc_hd__a21bo_4.spice b/cells/a21bo/sky130_fd_sc_hd__a21bo_4.spice
index 187ea3e..926281d 100644
--- a/cells/a21bo/sky130_fd_sc_hd__a21bo_4.spice
+++ b/cells/a21bo/sky130_fd_sc_hd__a21bo_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21bo_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21bo_4 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 a_603_297# a_42_47# a_205_21# VPB phighvt w=1e+06u l=150000u
@@ -46,4 +61,3 @@
 M1021 VGND B1_N a_42_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=2.5025e+11p ps=2.07e+06u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hd__a21boi_0.spice b/cells/a21boi/sky130_fd_sc_hd__a21boi_0.spice
index 690225f..01d87da 100644
--- a/cells/a21boi/sky130_fd_sc_hd__a21boi_0.spice
+++ b/cells/a21boi/sky130_fd_sc_hd__a21boi_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21boi_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21boi_0 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 VGND A2 a_400_47# VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_400_47# A1 Y VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hd__a21boi_1.spice b/cells/a21boi/sky130_fd_sc_hd__a21boi_1.spice
index 1a3914f..53f226b 100644
--- a/cells/a21boi/sky130_fd_sc_hd__a21boi_1.spice
+++ b/cells/a21boi/sky130_fd_sc_hd__a21boi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21boi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21boi_1 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_300_297# A2 VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 VGND B1_N a_27_413# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.113e+11p ps=1.37e+06u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hd__a21boi_2.spice b/cells/a21boi/sky130_fd_sc_hd__a21boi_2.spice
index 34bb2fe..3cef97b 100644
--- a/cells/a21boi/sky130_fd_sc_hd__a21boi_2.spice
+++ b/cells/a21boi/sky130_fd_sc_hd__a21boi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21boi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21boi_2 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_217_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_479_47# A2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hd__a21boi_4.spice b/cells/a21boi/sky130_fd_sc_hd__a21boi_4.spice
index 4c4f7f1..d40a2fc 100644
--- a/cells/a21boi/sky130_fd_sc_hd__a21boi_4.spice
+++ b/cells/a21boi/sky130_fd_sc_hd__a21boi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21boi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21boi_4 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_223_297# a_27_47# Y VPB phighvt w=1e+06u l=150000u
@@ -54,4 +69,3 @@
 M1025 VPWR B1_N a_27_47# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=2.65e+11p ps=2.53e+06u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hd__a21o_1.spice b/cells/a21o/sky130_fd_sc_hd__a21o_1.spice
index ea79165..16dabdb 100644
--- a/cells/a21o/sky130_fd_sc_hd__a21o_1.spice
+++ b/cells/a21o/sky130_fd_sc_hd__a21o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21o_1 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VGND a_81_21# X VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_299_297# B1 a_81_21# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=2.6e+11p ps=2.52e+06u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hd__a21o_2.spice b/cells/a21o/sky130_fd_sc_hd__a21o_2.spice
index c315110..0d1fcde 100644
--- a/cells/a21o/sky130_fd_sc_hd__a21o_2.spice
+++ b/cells/a21o/sky130_fd_sc_hd__a21o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21o_2 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VPWR A1 a_386_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR a_80_199# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hd__a21o_4.spice b/cells/a21o/sky130_fd_sc_hd__a21o_4.spice
index dcc8f82..e962b8c 100644
--- a/cells/a21o/sky130_fd_sc_hd__a21o_4.spice
+++ b/cells/a21o/sky130_fd_sc_hd__a21o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21o_4 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 a_483_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_84_21# B1 a_483_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hd__a21oi_1.spice b/cells/a21oi/sky130_fd_sc_hd__a21oi_1.spice
index 4d6c051..9e998fb 100644
--- a/cells/a21oi/sky130_fd_sc_hd__a21oi_1.spice
+++ b/cells/a21oi/sky130_fd_sc_hd__a21oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21oi_1 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_113_297# A2 VPWR VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 a_199_47# A1 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hd__a21oi_2.spice b/cells/a21oi/sky130_fd_sc_hd__a21oi_2.spice
index d50c4fb..240946b 100644
--- a/cells/a21oi/sky130_fd_sc_hd__a21oi_2.spice
+++ b/cells/a21oi/sky130_fd_sc_hd__a21oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21oi_2 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_285_47# A1 Y VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 Y B1 a_27_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hd__a21oi_4.spice b/cells/a21oi/sky130_fd_sc_hd__a21oi_4.spice
index 0bb7767..7f83afe 100644
--- a/cells/a21oi/sky130_fd_sc_hd__a21oi_4.spice
+++ b/cells/a21oi/sky130_fd_sc_hd__a21oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a21oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a21oi_4 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_462_47# VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 Y B1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221o/sky130_fd_sc_hd__a221o_1.spice b/cells/a221o/sky130_fd_sc_hd__a221o_1.spice
index 5742c73..6e15e3a 100644
--- a/cells/a221o/sky130_fd_sc_hd__a221o_1.spice
+++ b/cells/a221o/sky130_fd_sc_hd__a221o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a221o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a221o_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 a_109_297# B1 a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND C1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221o/sky130_fd_sc_hd__a221o_2.spice b/cells/a221o/sky130_fd_sc_hd__a221o_2.spice
index 3c2a50c..cf810b6 100644
--- a/cells/a221o/sky130_fd_sc_hd__a221o_2.spice
+++ b/cells/a221o/sky130_fd_sc_hd__a221o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a221o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a221o_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 a_109_297# B1 a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VGND a_27_47# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221o/sky130_fd_sc_hd__a221o_4.spice b/cells/a221o/sky130_fd_sc_hd__a221o_4.spice
index d750dfb..1a3cc22 100644
--- a/cells/a221o/sky130_fd_sc_hd__a221o_4.spice
+++ b/cells/a221o/sky130_fd_sc_hd__a221o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a221o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a221o_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 VGND B2 a_1053_47# VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_445_297# B2 a_804_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221oi/sky130_fd_sc_hd__a221oi_1.spice b/cells/a221oi/sky130_fd_sc_hd__a221oi_1.spice
index f102c46..c117808 100644
--- a/cells/a221oi/sky130_fd_sc_hd__a221oi_1.spice
+++ b/cells/a221oi/sky130_fd_sc_hd__a221oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a221oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a221oi_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_109_297# B1 a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_204_47# B2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221oi/sky130_fd_sc_hd__a221oi_2.spice b/cells/a221oi/sky130_fd_sc_hd__a221oi_2.spice
index 0c85d12..40601f3 100644
--- a/cells/a221oi/sky130_fd_sc_hd__a221oi_2.spice
+++ b/cells/a221oi/sky130_fd_sc_hd__a221oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a221oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a221oi_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_27_297# C1 Y VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND B2 a_383_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221oi/sky130_fd_sc_hd__a221oi_4.spice b/cells/a221oi/sky130_fd_sc_hd__a221oi_4.spice
index 21062c3..bb18e21 100644
--- a/cells/a221oi/sky130_fd_sc_hd__a221oi_4.spice
+++ b/cells/a221oi/sky130_fd_sc_hd__a221oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a221oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a221oi_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_453_47# B2 VGND VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR A1 a_471_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a222oi/sky130_fd_sc_hd__a222oi_1.spice b/cells/a222oi/sky130_fd_sc_hd__a222oi_1.spice
index 1437004..67048c2 100644
--- a/cells/a222oi/sky130_fd_sc_hd__a222oi_1.spice
+++ b/cells/a222oi/sky130_fd_sc_hd__a222oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a222oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a222oi_1 A1 A2 B1 B2 C1 C2 VGND VNB VPB VPWR Y
 M1000 a_311_297# A2 VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_109_47# C1 Y VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22o/sky130_fd_sc_hd__a22o_1.spice b/cells/a22o/sky130_fd_sc_hd__a22o_1.spice
index 6b1d1b9..7c710b1 100644
--- a/cells/a22o/sky130_fd_sc_hd__a22o_1.spice
+++ b/cells/a22o/sky130_fd_sc_hd__a22o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a22o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a22o_1 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_109_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_27_297# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/a22o/sky130_fd_sc_hd__a22o_2.spice b/cells/a22o/sky130_fd_sc_hd__a22o_2.spice
index 3d50618..083da4d 100644
--- a/cells/a22o/sky130_fd_sc_hd__a22o_2.spice
+++ b/cells/a22o/sky130_fd_sc_hd__a22o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a22o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a22o_2 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_27_297# B1 a_109_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_109_47# B2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22o/sky130_fd_sc_hd__a22o_4.spice b/cells/a22o/sky130_fd_sc_hd__a22o_4.spice
index d6b6419..99f6354 100644
--- a/cells/a22o/sky130_fd_sc_hd__a22o_4.spice
+++ b/cells/a22o/sky130_fd_sc_hd__a22o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a22o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a22o_4 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 X a_96_21# VGND VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VGND B2 a_566_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22oi/sky130_fd_sc_hd__a22oi_1.spice b/cells/a22oi/sky130_fd_sc_hd__a22oi_1.spice
index 1a1f32d..bd12089 100644
--- a/cells/a22oi/sky130_fd_sc_hd__a22oi_1.spice
+++ b/cells/a22oi/sky130_fd_sc_hd__a22oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a22oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a22oi_1 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B1 a_109_47# VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_109_47# B2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22oi/sky130_fd_sc_hd__a22oi_2.spice b/cells/a22oi/sky130_fd_sc_hd__a22oi_2.spice
index cee8eb7..2525330 100644
--- a/cells/a22oi/sky130_fd_sc_hd__a22oi_2.spice
+++ b/cells/a22oi/sky130_fd_sc_hd__a22oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a22oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a22oi_2 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_109_297# B1 Y VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND B2 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22oi/sky130_fd_sc_hd__a22oi_4.spice b/cells/a22oi/sky130_fd_sc_hd__a22oi_4.spice
index 5fee019..1db0e53 100644
--- a/cells/a22oi/sky130_fd_sc_hd__a22oi_4.spice
+++ b/cells/a22oi/sky130_fd_sc_hd__a22oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a22oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a22oi_4 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 VGND B2 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_1.spice b/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_1.spice
index b4900ca..4e8b435 100644
--- a/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_1.spice
+++ b/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2bb2o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2bb2o_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 a_226_47# A2_N a_226_297# VPB phighvt w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_76_199# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_2.spice b/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_2.spice
index db81b39..bc2d38f 100644
--- a/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_2.spice
+++ b/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2bb2o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2bb2o_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 VGND A2_N a_313_47# VNB nshort w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 VPWR B2 a_574_369# VPB phighvt w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_4.spice b/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_4.spice
index 435c001..758f3f2 100644
--- a/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_4.spice
+++ b/cells/a2bb2o/sky130_fd_sc_hd__a2bb2o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2bb2o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2bb2o_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 X a_193_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_109_47# B1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_1.spice b/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_1.spice
index 342950e..c9d8e2a 100644
--- a/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_1.spice
+++ b/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2bb2oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2bb2oi_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 VPWR B2 a_397_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_397_297# B1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_2.spice b/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_2.spice
index b35147a..b568b56 100644
--- a/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_2.spice
+++ b/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2bb2oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2bb2oi_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 Y a_442_21# a_54_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_662_297# A1_N VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_4.spice b/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_4.spice
index 44d676b..ef66d6f 100644
--- a/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_4.spice
+++ b/cells/a2bb2oi/sky130_fd_sc_hd__a2bb2oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a2bb2oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a2bb2oi_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 VGND a_751_21# Y VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VGND a_751_21# Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a311o/sky130_fd_sc_hd__a311o_1.spice b/cells/a311o/sky130_fd_sc_hd__a311o_1.spice
index b4e0642..4792c83 100644
--- a/cells/a311o/sky130_fd_sc_hd__a311o_1.spice
+++ b/cells/a311o/sky130_fd_sc_hd__a311o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a311o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a311o_1 A1 A2 A3 B1 C1 VGND VNB VPB VPWR X
 M1000 a_75_199# C1 a_544_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_75_199# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/a311o/sky130_fd_sc_hd__a311o_2.spice b/cells/a311o/sky130_fd_sc_hd__a311o_2.spice
index 90daf5c..5f3d8c0 100644
--- a/cells/a311o/sky130_fd_sc_hd__a311o_2.spice
+++ b/cells/a311o/sky130_fd_sc_hd__a311o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a311o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a311o_2 A1 A2 A3 B1 C1 VGND VNB VPB VPWR X
 M1000 a_79_21# C1 a_635_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_319_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a311o/sky130_fd_sc_hd__a311o_4.spice b/cells/a311o/sky130_fd_sc_hd__a311o_4.spice
index ea229a0..912b7f5 100644
--- a/cells/a311o/sky130_fd_sc_hd__a311o_4.spice
+++ b/cells/a311o/sky130_fd_sc_hd__a311o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a311o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a311o_4 A1 A2 A3 B1 C1 VGND VNB VPB VPWR X
 M1000 a_1059_47# A2 a_861_47# VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_109_47# C1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a311oi/sky130_fd_sc_hd__a311oi_1.spice b/cells/a311oi/sky130_fd_sc_hd__a311oi_1.spice
index 4e2cf12..e98b308 100644
--- a/cells/a311oi/sky130_fd_sc_hd__a311oi_1.spice
+++ b/cells/a311oi/sky130_fd_sc_hd__a311oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a311oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a311oi_1 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_109_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_109_47# A3 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a311oi/sky130_fd_sc_hd__a311oi_2.spice b/cells/a311oi/sky130_fd_sc_hd__a311oi_2.spice
index c9fb71a..9469a0a 100644
--- a/cells/a311oi/sky130_fd_sc_hd__a311oi_2.spice
+++ b/cells/a311oi/sky130_fd_sc_hd__a311oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a311oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a311oi_2 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_109_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND A3 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a311oi/sky130_fd_sc_hd__a311oi_4.spice b/cells/a311oi/sky130_fd_sc_hd__a311oi_4.spice
index 92a1ef4..9eedc60 100644
--- a/cells/a311oi/sky130_fd_sc_hd__a311oi_4.spice
+++ b/cells/a311oi/sky130_fd_sc_hd__a311oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a311oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a311oi_4 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_1139_297# C1 Y VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 VGND A3 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31o/sky130_fd_sc_hd__a31o_1.spice b/cells/a31o/sky130_fd_sc_hd__a31o_1.spice
index b09f34a..faa772b 100644
--- a/cells/a31o/sky130_fd_sc_hd__a31o_1.spice
+++ b/cells/a31o/sky130_fd_sc_hd__a31o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a31o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a31o_1 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 a_209_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_80_21# B1 a_209_297# VPB phighvt w=1e+06u l=150000u
 +  ad=3.2e+11p pd=2.64e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/a31o/sky130_fd_sc_hd__a31o_2.spice b/cells/a31o/sky130_fd_sc_hd__a31o_2.spice
index 1357444..5ea9676 100644
--- a/cells/a31o/sky130_fd_sc_hd__a31o_2.spice
+++ b/cells/a31o/sky130_fd_sc_hd__a31o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a31o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a31o_2 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 a_79_21# A1 a_361_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 X a_79_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31o/sky130_fd_sc_hd__a31o_4.spice b/cells/a31o/sky130_fd_sc_hd__a31o_4.spice
index 6770035..a08dfe1 100644
--- a/cells/a31o/sky130_fd_sc_hd__a31o_4.spice
+++ b/cells/a31o/sky130_fd_sc_hd__a31o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a31o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a31o_4 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 a_277_47# B1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 VGND A3 a_445_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31oi/sky130_fd_sc_hd__a31oi_1.spice b/cells/a31oi/sky130_fd_sc_hd__a31oi_1.spice
index e64714a..d444c9a 100644
--- a/cells/a31oi/sky130_fd_sc_hd__a31oi_1.spice
+++ b/cells/a31oi/sky130_fd_sc_hd__a31oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a31oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a31oi_1 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VGND B1 Y VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_109_47# A3 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31oi/sky130_fd_sc_hd__a31oi_2.spice b/cells/a31oi/sky130_fd_sc_hd__a31oi_2.spice
index d630dd9..3f9db25 100644
--- a/cells/a31oi/sky130_fd_sc_hd__a31oi_2.spice
+++ b/cells/a31oi/sky130_fd_sc_hd__a31oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a31oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a31oi_2 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_27_297# B1 Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31oi/sky130_fd_sc_hd__a31oi_4.spice b/cells/a31oi/sky130_fd_sc_hd__a31oi_4.spice
index 8d86b1b..60f9980 100644
--- a/cells/a31oi/sky130_fd_sc_hd__a31oi_4.spice
+++ b/cells/a31oi/sky130_fd_sc_hd__a31oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a31oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a31oi_4 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 VPWR A1 a_27_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32o/sky130_fd_sc_hd__a32o_1.spice b/cells/a32o/sky130_fd_sc_hd__a32o_1.spice
index 3e85302..1043cab 100644
--- a/cells/a32o/sky130_fd_sc_hd__a32o_1.spice
+++ b/cells/a32o/sky130_fd_sc_hd__a32o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a32o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a32o_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 a_93_21# A1 a_346_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_250_297# A3 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32o/sky130_fd_sc_hd__a32o_2.spice b/cells/a32o/sky130_fd_sc_hd__a32o_2.spice
index de816ed..70b2290 100644
--- a/cells/a32o/sky130_fd_sc_hd__a32o_2.spice
+++ b/cells/a32o/sky130_fd_sc_hd__a32o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a32o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a32o_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 VPWR A3 a_299_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 X a_21_199# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32o/sky130_fd_sc_hd__a32o_4.spice b/cells/a32o/sky130_fd_sc_hd__a32o_4.spice
index 77b29ef..07340af 100644
--- a/cells/a32o/sky130_fd_sc_hd__a32o_4.spice
+++ b/cells/a32o/sky130_fd_sc_hd__a32o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a32o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a32o_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 X a_79_21# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_445_297# B1 a_79_21# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32oi/sky130_fd_sc_hd__a32oi_1.spice b/cells/a32oi/sky130_fd_sc_hd__a32oi_1.spice
index b5ccc73..755e8d6 100644
--- a/cells/a32oi/sky130_fd_sc_hd__a32oi_1.spice
+++ b/cells/a32oi/sky130_fd_sc_hd__a32oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a32oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a32oi_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B1 a_109_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A3 a_383_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32oi/sky130_fd_sc_hd__a32oi_2.spice b/cells/a32oi/sky130_fd_sc_hd__a32oi_2.spice
index fc2729c..b9bb9be 100644
--- a/cells/a32oi/sky130_fd_sc_hd__a32oi_2.spice
+++ b/cells/a32oi/sky130_fd_sc_hd__a32oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a32oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a32oi_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_478_47# A1 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32oi/sky130_fd_sc_hd__a32oi_4.spice b/cells/a32oi/sky130_fd_sc_hd__a32oi_4.spice
index 39fb967..a69b167 100644
--- a/cells/a32oi/sky130_fd_sc_hd__a32oi_4.spice
+++ b/cells/a32oi/sky130_fd_sc_hd__a32oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a32oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a32oi_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR A1 a_27_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a41o/sky130_fd_sc_hd__a41o_1.spice b/cells/a41o/sky130_fd_sc_hd__a41o_1.spice
index aefd17b..215e762 100644
--- a/cells/a41o/sky130_fd_sc_hd__a41o_1.spice
+++ b/cells/a41o/sky130_fd_sc_hd__a41o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a41o_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a41o_1 A1 A2 A3 A4 B1 VGND VNB VPB VPWR X
 M1000 a_297_297# A4 VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_79_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/a41o/sky130_fd_sc_hd__a41o_2.spice b/cells/a41o/sky130_fd_sc_hd__a41o_2.spice
index a24e120..9765e82 100644
--- a/cells/a41o/sky130_fd_sc_hd__a41o_2.spice
+++ b/cells/a41o/sky130_fd_sc_hd__a41o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a41o_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a41o_2 A1 A2 A3 A4 B1 VGND VNB VPB VPWR X
 M1000 a_381_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 X a_79_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a41o/sky130_fd_sc_hd__a41o_4.spice b/cells/a41o/sky130_fd_sc_hd__a41o_4.spice
index c2d5d19..92295bb 100644
--- a/cells/a41o/sky130_fd_sc_hd__a41o_4.spice
+++ b/cells/a41o/sky130_fd_sc_hd__a41o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a41o_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a41o_4 A1 A2 A3 A4 B1 VGND VNB VPB VPWR X
 M1000 X a_79_21# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_1079_47# A3 a_889_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a41oi/sky130_fd_sc_hd__a41oi_1.spice b/cells/a41oi/sky130_fd_sc_hd__a41oi_1.spice
index 390d0c6..971ce49 100644
--- a/cells/a41oi/sky130_fd_sc_hd__a41oi_1.spice
+++ b/cells/a41oi/sky130_fd_sc_hd__a41oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a41oi_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a41oi_1 A1 A2 A3 A4 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A4 a_109_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_236_47# A4 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a41oi/sky130_fd_sc_hd__a41oi_2.spice b/cells/a41oi/sky130_fd_sc_hd__a41oi_2.spice
index 78269d0..45ba56a 100644
--- a/cells/a41oi/sky130_fd_sc_hd__a41oi_2.spice
+++ b/cells/a41oi/sky130_fd_sc_hd__a41oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a41oi_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a41oi_2 A1 A2 A3 A4 B1 VGND VNB VPB VPWR Y
 M1000 Y B1 VGND VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_149_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a41oi/sky130_fd_sc_hd__a41oi_4.spice b/cells/a41oi/sky130_fd_sc_hd__a41oi_4.spice
index 68be06a..3c212fc 100644
--- a/cells/a41oi/sky130_fd_sc_hd__a41oi_4.spice
+++ b/cells/a41oi/sky130_fd_sc_hd__a41oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__a41oi_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__a41oi_4 A1 A2 A3 A4 B1 VGND VNB VPB VPWR Y
 M1000 a_1269_47# A3 a_911_47# VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_911_47# A2 a_493_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hd__and2_0.spice b/cells/and2/sky130_fd_sc_hd__and2_0.spice
index b9f66e2..d5989ea 100644
--- a/cells/and2/sky130_fd_sc_hd__and2_0.spice
+++ b/cells/and2/sky130_fd_sc_hd__and2_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2_0 A B VGND VNB VPB VPWR X
 M1000 VPWR B a_40_47# VPB phighvt w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 a_40_47# A VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hd__and2_1.spice b/cells/and2/sky130_fd_sc_hd__and2_1.spice
index 941ace2..2010a05 100644
--- a/cells/and2/sky130_fd_sc_hd__and2_1.spice
+++ b/cells/and2/sky130_fd_sc_hd__and2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2_1 A B VGND VNB VPB VPWR X
 M1000 a_59_75# A VPWR VPB phighvt w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 VPWR B a_59_75# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hd__and2_2.spice b/cells/and2/sky130_fd_sc_hd__and2_2.spice
index 2defe2e..0449b43 100644
--- a/cells/and2/sky130_fd_sc_hd__and2_2.spice
+++ b/cells/and2/sky130_fd_sc_hd__and2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2_2 A B VGND VNB VPB VPWR X
 M1000 VGND B a_147_75# VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 X a_61_75# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hd__and2_4.spice b/cells/and2/sky130_fd_sc_hd__and2_4.spice
index 2af9696..d741014 100644
--- a/cells/and2/sky130_fd_sc_hd__and2_4.spice
+++ b/cells/and2/sky130_fd_sc_hd__and2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2_4 A B VGND VNB VPB VPWR X
 M1000 VGND B a_110_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2b/sky130_fd_sc_hd__and2b_1.spice b/cells/and2b/sky130_fd_sc_hd__and2b_1.spice
index 0c50de3..0ec432c 100644
--- a/cells/and2b/sky130_fd_sc_hd__and2b_1.spice
+++ b/cells/and2b/sky130_fd_sc_hd__and2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2b_1 A_N B VGND VNB VPB VPWR X
 M1000 VPWR B a_207_413# VPB phighvt w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_27_413# A_N VGND VNB nshort w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/and2b/sky130_fd_sc_hd__and2b_2.spice b/cells/and2b/sky130_fd_sc_hd__and2b_2.spice
index 2c3623a..94e9dc9 100644
--- a/cells/and2b/sky130_fd_sc_hd__and2b_2.spice
+++ b/cells/and2b/sky130_fd_sc_hd__and2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2b_2 A_N B VGND VNB VPB VPWR X
 M1000 a_212_413# a_27_413# VPWR VPB phighvt w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_212_413# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2b/sky130_fd_sc_hd__and2b_4.spice b/cells/and2b/sky130_fd_sc_hd__and2b_4.spice
index d01c9bc..188c43f 100644
--- a/cells/and2b/sky130_fd_sc_hd__and2b_4.spice
+++ b/cells/and2b/sky130_fd_sc_hd__and2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and2b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and2b_4 A_N B VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hd__and3_1.spice b/cells/and3/sky130_fd_sc_hd__and3_1.spice
index bc552f3..2d80215 100644
--- a/cells/and3/sky130_fd_sc_hd__and3_1.spice
+++ b/cells/and3/sky130_fd_sc_hd__and3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and3_1 A B C VGND VNB VPB VPWR X
 M1000 a_27_47# B VPWR VPB phighvt w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR C a_27_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hd__and3_2.spice b/cells/and3/sky130_fd_sc_hd__and3_2.spice
index 97d8f04..54fcc14 100644
--- a/cells/and3/sky130_fd_sc_hd__and3_2.spice
+++ b/cells/and3/sky130_fd_sc_hd__and3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and3_2 A B C VGND VNB VPB VPWR X
 M1000 VPWR A a_29_311# VPB phighvt w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR a_29_311# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hd__and3_4.spice b/cells/and3/sky130_fd_sc_hd__and3_4.spice
index 241bd59..1aca3dc 100644
--- a/cells/and3/sky130_fd_sc_hd__and3_4.spice
+++ b/cells/and3/sky130_fd_sc_hd__and3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and3_4 A B C VGND VNB VPB VPWR X
 M1000 X a_94_47# VGND VNB nshort w=650000u l=150000u
@@ -30,4 +45,3 @@
 M1013 VPWR C a_94_47# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3b/sky130_fd_sc_hd__and3b_1.spice b/cells/and3b/sky130_fd_sc_hd__and3b_1.spice
index 5ae33c4..709bc06 100644
--- a/cells/and3b/sky130_fd_sc_hd__and3b_1.spice
+++ b/cells/and3b/sky130_fd_sc_hd__and3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and3b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and3b_1 A_N B C VGND VNB VPB VPWR X
 M1000 a_209_311# B VPWR VPB phighvt w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND C a_368_53# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3b/sky130_fd_sc_hd__and3b_2.spice b/cells/and3b/sky130_fd_sc_hd__and3b_2.spice
index e61361c..71c1dd6 100644
--- a/cells/and3b/sky130_fd_sc_hd__and3b_2.spice
+++ b/cells/and3b/sky130_fd_sc_hd__and3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and3b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and3b_2 A_N B C VGND VNB VPB VPWR X
 M1000 VPWR a_215_311# X VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_215_311# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3b/sky130_fd_sc_hd__and3b_4.spice b/cells/and3b/sky130_fd_sc_hd__and3b_4.spice
index f22d4bf..26afed7 100644
--- a/cells/and3b/sky130_fd_sc_hd__and3b_4.spice
+++ b/cells/and3b/sky130_fd_sc_hd__and3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and3b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and3b_4 A_N B C VGND VNB VPB VPWR X
 M1000 a_56_297# B VPWR VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VPWR a_56_297# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4/sky130_fd_sc_hd__and4_1.spice b/cells/and4/sky130_fd_sc_hd__and4_1.spice
index c904537..e79a0e0 100644
--- a/cells/and4/sky130_fd_sc_hd__and4_1.spice
+++ b/cells/and4/sky130_fd_sc_hd__and4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4_1 A B C D VGND VNB VPB VPWR X
 M1000 a_27_47# C VPWR VPB phighvt w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/and4/sky130_fd_sc_hd__and4_2.spice b/cells/and4/sky130_fd_sc_hd__and4_2.spice
index 0a68a28..a275560 100644
--- a/cells/and4/sky130_fd_sc_hd__and4_2.spice
+++ b/cells/and4/sky130_fd_sc_hd__and4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4_2 A B C D VGND VNB VPB VPWR X
 M1000 a_198_47# B a_109_47# VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND D a_304_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4/sky130_fd_sc_hd__and4_4.spice b/cells/and4/sky130_fd_sc_hd__and4_4.spice
index 010559d..4d8d6dd 100644
--- a/cells/and4/sky130_fd_sc_hd__and4_4.spice
+++ b/cells/and4/sky130_fd_sc_hd__and4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4_4 A B C D VGND VNB VPB VPWR X
 M1000 VPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND a_27_47# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4b/sky130_fd_sc_hd__and4b_1.spice b/cells/and4b/sky130_fd_sc_hd__and4b_1.spice
index fc676a6..6701c59 100644
--- a/cells/and4b/sky130_fd_sc_hd__and4b_1.spice
+++ b/cells/and4b/sky130_fd_sc_hd__and4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4b_1 A_N B C D VGND VNB VPB VPWR X
 M1000 X a_193_413# VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR D a_193_413# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4b/sky130_fd_sc_hd__and4b_2.spice b/cells/and4b/sky130_fd_sc_hd__and4b_2.spice
index 731d607..b31ba44 100644
--- a/cells/and4b/sky130_fd_sc_hd__and4b_2.spice
+++ b/cells/and4b/sky130_fd_sc_hd__and4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4b_2 A_N B C D VGND VNB VPB VPWR X
 M1000 VPWR a_193_413# X VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VPWR D a_193_413# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4b/sky130_fd_sc_hd__and4b_4.spice b/cells/and4b/sky130_fd_sc_hd__and4b_4.spice
index 6cfbfea..69468cb 100644
--- a/cells/and4b/sky130_fd_sc_hd__and4b_4.spice
+++ b/cells/and4b/sky130_fd_sc_hd__and4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4b_4 A_N B C D VGND VNB VPB VPWR X
 M1000 VPWR a_27_47# a_174_21# VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 X a_174_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4bb/sky130_fd_sc_hd__and4bb_1.spice b/cells/and4bb/sky130_fd_sc_hd__and4bb_1.spice
index a3c3036..ad72122 100644
--- a/cells/and4bb/sky130_fd_sc_hd__and4bb_1.spice
+++ b/cells/and4bb/sky130_fd_sc_hd__and4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4bb_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4bb_1 A_N B_N C D VGND VNB VPB VPWR X
 M1000 a_615_93# C a_515_93# VNB nshort w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 X a_343_93# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/and4bb/sky130_fd_sc_hd__and4bb_2.spice b/cells/and4bb/sky130_fd_sc_hd__and4bb_2.spice
index a47113f..d1ffadc 100644
--- a/cells/and4bb/sky130_fd_sc_hd__and4bb_2.spice
+++ b/cells/and4bb/sky130_fd_sc_hd__and4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4bb_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4bb_2 A_N B_N C D VGND VNB VPB VPWR X
 M1000 VPWR a_174_21# X VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 X a_174_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4bb/sky130_fd_sc_hd__and4bb_4.spice b/cells/and4bb/sky130_fd_sc_hd__and4bb_4.spice
index 350cc49..ff2aeef 100644
--- a/cells/and4bb/sky130_fd_sc_hd__and4bb_4.spice
+++ b/cells/and4bb/sky130_fd_sc_hd__and4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__and4bb_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__and4bb_4 A_N B_N C D VGND VNB VPB VPWR X
 M1000 VPWR a_174_21# X VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 X a_174_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_1.spice b/cells/buf/sky130_fd_sc_hd__buf_1.spice
index d6735de..0b7d446 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_1.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_1 A VGND VNB VPB VPWR X
 M1000 VPWR A a_27_47# VPB phighvt w=790000u l=150000u
@@ -10,4 +25,3 @@
 M1003 VGND A a_27_47# VNB nshort w=520000u l=150000u
 +  ad=0p pd=0u as=1.352e+11p ps=1.56e+06u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_12.spice b/cells/buf/sky130_fd_sc_hd__buf_12.spice
index 7b6ad0d..6fa6eb5 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_12.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_12.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_12 A VGND VNB VPB VPWR X
 M1000 VGND a_109_47# X VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 X a_109_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_16.spice b/cells/buf/sky130_fd_sc_hd__buf_16.spice
index a58b197..074f66c 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_16.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_16 A VGND VNB VPB VPWR X
 M1000 VGND a_109_47# X VNB nshort w=650000u l=150000u
@@ -90,4 +105,3 @@
 M1043 X a_109_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_2.spice b/cells/buf/sky130_fd_sc_hd__buf_2.spice
index 21283d0..43c2aaf 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_2.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_2 A VGND VNB VPB VPWR X
 M1000 VPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 X a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_4.spice b/cells/buf/sky130_fd_sc_hd__buf_4.spice
index 908e4b1..daa43ee 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_4.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_4 A VGND VNB VPB VPWR X
 M1000 VPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_6.spice b/cells/buf/sky130_fd_sc_hd__buf_6.spice
index 61a7638..f3829c5 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_6.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_6.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_6 A VGND VNB VPB VPWR X
 M1000 VPWR a_161_47# X VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND a_161_47# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hd__buf_8.spice b/cells/buf/sky130_fd_sc_hd__buf_8.spice
index d77954c..5b4c030 100644
--- a/cells/buf/sky130_fd_sc_hd__buf_8.spice
+++ b/cells/buf/sky130_fd_sc_hd__buf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__buf_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__buf_8 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VGND VNB nshort w=650000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VGND A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/bufbuf/sky130_fd_sc_hd__bufbuf_16.spice b/cells/bufbuf/sky130_fd_sc_hd__bufbuf_16.spice
index 013ca3a..3794efa 100644
--- a/cells/bufbuf/sky130_fd_sc_hd__bufbuf_16.spice
+++ b/cells/bufbuf/sky130_fd_sc_hd__bufbuf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__bufbuf_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__bufbuf_16 A VGND VNB VPB VPWR X
 M1000 VGND a_549_47# X VNB nshort w=650000u l=150000u
@@ -106,4 +121,3 @@
 M1051 VGND a_549_47# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/bufbuf/sky130_fd_sc_hd__bufbuf_8.spice b/cells/bufbuf/sky130_fd_sc_hd__bufbuf_8.spice
index cc7a8f4..772533e 100644
--- a/cells/bufbuf/sky130_fd_sc_hd__bufbuf_8.spice
+++ b/cells/bufbuf/sky130_fd_sc_hd__bufbuf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__bufbuf_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__bufbuf_8 A VGND VNB VPB VPWR X
 M1000 VPWR a_318_47# X VPB phighvt w=1e+06u l=150000u
@@ -54,4 +69,3 @@
 M1025 VGND a_206_47# a_318_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/bufinv/sky130_fd_sc_hd__bufinv_16.spice b/cells/bufinv/sky130_fd_sc_hd__bufinv_16.spice
index 088148e..a4800dd 100644
--- a/cells/bufinv/sky130_fd_sc_hd__bufinv_16.spice
+++ b/cells/bufinv/sky130_fd_sc_hd__bufinv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__bufinv_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__bufinv_16 A VGND VNB VPB VPWR Y
 M1000 Y a_361_47# VGND VNB nshort w=650000u l=150000u
@@ -102,4 +117,3 @@
 M1049 VGND a_361_47# Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/bufinv/sky130_fd_sc_hd__bufinv_8.spice b/cells/bufinv/sky130_fd_sc_hd__bufinv_8.spice
index c9d4874..5ddc12b 100644
--- a/cells/bufinv/sky130_fd_sc_hd__bufinv_8.spice
+++ b/cells/bufinv/sky130_fd_sc_hd__bufinv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__bufinv_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__bufinv_8 A VGND VNB VPB VPWR Y
 M1000 Y a_215_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_109_47# A VGND VNB nshort w=650000u l=150000u
 +  ad=1.69e+11p pd=1.82e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_1.spice b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_1.spice
index 7145df1..37a4533 100644
--- a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_1.spice
+++ b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkbuf_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkbuf_1 A VGND VNB VPB VPWR X
 M1000 VPWR a_75_212# X VPB phighvt w=790000u l=150000u
@@ -10,4 +25,3 @@
 M1003 VGND a_75_212# X VNB nshort w=520000u l=150000u
 +  ad=0p pd=0u as=1.352e+11p ps=1.56e+06u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_16.spice b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_16.spice
index f8e67bb..506e4a3 100644
--- a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_16.spice
+++ b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkbuf_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkbuf_16 A VGND VNB VPB VPWR X
 M1000 X a_110_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_110_47# A VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_2.spice b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_2.spice
index b20dbe1..9d38118 100644
--- a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_2.spice
+++ b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkbuf_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkbuf_2 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 VPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_4.spice b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_4.spice
index c92ff16..5f78829 100644
--- a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_4.spice
+++ b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkbuf_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkbuf_4 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VGND VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_8.spice b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_8.spice
index 7814f78..a8eea10 100644
--- a/cells/clkbuf/sky130_fd_sc_hd__clkbuf_8.spice
+++ b/cells/clkbuf/sky130_fd_sc_hd__clkbuf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkbuf_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkbuf_8 A VGND VNB VPB VPWR X
 M1000 X a_110_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 X a_110_47# VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_1.spice b/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_1.spice
index e48c882..e643c91 100644
--- a/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_1.spice
+++ b/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s15_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s15_1 A VGND VNB VPB VPWR X
 M1000 VPWR a_282_47# a_394_47# VPB phighvt w=820000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_282_47# a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=1.7225e+11p pd=1.83e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_2.spice b/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_2.spice
index 6014099..68a6df1 100644
--- a/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_2.spice
+++ b/cells/clkdlybuf4s15/sky130_fd_sc_hd__clkdlybuf4s15_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s15_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s15_2 A VGND VNB VPB VPWR X
 M1000 VGND A a_27_47# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND a_228_47# a_362_333# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_1.spice b/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_1.spice
index c36ed71..c658af1 100644
--- a/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_1.spice
+++ b/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s18_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s18_1 A VGND VNB VPB VPWR X
 M1000 a_282_47# a_27_47# VGND VNB nshort w=650000u l=180000u
@@ -18,4 +33,3 @@
 M1007 X a_394_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.65e+11p pd=2.53e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_2.spice b/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_2.spice
index 5a8ce19..7f308b6 100644
--- a/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_2.spice
+++ b/cells/clkdlybuf4s18/sky130_fd_sc_hd__clkdlybuf4s18_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s18_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s18_2 A VGND VNB VPB VPWR X
 M1000 VGND A a_27_47# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_227_47# a_27_47# VPWR VPB phighvt w=820000u l=180000u
 +  ad=2.173e+11p pd=2.17e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_1.spice b/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_1.spice
index d32f4ee..3a3bba8 100644
--- a/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_1.spice
+++ b/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s25_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s25_1 A VGND VNB VPB VPWR X
 M1000 VPWR a_244_47# a_355_47# VPB phighvt w=820000u l=250000u
@@ -18,4 +33,3 @@
 M1007 a_244_47# a_27_47# VPWR VPB phighvt w=820000u l=250000u
 +  ad=2.173e+11p pd=2.17e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_2.spice b/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_2.spice
index 3f4bd9f..fcdc516 100644
--- a/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_2.spice
+++ b/cells/clkdlybuf4s25/sky130_fd_sc_hd__clkdlybuf4s25_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s25_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s25_2 A VGND VNB VPB VPWR X
 M1000 X a_331_47# VGND VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND a_331_47# X VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_1.spice b/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_1.spice
index b2a4bf4..8294fb7 100644
--- a/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_1.spice
+++ b/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s50_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s50_1 A VGND VNB VPB VPWR X
 M1000 X a_390_47# VGND VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 X a_390_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=3.55e+11p pd=2.71e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_2.spice b/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_2.spice
index b404d0a..ceacb63 100644
--- a/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_2.spice
+++ b/cells/clkdlybuf4s50/sky130_fd_sc_hd__clkdlybuf4s50_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkdlybuf4s50_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkdlybuf4s50_2 A VGND VNB VPB VPWR X
 M1000 VGND a_283_47# a_390_47# VNB nshort w=650000u l=500000u
@@ -22,4 +37,3 @@
 M1009 X a_390_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hd__clkinv_1.spice b/cells/clkinv/sky130_fd_sc_hd__clkinv_1.spice
index e2a4038..d1f3dce 100644
--- a/cells/clkinv/sky130_fd_sc_hd__clkinv_1.spice
+++ b/cells/clkinv/sky130_fd_sc_hd__clkinv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinv_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinv_1 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=840000u l=150000u
@@ -8,4 +23,3 @@
 M1002 VGND A Y VNB nshort w=420000u l=150000u
 +  ad=1.197e+11p pd=1.41e+06u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hd__clkinv_16.spice b/cells/clkinv/sky130_fd_sc_hd__clkinv_16.spice
index 9c589e5..ba13ec5 100644
--- a/cells/clkinv/sky130_fd_sc_hd__clkinv_16.spice
+++ b/cells/clkinv/sky130_fd_sc_hd__clkinv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinv_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinv_16 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hd__clkinv_2.spice b/cells/clkinv/sky130_fd_sc_hd__clkinv_2.spice
index e32e787..f6c5bf2 100644
--- a/cells/clkinv/sky130_fd_sc_hd__clkinv_2.spice
+++ b/cells/clkinv/sky130_fd_sc_hd__clkinv_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinv_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinv_2 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -12,4 +27,3 @@
 M1004 VGND A Y VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hd__clkinv_4.spice b/cells/clkinv/sky130_fd_sc_hd__clkinv_4.spice
index 7f74b8d..50bb734 100644
--- a/cells/clkinv/sky130_fd_sc_hd__clkinv_4.spice
+++ b/cells/clkinv/sky130_fd_sc_hd__clkinv_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinv_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinv_4 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 Y A VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hd__clkinv_8.spice b/cells/clkinv/sky130_fd_sc_hd__clkinv_8.spice
index bd2dc45..33e1841 100644
--- a/cells/clkinv/sky130_fd_sc_hd__clkinv_8.spice
+++ b/cells/clkinv/sky130_fd_sc_hd__clkinv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinv_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinv_8 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_2.spice b/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_2.spice
index 431d790..305d452 100644
--- a/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_2.spice
+++ b/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinvlp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinvlp_2 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=250000u
@@ -10,4 +25,3 @@
 M1003 a_150_67# A VGND VNB nshort w=550000u l=150000u
 +  ad=0p pd=0u as=1.5675e+11p ps=1.67e+06u
 .ends
-
diff --git a/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_4.spice b/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_4.spice
index cde905a..1718450 100644
--- a/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_4.spice
+++ b/cells/clkinvlp/sky130_fd_sc_hd__clkinvlp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__clkinvlp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__clkinvlp_4 A VGND VNB VPB VPWR Y
 M1000 Y A a_110_47# VNB nshort w=550000u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR A Y VPB phighvt w=1e+06u l=250000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/conb/sky130_fd_sc_hd__conb_1.spice b/cells/conb/sky130_fd_sc_hd__conb_1.spice
index e4ce40d..cc5abd2 100644
--- a/cells/conb/sky130_fd_sc_hd__conb_1.spice
+++ b/cells/conb/sky130_fd_sc_hd__conb_1.spice
@@ -1,7 +1,21 @@
-* NGSPICE file created from sky130_fd_sc_hd__conb_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__conb_1 VGND VNB VPB VPWR HI LO
 R0 VGND LO short w=480000u l=45000u
 R1 HI VPWR short w=480000u l=45000u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hd__decap_12.spice b/cells/decap/sky130_fd_sc_hd__decap_12.spice
index 33fb5d3..3b5bd50 100644
--- a/cells/decap/sky130_fd_sc_hd__decap_12.spice
+++ b/cells/decap/sky130_fd_sc_hd__decap_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__decap_12.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__decap_12 VGND VNB VPB VPWR
 M1000 VPWR VGND VPWR VPB phighvt w=870000u l=4.73e+06u
@@ -6,4 +21,3 @@
 M1001 VGND VPWR VGND VNB nshort w=550000u l=4.73e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hd__decap_3.spice b/cells/decap/sky130_fd_sc_hd__decap_3.spice
index 213d35f..1749ee1 100644
--- a/cells/decap/sky130_fd_sc_hd__decap_3.spice
+++ b/cells/decap/sky130_fd_sc_hd__decap_3.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__decap_3.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__decap_3 VGND VNB VPB VPWR
 M1000 VPWR VGND VPWR VPB phighvt w=870000u l=590000u
@@ -6,4 +21,3 @@
 M1001 VGND VPWR VGND VNB nshort w=550000u l=590000u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hd__decap_4.spice b/cells/decap/sky130_fd_sc_hd__decap_4.spice
index df07157..8ce6e4f 100644
--- a/cells/decap/sky130_fd_sc_hd__decap_4.spice
+++ b/cells/decap/sky130_fd_sc_hd__decap_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__decap_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__decap_4 VGND VNB VPB VPWR
 M1000 VPWR VGND VPWR VPB phighvt w=870000u l=1.05e+06u
@@ -6,4 +21,3 @@
 M1001 VGND VPWR VGND VNB nshort w=550000u l=1.05e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hd__decap_6.spice b/cells/decap/sky130_fd_sc_hd__decap_6.spice
index 55be353..f8c784f 100644
--- a/cells/decap/sky130_fd_sc_hd__decap_6.spice
+++ b/cells/decap/sky130_fd_sc_hd__decap_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__decap_6.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__decap_6 VGND VNB VPB VPWR
 M1000 VPWR VGND VPWR VPB phighvt w=870000u l=1.97e+06u
@@ -6,4 +21,3 @@
 M1001 VGND VPWR VGND VNB nshort w=550000u l=1.97e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hd__decap_8.spice b/cells/decap/sky130_fd_sc_hd__decap_8.spice
index 3e41992..afb2299 100644
--- a/cells/decap/sky130_fd_sc_hd__decap_8.spice
+++ b/cells/decap/sky130_fd_sc_hd__decap_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__decap_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__decap_8 VGND VNB VPB VPWR
 M1000 VPWR VGND VPWR VPB phighvt w=870000u l=2.89e+06u
@@ -6,4 +21,3 @@
 M1001 VGND VPWR VGND VNB nshort w=550000u l=2.89e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dfbbn/sky130_fd_sc_hd__dfbbn_1.spice b/cells/dfbbn/sky130_fd_sc_hd__dfbbn_1.spice
index 1ebcd1e..0644c38 100644
--- a/cells/dfbbn/sky130_fd_sc_hd__dfbbn_1.spice
+++ b/cells/dfbbn/sky130_fd_sc_hd__dfbbn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfbbn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfbbn_1 CLK_N D RESET_B SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -82,4 +97,3 @@
 M1039 Q_N a_1415_315# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dfbbn/sky130_fd_sc_hd__dfbbn_2.spice b/cells/dfbbn/sky130_fd_sc_hd__dfbbn_2.spice
index fd81e4e..edd5ca1 100644
--- a/cells/dfbbn/sky130_fd_sc_hd__dfbbn_2.spice
+++ b/cells/dfbbn/sky130_fd_sc_hd__dfbbn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfbbn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfbbn_2 CLK_N D RESET_B SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -90,4 +105,3 @@
 M1043 VPWR a_944_21# a_1665_329# VPB phighvt w=840000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfbbp/sky130_fd_sc_hd__dfbbp_1.spice b/cells/dfbbp/sky130_fd_sc_hd__dfbbp_1.spice
index a959474..0a1cd7d 100644
--- a/cells/dfbbp/sky130_fd_sc_hd__dfbbp_1.spice
+++ b/cells/dfbbp/sky130_fd_sc_hd__dfbbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfbbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfbbp_1 CLK D RESET_B SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -82,4 +97,3 @@
 M1039 Q_N a_1429_21# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrbp/sky130_fd_sc_hd__dfrbp_1.spice b/cells/dfrbp/sky130_fd_sc_hd__dfrbp_1.spice
index ab8136b..b986529 100644
--- a/cells/dfrbp/sky130_fd_sc_hd__dfrbp_1.spice
+++ b/cells/dfrbp/sky130_fd_sc_hd__dfrbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfrbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfrbp_1 CLK D RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_651_413# RESET_B VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrbp/sky130_fd_sc_hd__dfrbp_2.spice b/cells/dfrbp/sky130_fd_sc_hd__dfrbp_2.spice
index fac115c..feba07a 100644
--- a/cells/dfrbp/sky130_fd_sc_hd__dfrbp_2.spice
+++ b/cells/dfrbp/sky130_fd_sc_hd__dfrbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfrbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfrbp_2 CLK D RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -74,4 +89,3 @@
 M1035 VGND a_1659_47# Q_N VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrtn/sky130_fd_sc_hd__dfrtn_1.spice b/cells/dfrtn/sky130_fd_sc_hd__dfrtn_1.spice
index 22a3af5..5900595 100644
--- a/cells/dfrtn/sky130_fd_sc_hd__dfrtn_1.spice
+++ b/cells/dfrtn/sky130_fd_sc_hd__dfrtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfrtn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfrtn_1 CLK_N D RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_651_413# RESET_B VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrtp/sky130_fd_sc_hd__dfrtp_1.spice b/cells/dfrtp/sky130_fd_sc_hd__dfrtp_1.spice
index b9f9b2a..4bf4224 100644
--- a/cells/dfrtp/sky130_fd_sc_hd__dfrtp_1.spice
+++ b/cells/dfrtp/sky130_fd_sc_hd__dfrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfrtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfrtp_1 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_651_413# RESET_B VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrtp/sky130_fd_sc_hd__dfrtp_2.spice b/cells/dfrtp/sky130_fd_sc_hd__dfrtp_2.spice
index d8d2613..138bd08 100644
--- a/cells/dfrtp/sky130_fd_sc_hd__dfrtp_2.spice
+++ b/cells/dfrtp/sky130_fd_sc_hd__dfrtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfrtp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfrtp_2 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -62,4 +77,3 @@
 M1029 a_651_413# RESET_B VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrtp/sky130_fd_sc_hd__dfrtp_4.spice b/cells/dfrtp/sky130_fd_sc_hd__dfrtp_4.spice
index a1b17e1..9507aae 100644
--- a/cells/dfrtp/sky130_fd_sc_hd__dfrtp_4.spice
+++ b/cells/dfrtp/sky130_fd_sc_hd__dfrtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfrtp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfrtp_4 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -70,4 +85,3 @@
 M1033 a_651_413# RESET_B VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfsbp/sky130_fd_sc_hd__dfsbp_1.spice b/cells/dfsbp/sky130_fd_sc_hd__dfsbp_1.spice
index d889c56..e521ebf 100644
--- a/cells/dfsbp/sky130_fd_sc_hd__dfsbp_1.spice
+++ b/cells/dfsbp/sky130_fd_sc_hd__dfsbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfsbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfsbp_1 CLK D SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -70,4 +85,3 @@
 M1033 a_562_413# a_27_47# a_476_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfsbp/sky130_fd_sc_hd__dfsbp_2.spice b/cells/dfsbp/sky130_fd_sc_hd__dfsbp_2.spice
index 6fa66fa..33519d0 100644
--- a/cells/dfsbp/sky130_fd_sc_hd__dfsbp_2.spice
+++ b/cells/dfsbp/sky130_fd_sc_hd__dfsbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfsbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfsbp_2 CLK D SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -78,4 +93,3 @@
 M1037 a_562_413# a_27_47# a_476_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hd__dfstp_1.spice b/cells/dfstp/sky130_fd_sc_hd__dfstp_1.spice
index 1c6f204..fadeecc 100644
--- a/cells/dfstp/sky130_fd_sc_hd__dfstp_1.spice
+++ b/cells/dfstp/sky130_fd_sc_hd__dfstp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfstp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfstp_1 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_562_413# a_27_47# a_476_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hd__dfstp_2.spice b/cells/dfstp/sky130_fd_sc_hd__dfstp_2.spice
index 242b6be..0ad7862 100644
--- a/cells/dfstp/sky130_fd_sc_hd__dfstp_2.spice
+++ b/cells/dfstp/sky130_fd_sc_hd__dfstp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfstp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfstp_2 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -70,4 +85,3 @@
 M1033 a_1300_47# a_1178_261# a_1228_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hd__dfstp_4.spice b/cells/dfstp/sky130_fd_sc_hd__dfstp_4.spice
index 8df3943..e50159d 100644
--- a/cells/dfstp/sky130_fd_sc_hd__dfstp_4.spice
+++ b/cells/dfstp/sky130_fd_sc_hd__dfstp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfstp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfstp_4 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_562_413# a_27_47# a_476_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxbp/sky130_fd_sc_hd__dfxbp_1.spice b/cells/dfxbp/sky130_fd_sc_hd__dfxbp_1.spice
index 873007c..a613b05 100644
--- a/cells/dfxbp/sky130_fd_sc_hd__dfxbp_1.spice
+++ b/cells/dfxbp/sky130_fd_sc_hd__dfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfxbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfxbp_1 CLK D VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_891_413# a_193_47# a_634_159# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxbp/sky130_fd_sc_hd__dfxbp_2.spice b/cells/dfxbp/sky130_fd_sc_hd__dfxbp_2.spice
index fadf319..e45845c 100644
--- a/cells/dfxbp/sky130_fd_sc_hd__dfxbp_2.spice
+++ b/cells/dfxbp/sky130_fd_sc_hd__dfxbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfxbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfxbp_2 CLK D VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_891_413# a_193_47# a_634_159# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxtp/sky130_fd_sc_hd__dfxtp_1.spice b/cells/dfxtp/sky130_fd_sc_hd__dfxtp_1.spice
index 4059f3a..511a55e 100644
--- a/cells/dfxtp/sky130_fd_sc_hd__dfxtp_1.spice
+++ b/cells/dfxtp/sky130_fd_sc_hd__dfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfxtp_1 CLK D VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_891_413# a_193_47# a_634_159# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxtp/sky130_fd_sc_hd__dfxtp_2.spice b/cells/dfxtp/sky130_fd_sc_hd__dfxtp_2.spice
index d2e7aa6..b8658fa 100644
--- a/cells/dfxtp/sky130_fd_sc_hd__dfxtp_2.spice
+++ b/cells/dfxtp/sky130_fd_sc_hd__dfxtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfxtp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfxtp_2 CLK D VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -54,4 +69,3 @@
 M1025 a_891_413# a_193_47# a_634_159# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxtp/sky130_fd_sc_hd__dfxtp_4.spice b/cells/dfxtp/sky130_fd_sc_hd__dfxtp_4.spice
index 530b1e8..bd75aa1 100644
--- a/cells/dfxtp/sky130_fd_sc_hd__dfxtp_4.spice
+++ b/cells/dfxtp/sky130_fd_sc_hd__dfxtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dfxtp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dfxtp_4 CLK D VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -62,4 +77,3 @@
 M1029 Q a_1062_300# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/diode/sky130_fd_sc_hd__diode_2.spice b/cells/diode/sky130_fd_sc_hd__diode_2.spice
index 2920cc3..5a94830 100644
--- a/cells/diode/sky130_fd_sc_hd__diode_2.spice
+++ b/cells/diode/sky130_fd_sc_hd__diode_2.spice
@@ -1,6 +1,20 @@
-* NGSPICE file created from sky130_fd_sc_hd__diode_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__diode_2 DIODE VGND VNB VPB VPWR
 D0 VNB DIODE ndiode p=5.36e+06u a=4.347e+11p
 .ends
-
diff --git a/cells/dlclkp/sky130_fd_sc_hd__dlclkp_1.spice b/cells/dlclkp/sky130_fd_sc_hd__dlclkp_1.spice
index 07409ff..36c55d6 100644
--- a/cells/dlclkp/sky130_fd_sc_hd__dlclkp_1.spice
+++ b/cells/dlclkp/sky130_fd_sc_hd__dlclkp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlclkp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlclkp_1 CLK GATE VGND VNB VPB VPWR GCLK
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND CLK a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/dlclkp/sky130_fd_sc_hd__dlclkp_2.spice b/cells/dlclkp/sky130_fd_sc_hd__dlclkp_2.spice
index b907468..1fec2c6 100644
--- a/cells/dlclkp/sky130_fd_sc_hd__dlclkp_2.spice
+++ b/cells/dlclkp/sky130_fd_sc_hd__dlclkp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlclkp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlclkp_2 CLK GATE VGND VNB VPB VPWR GCLK
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VGND a_643_307# a_652_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlclkp/sky130_fd_sc_hd__dlclkp_4.spice b/cells/dlclkp/sky130_fd_sc_hd__dlclkp_4.spice
index 7d7b9bc..215ec22 100644
--- a/cells/dlclkp/sky130_fd_sc_hd__dlclkp_4.spice
+++ b/cells/dlclkp/sky130_fd_sc_hd__dlclkp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlclkp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlclkp_4 CLK GATE VGND VNB VPB VPWR GCLK
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -54,4 +69,3 @@
 M1025 a_477_413# a_27_47# a_381_47# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrbn/sky130_fd_sc_hd__dlrbn_1.spice b/cells/dlrbn/sky130_fd_sc_hd__dlrbn_1.spice
index 161bf0c..e6e1d1a 100644
--- a/cells/dlrbn/sky130_fd_sc_hd__dlrbn_1.spice
+++ b/cells/dlrbn/sky130_fd_sc_hd__dlrbn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrbn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrbn_1 D GATE_N RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VPWR RESET_B a_724_21# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrbn/sky130_fd_sc_hd__dlrbn_2.spice b/cells/dlrbn/sky130_fd_sc_hd__dlrbn_2.spice
index 8194239..b27ad93 100644
--- a/cells/dlrbn/sky130_fd_sc_hd__dlrbn_2.spice
+++ b/cells/dlrbn/sky130_fd_sc_hd__dlrbn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrbn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrbn_2 D GATE_N RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -58,4 +73,3 @@
 M1027 VGND a_1313_47# Q_N VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrbp/sky130_fd_sc_hd__dlrbp_1.spice b/cells/dlrbp/sky130_fd_sc_hd__dlrbp_1.spice
index 7297343..e8e1ea0 100644
--- a/cells/dlrbp/sky130_fd_sc_hd__dlrbp_1.spice
+++ b/cells/dlrbp/sky130_fd_sc_hd__dlrbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrbp_1 D GATE RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VGND a_711_307# a_658_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrbp/sky130_fd_sc_hd__dlrbp_2.spice b/cells/dlrbp/sky130_fd_sc_hd__dlrbp_2.spice
index af033ae..24783b2 100644
--- a/cells/dlrbp/sky130_fd_sc_hd__dlrbp_2.spice
+++ b/cells/dlrbp/sky130_fd_sc_hd__dlrbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrbp_2 D GATE RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -58,4 +73,3 @@
 M1027 Q a_711_307# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtn/sky130_fd_sc_hd__dlrtn_1.spice b/cells/dlrtn/sky130_fd_sc_hd__dlrtn_1.spice
index 7745e18..39285e2 100644
--- a/cells/dlrtn/sky130_fd_sc_hd__dlrtn_1.spice
+++ b/cells/dlrtn/sky130_fd_sc_hd__dlrtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrtn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrtn_1 D GATE_N RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND GATE_N a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/dlrtn/sky130_fd_sc_hd__dlrtn_2.spice b/cells/dlrtn/sky130_fd_sc_hd__dlrtn_2.spice
index 403aae7..83444e7 100644
--- a/cells/dlrtn/sky130_fd_sc_hd__dlrtn_2.spice
+++ b/cells/dlrtn/sky130_fd_sc_hd__dlrtn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrtn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrtn_2 D GATE_N RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VGND a_711_307# a_658_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtn/sky130_fd_sc_hd__dlrtn_4.spice b/cells/dlrtn/sky130_fd_sc_hd__dlrtn_4.spice
index 226f9ee..3b79786 100644
--- a/cells/dlrtn/sky130_fd_sc_hd__dlrtn_4.spice
+++ b/cells/dlrtn/sky130_fd_sc_hd__dlrtn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrtn_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrtn_4 D GATE_N RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -54,4 +69,3 @@
 M1025 a_562_413# a_193_47# a_466_369# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hd__dlrtp_1.spice b/cells/dlrtp/sky130_fd_sc_hd__dlrtp_1.spice
index b060838..f03f6d3 100644
--- a/cells/dlrtp/sky130_fd_sc_hd__dlrtp_1.spice
+++ b/cells/dlrtp/sky130_fd_sc_hd__dlrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrtp_1 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND GATE a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hd__dlrtp_2.spice b/cells/dlrtp/sky130_fd_sc_hd__dlrtp_2.spice
index 5ee5148..03eb85e 100644
--- a/cells/dlrtp/sky130_fd_sc_hd__dlrtp_2.spice
+++ b/cells/dlrtp/sky130_fd_sc_hd__dlrtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrtp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrtp_2 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VPWR RESET_B a_711_307# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hd__dlrtp_4.spice b/cells/dlrtp/sky130_fd_sc_hd__dlrtp_4.spice
index a94ec48..a8a6b06 100644
--- a/cells/dlrtp/sky130_fd_sc_hd__dlrtp_4.spice
+++ b/cells/dlrtp/sky130_fd_sc_hd__dlrtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlrtp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlrtp_4 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -54,4 +69,3 @@
 M1025 a_562_413# a_27_47# a_466_369# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxbn/sky130_fd_sc_hd__dlxbn_1.spice b/cells/dlxbn/sky130_fd_sc_hd__dlxbn_1.spice
index 0358e74..fd3f870 100644
--- a/cells/dlxbn/sky130_fd_sc_hd__dlxbn_1.spice
+++ b/cells/dlxbn/sky130_fd_sc_hd__dlxbn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxbn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxbn_1 D GATE_N VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_674_413# a_27_47# a_560_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxbn/sky130_fd_sc_hd__dlxbn_2.spice b/cells/dlxbn/sky130_fd_sc_hd__dlxbn_2.spice
index aeb5c94..0ebf8ba 100644
--- a/cells/dlxbn/sky130_fd_sc_hd__dlxbn_2.spice
+++ b/cells/dlxbn/sky130_fd_sc_hd__dlxbn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxbn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxbn_2 D GATE_N VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -54,4 +69,3 @@
 M1025 VPWR a_728_21# a_1223_47# VPB phighvt w=640000u l=150000u
 +  ad=0p pd=0u as=1.664e+11p ps=1.8e+06u
 .ends
-
diff --git a/cells/dlxbp/sky130_fd_sc_hd__dlxbp_1.spice b/cells/dlxbp/sky130_fd_sc_hd__dlxbp_1.spice
index dec6a7e..b477a1f 100644
--- a/cells/dlxbp/sky130_fd_sc_hd__dlxbp_1.spice
+++ b/cells/dlxbp/sky130_fd_sc_hd__dlxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxbp_1 D GATE VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_560_47# a_27_47# a_467_369# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxtn/sky130_fd_sc_hd__dlxtn_1.spice b/cells/dlxtn/sky130_fd_sc_hd__dlxtn_1.spice
index 02a53b2..536e40d 100644
--- a/cells/dlxtn/sky130_fd_sc_hd__dlxtn_1.spice
+++ b/cells/dlxtn/sky130_fd_sc_hd__dlxtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxtn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxtn_1 D GATE_N VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_650_47# a_193_47# a_560_47# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxtn/sky130_fd_sc_hd__dlxtn_2.spice b/cells/dlxtn/sky130_fd_sc_hd__dlxtn_2.spice
index 8ce1a5b..d7141b1 100644
--- a/cells/dlxtn/sky130_fd_sc_hd__dlxtn_2.spice
+++ b/cells/dlxtn/sky130_fd_sc_hd__dlxtn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxtn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxtn_2 D GATE_N VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND D a_303_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/dlxtn/sky130_fd_sc_hd__dlxtn_4.spice b/cells/dlxtn/sky130_fd_sc_hd__dlxtn_4.spice
index 3a1a6aa..a8786a9 100644
--- a/cells/dlxtn/sky130_fd_sc_hd__dlxtn_4.spice
+++ b/cells/dlxtn/sky130_fd_sc_hd__dlxtn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxtn_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxtn_4 D GATE_N VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VPWR a_724_21# Q VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxtp/sky130_fd_sc_hd__dlxtp_1.spice b/cells/dlxtp/sky130_fd_sc_hd__dlxtp_1.spice
index e17b1fc..0468795 100644
--- a/cells/dlxtp/sky130_fd_sc_hd__dlxtp_1.spice
+++ b/cells/dlxtp/sky130_fd_sc_hd__dlxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlxtp_1 D GATE VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -38,4 +53,3 @@
 M1017 Q a_713_21# VGND VNB nshort w=650000u l=150000u
 +  ad=1.8525e+11p pd=1.87e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dlygate4sd1/sky130_fd_sc_hd__dlygate4sd1_1.spice b/cells/dlygate4sd1/sky130_fd_sc_hd__dlygate4sd1_1.spice
index 57dae95..4a8f0c0 100644
--- a/cells/dlygate4sd1/sky130_fd_sc_hd__dlygate4sd1_1.spice
+++ b/cells/dlygate4sd1/sky130_fd_sc_hd__dlygate4sd1_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlygate4sd1_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlygate4sd1_1 A VGND VNB VPB VPWR X
 M1000 VGND a_193_47# a_299_93# VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_193_47# a_27_47# VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dlygate4sd2/sky130_fd_sc_hd__dlygate4sd2_1.spice b/cells/dlygate4sd2/sky130_fd_sc_hd__dlygate4sd2_1.spice
index 4b4b750..1d65b69 100644
--- a/cells/dlygate4sd2/sky130_fd_sc_hd__dlygate4sd2_1.spice
+++ b/cells/dlygate4sd2/sky130_fd_sc_hd__dlygate4sd2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlygate4sd2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlygate4sd2_1 A VGND VNB VPB VPWR X
 M1000 X a_327_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR a_221_47# a_327_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/dlygate4sd3/sky130_fd_sc_hd__dlygate4sd3_1.spice b/cells/dlygate4sd3/sky130_fd_sc_hd__dlygate4sd3_1.spice
index 8e84ad8..ebb55e2 100644
--- a/cells/dlygate4sd3/sky130_fd_sc_hd__dlygate4sd3_1.spice
+++ b/cells/dlygate4sd3/sky130_fd_sc_hd__dlygate4sd3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlygate4sd3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlygate4sd3_1 A VGND VNB VPB VPWR X
 M1000 X a_391_47# VGND VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 X a_391_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dlymetal6s2s/sky130_fd_sc_hd__dlymetal6s2s_1.spice b/cells/dlymetal6s2s/sky130_fd_sc_hd__dlymetal6s2s_1.spice
index d1fc7ec..c87ed92 100644
--- a/cells/dlymetal6s2s/sky130_fd_sc_hd__dlymetal6s2s_1.spice
+++ b/cells/dlymetal6s2s/sky130_fd_sc_hd__dlymetal6s2s_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlymetal6s2s_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlymetal6s2s_1 A VGND VNB VPB VPWR X
 M1000 VPWR A a_62_47# VPB phighvt w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND X a_381_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/dlymetal6s4s/sky130_fd_sc_hd__dlymetal6s4s_1.spice b/cells/dlymetal6s4s/sky130_fd_sc_hd__dlymetal6s4s_1.spice
index 181de44..3ff02d9 100644
--- a/cells/dlymetal6s4s/sky130_fd_sc_hd__dlymetal6s4s_1.spice
+++ b/cells/dlymetal6s4s/sky130_fd_sc_hd__dlymetal6s4s_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlymetal6s4s_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlymetal6s4s_1 A VGND VNB VPB VPWR X
 M1000 VPWR A a_62_47# VPB phighvt w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_841_47# a_664_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dlymetal6s6s/sky130_fd_sc_hd__dlymetal6s6s_1.spice b/cells/dlymetal6s6s/sky130_fd_sc_hd__dlymetal6s6s_1.spice
index e63a497..4c684db 100644
--- a/cells/dlymetal6s6s/sky130_fd_sc_hd__dlymetal6s6s_1.spice
+++ b/cells/dlymetal6s6s/sky130_fd_sc_hd__dlymetal6s6s_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__dlymetal6s6s_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__dlymetal6s6s_1 A VGND VNB VPB VPWR X
 M1000 VGND a_240_47# a_346_47# VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR A a_63_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hd__ebufn_1.spice b/cells/ebufn/sky130_fd_sc_hd__ebufn_1.spice
index 2e1ae2e..dfe807d 100644
--- a/cells/ebufn/sky130_fd_sc_hd__ebufn_1.spice
+++ b/cells/ebufn/sky130_fd_sc_hd__ebufn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ebufn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ebufn_1 A TE_B VGND VNB VPB VPWR Z
 M1000 Z a_27_47# a_383_297# VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_193_369# TE_B VGND VNB nshort w=420000u l=150000u
 +  ad=2.583e+11p pd=2.07e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hd__ebufn_2.spice b/cells/ebufn/sky130_fd_sc_hd__ebufn_2.spice
index 1200a54..1c8413b 100644
--- a/cells/ebufn/sky130_fd_sc_hd__ebufn_2.spice
+++ b/cells/ebufn/sky130_fd_sc_hd__ebufn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ebufn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ebufn_2 A TE_B VGND VNB VPB VPWR Z
 M1000 a_320_309# a_27_47# Z VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_320_309# TE_B VPWR VPB phighvt w=940000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hd__ebufn_4.spice b/cells/ebufn/sky130_fd_sc_hd__ebufn_4.spice
index b3d00e3..83e9198 100644
--- a/cells/ebufn/sky130_fd_sc_hd__ebufn_4.spice
+++ b/cells/ebufn/sky130_fd_sc_hd__ebufn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ebufn_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ebufn_4 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_320_309# VPB phighvt w=940000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_320_309# TE_B VPWR VPB phighvt w=940000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hd__ebufn_8.spice b/cells/ebufn/sky130_fd_sc_hd__ebufn_8.spice
index eb905d2..585ad96 100644
--- a/cells/ebufn/sky130_fd_sc_hd__ebufn_8.spice
+++ b/cells/ebufn/sky130_fd_sc_hd__ebufn_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ebufn_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ebufn_8 A TE_B VGND VNB VPB VPWR Z
 M1000 a_455_47# a_301_47# VGND VNB nshort w=650000u l=150000u
@@ -78,4 +93,3 @@
 M1037 a_407_309# TE_B VPWR VPB phighvt w=940000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/edfxbp/sky130_fd_sc_hd__edfxbp_1.spice b/cells/edfxbp/sky130_fd_sc_hd__edfxbp_1.spice
index e395ef5..592a07f 100644
--- a/cells/edfxbp/sky130_fd_sc_hd__edfxbp_1.spice
+++ b/cells/edfxbp/sky130_fd_sc_hd__edfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__edfxbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__edfxbp_1 CLK D DE VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -74,4 +89,3 @@
 M1035 VGND a_1150_159# a_1101_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/edfxtp/sky130_fd_sc_hd__edfxtp_1.spice b/cells/edfxtp/sky130_fd_sc_hd__edfxtp_1.spice
index 625bcdb..c0fe252 100644
--- a/cells/edfxtp/sky130_fd_sc_hd__edfxtp_1.spice
+++ b/cells/edfxtp/sky130_fd_sc_hd__edfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__edfxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__edfxtp_1 CLK D DE VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -70,4 +85,3 @@
 M1033 VGND a_1150_159# a_1101_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hd__einvn_0.spice b/cells/einvn/sky130_fd_sc_hd__einvn_0.spice
index 8a5835c..7d11195 100644
--- a/cells/einvn/sky130_fd_sc_hd__einvn_0.spice
+++ b/cells/einvn/sky130_fd_sc_hd__einvn_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvn_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvn_0 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_30_47# VPB phighvt w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 Z A a_215_369# VPB phighvt w=640000u l=150000u
 +  ad=1.664e+11p pd=1.8e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hd__einvn_1.spice b/cells/einvn/sky130_fd_sc_hd__einvn_1.spice
index eaf0a36..b070a66 100644
--- a/cells/einvn/sky130_fd_sc_hd__einvn_1.spice
+++ b/cells/einvn/sky130_fd_sc_hd__einvn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvn_1 A TE_B VGND VNB VPB VPWR Z
 M1000 a_204_297# TE_B VPWR VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 VGND TE_B a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hd__einvn_2.spice b/cells/einvn/sky130_fd_sc_hd__einvn_2.spice
index ec8919b..6ccbfdd 100644
--- a/cells/einvn/sky130_fd_sc_hd__einvn_2.spice
+++ b/cells/einvn/sky130_fd_sc_hd__einvn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvn_2 A TE_B VGND VNB VPB VPWR Z
 M1000 Z A a_204_309# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 Z A a_214_120# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hd__einvn_4.spice b/cells/einvn/sky130_fd_sc_hd__einvn_4.spice
index 8b7a53f..f9521a5 100644
--- a/cells/einvn/sky130_fd_sc_hd__einvn_4.spice
+++ b/cells/einvn/sky130_fd_sc_hd__einvn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvn_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvn_4 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_204_309# VPB phighvt w=940000u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_215_47# A Z VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hd__einvn_8.spice b/cells/einvn/sky130_fd_sc_hd__einvn_8.spice
index 2e4987b..9cc0f80 100644
--- a/cells/einvn/sky130_fd_sc_hd__einvn_8.spice
+++ b/cells/einvn/sky130_fd_sc_hd__einvn_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvn_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvn_8 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_204_309# VPB phighvt w=940000u l=150000u
@@ -70,4 +85,3 @@
 M1033 Z A a_215_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hd__einvp_1.spice b/cells/einvp/sky130_fd_sc_hd__einvp_1.spice
index 1d0b8e4..a50744e 100644
--- a/cells/einvp/sky130_fd_sc_hd__einvp_1.spice
+++ b/cells/einvp/sky130_fd_sc_hd__einvp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvp_1 A TE VGND VNB VPB VPWR Z
 M1000 Z A a_204_47# VNB nshort w=650000u l=150000u
@@ -14,4 +29,3 @@
 M1005 a_204_47# TE VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hd__einvp_2.spice b/cells/einvp/sky130_fd_sc_hd__einvp_2.spice
index afa33b6..a8bb6c5 100644
--- a/cells/einvp/sky130_fd_sc_hd__einvp_2.spice
+++ b/cells/einvp/sky130_fd_sc_hd__einvp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvp_2 A TE VGND VNB VPB VPWR Z
 M1000 VGND TE a_204_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_204_47# TE VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hd__einvp_4.spice b/cells/einvp/sky130_fd_sc_hd__einvp_4.spice
index a5a5289..60a9874 100644
--- a/cells/einvp/sky130_fd_sc_hd__einvp_4.spice
+++ b/cells/einvp/sky130_fd_sc_hd__einvp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvp_4 A TE VGND VNB VPB VPWR Z
 M1000 a_215_309# a_27_47# VPWR VPB phighvt w=940000u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_193_47# A Z VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hd__einvp_8.spice b/cells/einvp/sky130_fd_sc_hd__einvp_8.spice
index e042035..123a8b2 100644
--- a/cells/einvp/sky130_fd_sc_hd__einvp_8.spice
+++ b/cells/einvp/sky130_fd_sc_hd__einvp_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__einvp_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__einvp_8 A TE VGND VNB VPB VPWR Z
 M1000 a_215_309# a_27_47# VPWR VPB phighvt w=940000u l=150000u
@@ -70,4 +85,3 @@
 M1033 Z A a_193_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fa/sky130_fd_sc_hd__fa_1.spice b/cells/fa/sky130_fd_sc_hd__fa_1.spice
index d6834ae..9040b09 100644
--- a/cells/fa/sky130_fd_sc_hd__fa_1.spice
+++ b/cells/fa/sky130_fd_sc_hd__fa_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fa_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fa_1 A B CIN VGND VNB VPB VPWR COUT SUM
 M1000 a_382_47# B VGND VNB nshort w=420000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_1163_413# B a_1091_413# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fa/sky130_fd_sc_hd__fa_2.spice b/cells/fa/sky130_fd_sc_hd__fa_2.spice
index 621fd8d..7b2d99b 100644
--- a/cells/fa/sky130_fd_sc_hd__fa_2.spice
+++ b/cells/fa/sky130_fd_sc_hd__fa_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fa_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fa_2 A B CIN VGND VNB VPB VPWR COUT SUM
 M1000 a_473_371# CIN a_80_21# VPB phighvt w=630000u l=150000u
@@ -66,4 +81,3 @@
 M1031 VGND a_1086_47# SUM VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fa/sky130_fd_sc_hd__fa_4.spice b/cells/fa/sky130_fd_sc_hd__fa_4.spice
index 0ac4161..9dbc43b 100644
--- a/cells/fa/sky130_fd_sc_hd__fa_4.spice
+++ b/cells/fa/sky130_fd_sc_hd__fa_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fa_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fa_4 A B CIN VGND VNB VPB VPWR COUT SUM
 M1000 a_1014_47# B VGND VNB nshort w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_1014_47# A VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fah/sky130_fd_sc_hd__fah_1.spice b/cells/fah/sky130_fd_sc_hd__fah_1.spice
index caec65f..ff1e07f 100644
--- a/cells/fah/sky130_fd_sc_hd__fah_1.spice
+++ b/cells/fah/sky130_fd_sc_hd__fah_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fah_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fah_1 A B CI VGND VNB VPB VPWR COUT SUM
 M1000 a_508_297# B VGND VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_67_199# A VGND VNB nshort w=640000u l=150000u
 +  ad=1.664e+11p pd=1.8e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/fahcin/sky130_fd_sc_hd__fahcin_1.spice b/cells/fahcin/sky130_fd_sc_hd__fahcin_1.spice
index 98502d9..b44a211 100644
--- a/cells/fahcin/sky130_fd_sc_hd__fahcin_1.spice
+++ b/cells/fahcin/sky130_fd_sc_hd__fahcin_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fahcin_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fahcin_1 A B CIN VGND VNB VPB VPWR COUT SUM
 M1000 a_1647_49# a_721_47# a_1636_315# VPB phighvt w=840000u l=150000u
@@ -66,4 +81,3 @@
 M1031 COUT a_434_49# a_1251_49# VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fahcon/sky130_fd_sc_hd__fahcon_1.spice b/cells/fahcon/sky130_fd_sc_hd__fahcon_1.spice
index 8a50dac..4c72b54 100644
--- a/cells/fahcon/sky130_fd_sc_hd__fahcon_1.spice
+++ b/cells/fahcon/sky130_fd_sc_hd__fahcon_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fahcon_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fahcon_1 A B CI VGND VNB VPB VPWR COUT_N SUM
 M1000 VPWR B a_488_21# VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_28_47# B a_726_47# VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hd__fill_1.spice b/cells/fill/sky130_fd_sc_hd__fill_1.spice
index c58430e..da34353 100644
--- a/cells/fill/sky130_fd_sc_hd__fill_1.spice
+++ b/cells/fill/sky130_fd_sc_hd__fill_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fill_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fill_1 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hd__fill_2.spice b/cells/fill/sky130_fd_sc_hd__fill_2.spice
index d62254e..0681722 100644
--- a/cells/fill/sky130_fd_sc_hd__fill_2.spice
+++ b/cells/fill/sky130_fd_sc_hd__fill_2.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fill_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fill_2 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hd__fill_4.spice b/cells/fill/sky130_fd_sc_hd__fill_4.spice
index f67e88a..618c903 100644
--- a/cells/fill/sky130_fd_sc_hd__fill_4.spice
+++ b/cells/fill/sky130_fd_sc_hd__fill_4.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fill_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fill_4 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hd__fill_8.spice b/cells/fill/sky130_fd_sc_hd__fill_8.spice
index d5d1463..3ed5f3c 100644
--- a/cells/fill/sky130_fd_sc_hd__fill_8.spice
+++ b/cells/fill/sky130_fd_sc_hd__fill_8.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__fill_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__fill_8 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/ha/sky130_fd_sc_hd__ha_1.spice b/cells/ha/sky130_fd_sc_hd__ha_1.spice
index eeb66de..0d3c296 100644
--- a/cells/ha/sky130_fd_sc_hd__ha_1.spice
+++ b/cells/ha/sky130_fd_sc_hd__ha_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ha_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ha_1 A B VGND VNB VPB VPWR COUT SUM
 M1000 VPWR A a_250_199# VPB phighvt w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 COUT a_250_199# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/ha/sky130_fd_sc_hd__ha_2.spice b/cells/ha/sky130_fd_sc_hd__ha_2.spice
index 07a18da..799fbb9 100644
--- a/cells/ha/sky130_fd_sc_hd__ha_2.spice
+++ b/cells/ha/sky130_fd_sc_hd__ha_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ha_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ha_2 A B VGND VNB VPB VPWR COUT SUM
 M1000 COUT a_342_199# VPWR VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_389_47# A VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/ha/sky130_fd_sc_hd__ha_4.spice b/cells/ha/sky130_fd_sc_hd__ha_4.spice
index 68366b3..44b559f 100644
--- a/cells/ha/sky130_fd_sc_hd__ha_4.spice
+++ b/cells/ha/sky130_fd_sc_hd__ha_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__ha_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__ha_4 A B VGND VNB VPB VPWR COUT SUM
 M1000 a_1325_47# B a_514_199# VNB nshort w=650000u l=150000u
@@ -74,4 +89,3 @@
 M1035 VPWR a_514_199# COUT VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_1.spice b/cells/inv/sky130_fd_sc_hd__inv_1.spice
index 1a28260..a5a6bc3 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_1.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_1 A VGND VNB VPB VPWR Y
 M1000 Y A VGND VNB nshort w=650000u l=150000u
@@ -6,4 +21,3 @@
 M1001 Y A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=2.6e+11p ps=2.52e+06u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_12.spice b/cells/inv/sky130_fd_sc_hd__inv_12.spice
index ec15f43..d5f16c9 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_12.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_12.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_12 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_16.spice b/cells/inv/sky130_fd_sc_hd__inv_16.spice
index d30d209..7728edc 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_16.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_16 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_2.spice b/cells/inv/sky130_fd_sc_hd__inv_2.spice
index 200bffb..01b238d 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_2.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_2 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -10,4 +25,3 @@
 M1003 VGND A Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_4.spice b/cells/inv/sky130_fd_sc_hd__inv_4.spice
index e81fda2..72b0d85 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_4.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_4 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_6.spice b/cells/inv/sky130_fd_sc_hd__inv_6.spice
index 96ba17c..0121f0e 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_6.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_6.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_6 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 Y A VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hd__inv_8.spice b/cells/inv/sky130_fd_sc_hd__inv_8.spice
index 2412030..b5e3f6d 100644
--- a/cells/inv/sky130_fd_sc_hd__inv_8.spice
+++ b/cells/inv/sky130_fd_sc_hd__inv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__inv_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__inv_8 A VGND VNB VPB VPWR Y
 M1000 Y A VGND VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_bleeder/sky130_fd_sc_hd__lpflow_bleeder_1.spice b/cells/lpflow_bleeder/sky130_fd_sc_hd__lpflow_bleeder_1.spice
index 0e0136c..9a2e0b9 100644
--- a/cells/lpflow_bleeder/sky130_fd_sc_hd__lpflow_bleeder_1.spice
+++ b/cells/lpflow_bleeder/sky130_fd_sc_hd__lpflow_bleeder_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_bleeder_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_bleeder_1 SHORT VGND VNB VPB VPWR
 M1000 a_147_105# SHORT VGND VNB nshort w=360000u l=150000u
@@ -12,4 +27,3 @@
 M1004 a_219_105# SHORT a_147_105# VNB nshort w=360000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_1.spice b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_1.spice
index a022817..c0e6936 100644
--- a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_1.spice
+++ b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkbufkapwr_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkbufkapwr_1 A KAPWR VGND VNB VPB VPWR X
 M1000 KAPWR a_75_212# X VPB phighvt w=790000u l=150000u
@@ -10,4 +25,3 @@
 M1003 VGND a_75_212# X VNB nshort w=520000u l=150000u
 +  ad=0p pd=0u as=1.352e+11p ps=1.56e+06u
 .ends
-
diff --git a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_16.spice b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_16.spice
index f7b681e..9527782 100644
--- a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_16.spice
+++ b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkbufkapwr_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkbufkapwr_16 A KAPWR VGND VNB VPB VPWR X
 M1000 X a_110_47# KAPWR VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_110_47# A VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_2.spice b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_2.spice
index 1d043f3..0812709 100644
--- a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_2.spice
+++ b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkbufkapwr_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkbufkapwr_2 A KAPWR VGND VNB VPB VPWR X
 M1000 X a_27_47# KAPWR VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 KAPWR a_27_47# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_4.spice b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_4.spice
index 0782f6e..d56e2c5 100644
--- a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_4.spice
+++ b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkbufkapwr_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkbufkapwr_4 A KAPWR VGND VNB VPB VPWR X
 M1000 X a_27_47# VGND VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_27_47# KAPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_8.spice b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_8.spice
index eb9fa29..0e2cbc4 100644
--- a/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_8.spice
+++ b/cells/lpflow_clkbufkapwr/sky130_fd_sc_hd__lpflow_clkbufkapwr_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkbufkapwr_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkbufkapwr_8 A KAPWR VGND VNB VPB VPWR X
 M1000 X a_110_47# KAPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 X a_110_47# VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_1.spice b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_1.spice
index 8e3459a..604a4f3 100644
--- a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_1.spice
+++ b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkinvkapwr_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkinvkapwr_1 A KAPWR VGND VNB VPB VPWR Y
 M1000 KAPWR A Y VPB phighvt w=840000u l=150000u
@@ -8,4 +23,3 @@
 M1002 VGND A Y VNB nshort w=420000u l=150000u
 +  ad=1.197e+11p pd=1.41e+06u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_16.spice b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_16.spice
index b3484e5..3fa4cdd 100644
--- a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_16.spice
+++ b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkinvkapwr_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkinvkapwr_16 A KAPWR VGND VNB VPB VPWR Y
 M1000 KAPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 KAPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_2.spice b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_2.spice
index f18ab50..fcdfa12 100644
--- a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_2.spice
+++ b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkinvkapwr_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkinvkapwr_2 A KAPWR VGND VNB VPB VPWR Y
 M1000 KAPWR A Y VPB phighvt w=1e+06u l=150000u
@@ -12,4 +27,3 @@
 M1004 VGND A Y VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_4.spice b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_4.spice
index 0a44f39..a83eacf 100644
--- a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_4.spice
+++ b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkinvkapwr_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkinvkapwr_4 A KAPWR VGND VNB VPB VPWR Y
 M1000 Y A KAPWR VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 Y A VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_8.spice b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_8.spice
index f3989d0..ea11182 100644
--- a/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_8.spice
+++ b/cells/lpflow_clkinvkapwr/sky130_fd_sc_hd__lpflow_clkinvkapwr_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_clkinvkapwr_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_clkinvkapwr_8 A KAPWR VGND VNB VPB VPWR Y
 M1000 Y A KAPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 KAPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_12.spice b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_12.spice
index 75cce95..515fdba 100644
--- a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_12.spice
+++ b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_decapkapwr_12.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_decapkapwr_12 KAPWR VGND VNB VPB VPWR
 M1000 KAPWR VGND KAPWR VPB phighvt w=870000u l=4.73e+06u
@@ -6,4 +21,3 @@
 M1001 VGND KAPWR VGND VNB nshort w=550000u l=4.73e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_3.spice b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_3.spice
index 8caeed4..6b1d508 100644
--- a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_3.spice
+++ b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_3.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_decapkapwr_3.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_decapkapwr_3 KAPWR VGND VNB VPB VPWR
 M1000 KAPWR VGND KAPWR VPB phighvt w=870000u l=590000u
@@ -6,4 +21,3 @@
 M1001 VGND KAPWR VGND VNB nshort w=550000u l=590000u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_4.spice b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_4.spice
index cd6eee4..756fec8 100644
--- a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_4.spice
+++ b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_decapkapwr_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_decapkapwr_4 KAPWR VGND VNB VPB VPWR
 M1000 KAPWR VGND KAPWR VPB phighvt w=870000u l=1.05e+06u
@@ -6,4 +21,3 @@
 M1001 VGND KAPWR VGND VNB nshort w=550000u l=1.05e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_6.spice b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_6.spice
index 3c40c4d..8d7f05f 100644
--- a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_6.spice
+++ b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_decapkapwr_6.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_decapkapwr_6 KAPWR VGND VNB VPB VPWR
 M1000 KAPWR VGND KAPWR VPB phighvt w=870000u l=1.97e+06u
@@ -6,4 +21,3 @@
 M1001 VGND KAPWR VGND VNB nshort w=550000u l=1.97e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_8.spice b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_8.spice
index c6bb05d..322d3af 100644
--- a/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_8.spice
+++ b/cells/lpflow_decapkapwr/sky130_fd_sc_hd__lpflow_decapkapwr_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_decapkapwr_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_decapkapwr_8 KAPWR VGND VNB VPB VPWR
 M1000 KAPWR VGND KAPWR VPB phighvt w=870000u l=2.89e+06u
@@ -6,4 +21,3 @@
 M1001 VGND KAPWR VGND VNB nshort w=550000u l=2.89e+06u
 +  ad=2.86e+11p pd=3.24e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_inputiso0n/sky130_fd_sc_hd__lpflow_inputiso0n_1.spice b/cells/lpflow_inputiso0n/sky130_fd_sc_hd__lpflow_inputiso0n_1.spice
index 4656e22..03c6ec0 100644
--- a/cells/lpflow_inputiso0n/sky130_fd_sc_hd__lpflow_inputiso0n_1.spice
+++ b/cells/lpflow_inputiso0n/sky130_fd_sc_hd__lpflow_inputiso0n_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_inputiso0n_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_inputiso0n_1 A SLEEP_B VGND VNB VPB VPWR X
 M1000 a_59_75# A VPWR VPB phighvt w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 VPWR SLEEP_B a_59_75# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_inputiso0p/sky130_fd_sc_hd__lpflow_inputiso0p_1.spice b/cells/lpflow_inputiso0p/sky130_fd_sc_hd__lpflow_inputiso0p_1.spice
index 3c3b157..22eea7a 100644
--- a/cells/lpflow_inputiso0p/sky130_fd_sc_hd__lpflow_inputiso0p_1.spice
+++ b/cells/lpflow_inputiso0p/sky130_fd_sc_hd__lpflow_inputiso0p_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_inputiso0p_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_inputiso0p_1 A SLEEP VGND VNB VPB VPWR X
 M1000 VPWR A a_207_413# VPB phighvt w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_27_413# SLEEP VGND VNB nshort w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_inputiso1n/sky130_fd_sc_hd__lpflow_inputiso1n_1.spice b/cells/lpflow_inputiso1n/sky130_fd_sc_hd__lpflow_inputiso1n_1.spice
index 1b42c53..b79f3a7 100644
--- a/cells/lpflow_inputiso1n/sky130_fd_sc_hd__lpflow_inputiso1n_1.spice
+++ b/cells/lpflow_inputiso1n/sky130_fd_sc_hd__lpflow_inputiso1n_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_inputiso1n_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_inputiso1n_1 A SLEEP_B VGND VNB VPB VPWR X
 M1000 X a_219_297# VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_27_53# SLEEP_B VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.176e+11p pd=1.4e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_inputiso1p/sky130_fd_sc_hd__lpflow_inputiso1p_1.spice b/cells/lpflow_inputiso1p/sky130_fd_sc_hd__lpflow_inputiso1p_1.spice
index 5410edb..111bdbf 100644
--- a/cells/lpflow_inputiso1p/sky130_fd_sc_hd__lpflow_inputiso1p_1.spice
+++ b/cells/lpflow_inputiso1p/sky130_fd_sc_hd__lpflow_inputiso1p_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_inputiso1p_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_inputiso1p_1 A SLEEP VGND VNB VPB VPWR X
 M1000 VGND SLEEP a_68_297# VNB nshort w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 X a_68_297# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=3.4e+11p pd=2.68e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_inputisolatch/sky130_fd_sc_hd__lpflow_inputisolatch_1.spice b/cells/lpflow_inputisolatch/sky130_fd_sc_hd__lpflow_inputisolatch_1.spice
index ea7a1a7..e982214 100644
--- a/cells/lpflow_inputisolatch/sky130_fd_sc_hd__lpflow_inputisolatch_1.spice
+++ b/cells/lpflow_inputisolatch/sky130_fd_sc_hd__lpflow_inputisolatch_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_inputisolatch_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_inputisolatch_1 D SLEEP_B VGND VNB VPB VPWR Q
 M1000 Q a_476_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND SLEEP_B a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_1.spice b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_1.spice
index 65000ac..38b450a 100644
--- a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_1.spice
+++ b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_isobufsrc_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_isobufsrc_1 A SLEEP VGND VNB VPB VPWR X
 M1000 a_265_297# SLEEP VPWR VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 VPWR A a_74_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_16.spice b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_16.spice
index 11ce927..910e654 100644
--- a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_16.spice
+++ b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_isobufsrc_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_isobufsrc_16 A SLEEP VGND VNB VPB VPWR X
 M1000 VPWR a_143_297# a_505_297# VPB phighvt w=1e+06u l=150000u
@@ -146,4 +161,3 @@
 M1071 a_505_297# SLEEP X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_2.spice b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_2.spice
index 536211c..b173c72 100644
--- a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_2.spice
+++ b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_isobufsrc_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_isobufsrc_2 A SLEEP VGND VNB VPB VPWR X
 M1000 VGND A a_251_21# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A a_251_21# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_4.spice b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_4.spice
index a4abfa1..a218c39 100644
--- a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_4.spice
+++ b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_isobufsrc_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_isobufsrc_4 A SLEEP VGND VNB VPB VPWR X
 M1000 a_27_297# a_419_21# X VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_27_297# SLEEP VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_8.spice b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_8.spice
index 5159ff1..9c3e407 100644
--- a/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_8.spice
+++ b/cells/lpflow_isobufsrc/sky130_fd_sc_hd__lpflow_isobufsrc_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_isobufsrc_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_isobufsrc_8 A SLEEP VGND VNB VPB VPWR X
 M1000 a_321_297# a_123_297# VPWR VPB phighvt w=1e+06u l=150000u
@@ -74,4 +89,3 @@
 M1035 X a_123_297# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_isobufsrckapwr/sky130_fd_sc_hd__lpflow_isobufsrckapwr_16.spice b/cells/lpflow_isobufsrckapwr/sky130_fd_sc_hd__lpflow_isobufsrckapwr_16.spice
index d18afa6..1c4490e 100644
--- a/cells/lpflow_isobufsrckapwr/sky130_fd_sc_hd__lpflow_isobufsrckapwr_16.spice
+++ b/cells/lpflow_isobufsrckapwr/sky130_fd_sc_hd__lpflow_isobufsrckapwr_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_isobufsrckapwr_16.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_isobufsrckapwr_16 A SLEEP KAPWR VGND VNB VPB VPWR
 + X
@@ -119,4 +134,3 @@
 M1057 X a_1122_47# VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1.spice b/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1.spice
index 5fda908..1b33e16 100644
--- a/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1.spice
+++ b/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1 A VGND VPB VPWRIN VPWR X
 M1000 X a_1028_32# VPWR VPB phighvt w=790000u l=150000u
@@ -34,4 +49,3 @@
 M1015 VPWR a_714_58# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2.spice b/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2.spice
index 5ec5797..42b3ca2 100644
--- a/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2.spice
+++ b/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2 A VGND VPB VPWRIN VPWR X
 M1000 VPWR a_620_911# a_714_47# VPB phighvt w=790000u l=150000u
@@ -38,4 +53,3 @@
 M1017 VPWR a_714_47# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4.spice b/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4.spice
index de62be9..c77b5e6 100644
--- a/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4.spice
+++ b/cells/lpflow_lsbuf_lh_hl_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4 A VGND VPB VPWRIN VPWR X
 M1000 VPWR a_620_911# a_714_47# VPB phighvt w=790000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VPWR a_714_47# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_isowell/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4.spice b/cells/lpflow_lsbuf_lh_isowell/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4.spice
index 481d545..7c2699c 100644
--- a/cells/lpflow_lsbuf_lh_isowell/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4.spice
+++ b/cells/lpflow_lsbuf_lh_isowell/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4 A LOWLVPWR VGND VNB VPB VPWR X
 M1000 VPWR a_620_911# a_714_47# VPB phighvt w=790000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VPWR a_714_47# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1.spice b/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1.spice
index 93bb05f..c4d17c5 100644
--- a/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1.spice
+++ b/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1 A LOWLVPWR VGND VPB VPWR X
 M1000 X a_1028_32# VPWR VPB phighvt w=790000u l=150000u
@@ -34,4 +49,3 @@
 M1015 VPWR a_714_58# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2.spice b/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2.spice
index 6b6198d..96cd928 100644
--- a/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2.spice
+++ b/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2 A LOWLVPWR VGND VPB VPWR X
 M1000 VPWR a_620_911# a_714_47# VPB phighvt w=790000u l=150000u
@@ -38,4 +53,3 @@
 M1017 VPWR a_714_47# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4.spice b/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4.spice
index c2d3faf..b22985d 100644
--- a/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4.spice
+++ b/cells/lpflow_lsbuf_lh_isowell_tap/sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4 A LOWLVPWR VGND VPB VPWR X
 M1000 VPWR a_620_911# a_714_47# VPB phighvt w=790000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VPWR a_714_47# a_620_911# VPB phighvt w=790000u l=150000u
 +  ad=0p pd=0u as=2.1725e+11p ps=2.13e+06u
 .ends
-
diff --git a/cells/macro_sparecell/sky130_fd_sc_hd__macro_sparecell.spice b/cells/macro_sparecell/sky130_fd_sc_hd__macro_sparecell.spice
index 1a2d0fd..7b56782 100644
--- a/cells/macro_sparecell/sky130_fd_sc_hd__macro_sparecell.spice
+++ b/cells/macro_sparecell/sky130_fd_sc_hd__macro_sparecell.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__macro_sparecell.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2_2 Y A B VPB VNB VGND VPWR
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,7 +33,6 @@
 M1007 VGND B a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
 .subckt sky130_fd_sc_hd__inv_2 A Y VPB VNB VPWR VGND
 M1000 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=5.2e+11p pd=5.04e+06u as=2.7e+11p ps=2.54e+06u
@@ -29,7 +43,6 @@
 M1003 VGND A Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
 .subckt sky130_fd_sc_hd__nor2_2 B Y A VPB VNB VGND VPWR
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=150000u
 +  ad=2.7e+11p pd=2.54e+06u as=8.1e+11p ps=7.62e+06u
@@ -48,12 +61,10 @@
 M1007 a_27_297# A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
 .subckt sky130_fd_sc_hd__conb_1 LO HI VPB VNB VGND VPWR
 R0 VGND LO short w=480000u l=45000u
 R1 HI VPWR short w=480000u l=45000u
 .ends
-
 .subckt sky130_fd_sc_hd__macro_sparecell VGND VNB VPB VPWR LO
 Xsky130_fd_sc_hd__nand2_2_1 sky130_fd_sc_hd__nor2_2_1/B LO LO VPB VNB VGND VPWR sky130_fd_sc_hd__nand2_2
 Xsky130_fd_sc_hd__nand2_2_0 sky130_fd_sc_hd__nor2_2_0/A LO LO VPB VNB VGND VPWR sky130_fd_sc_hd__nand2_2
@@ -67,4 +78,3 @@
 + sky130_fd_sc_hd__nor2_2_1/B VPB VNB VGND VPWR sky130_fd_sc_hd__nor2_2
 Xsky130_fd_sc_hd__conb_1_0 LO sky130_fd_sc_hd__conb_1_0/HI VPB VNB VGND VPWR sky130_fd_sc_hd__conb_1
 .ends
-
diff --git a/cells/maj3/sky130_fd_sc_hd__maj3_1.spice b/cells/maj3/sky130_fd_sc_hd__maj3_1.spice
index cd1ae19..a20ce6f 100644
--- a/cells/maj3/sky130_fd_sc_hd__maj3_1.spice
+++ b/cells/maj3/sky130_fd_sc_hd__maj3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__maj3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__maj3_1 A B C VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_109_47# C a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/maj3/sky130_fd_sc_hd__maj3_2.spice b/cells/maj3/sky130_fd_sc_hd__maj3_2.spice
index 139e302..3080714 100644
--- a/cells/maj3/sky130_fd_sc_hd__maj3_2.spice
+++ b/cells/maj3/sky130_fd_sc_hd__maj3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__maj3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__maj3_2 A B C VGND VNB VPB VPWR X
 M1000 a_441_47# B a_47_47# VNB nshort w=420000u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND a_47_47# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/maj3/sky130_fd_sc_hd__maj3_4.spice b/cells/maj3/sky130_fd_sc_hd__maj3_4.spice
index b2d11ac..f61c537 100644
--- a/cells/maj3/sky130_fd_sc_hd__maj3_4.spice
+++ b/cells/maj3/sky130_fd_sc_hd__maj3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__maj3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__maj3_4 A B C VGND VNB VPB VPWR X
 M1000 VPWR a_47_297# X VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_482_297# B a_47_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hd__mux2_1.spice b/cells/mux2/sky130_fd_sc_hd__mux2_1.spice
index bdf5211..0444009 100644
--- a/cells/mux2/sky130_fd_sc_hd__mux2_1.spice
+++ b/cells/mux2/sky130_fd_sc_hd__mux2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2_1 A0 A1 S VGND VNB VPB VPWR X
 M1000 VGND a_505_21# a_439_47# VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_439_47# A0 a_76_199# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hd__mux2_2.spice b/cells/mux2/sky130_fd_sc_hd__mux2_2.spice
index 94b20be..ff26446 100644
--- a/cells/mux2/sky130_fd_sc_hd__mux2_2.spice
+++ b/cells/mux2/sky130_fd_sc_hd__mux2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2_2 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_257_199# S VPWR VPB phighvt w=640000u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_257_199# S VGND VNB nshort w=420000u l=150000u
 +  ad=1.134e+11p pd=1.38e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hd__mux2_4.spice b/cells/mux2/sky130_fd_sc_hd__mux2_4.spice
index bdc8dd6..6898e8d 100644
--- a/cells/mux2/sky130_fd_sc_hd__mux2_4.spice
+++ b/cells/mux2/sky130_fd_sc_hd__mux2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2_4 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_204_297# a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 VGND S a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hd__mux2_8.spice b/cells/mux2/sky130_fd_sc_hd__mux2_8.spice
index cfe6f87..b0ed862 100644
--- a/cells/mux2/sky130_fd_sc_hd__mux2_8.spice
+++ b/cells/mux2/sky130_fd_sc_hd__mux2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2_8 A0 A1 S VGND VNB VPB VPWR X
 M1000 X a_79_21# VPWR VPB phighvt w=1e+06u l=150000u
@@ -70,4 +85,3 @@
 M1033 VPWR S a_792_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2i/sky130_fd_sc_hd__mux2i_1.spice b/cells/mux2i/sky130_fd_sc_hd__mux2i_1.spice
index 4b69662..a4030c5 100644
--- a/cells/mux2i/sky130_fd_sc_hd__mux2i_1.spice
+++ b/cells/mux2i/sky130_fd_sc_hd__mux2i_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2i_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2i_1 A0 A1 S VGND VNB VPB VPWR Y
 M1000 VPWR S a_283_205# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND a_283_205# a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2i/sky130_fd_sc_hd__mux2i_2.spice b/cells/mux2i/sky130_fd_sc_hd__mux2i_2.spice
index b3fc6e7..5cb42d8 100644
--- a/cells/mux2i/sky130_fd_sc_hd__mux2i_2.spice
+++ b/cells/mux2i/sky130_fd_sc_hd__mux2i_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2i_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2i_2 A0 A1 S VGND VNB VPB VPWR Y
 M1000 VPWR S a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_193_47# A1 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2i/sky130_fd_sc_hd__mux2i_4.spice b/cells/mux2i/sky130_fd_sc_hd__mux2i_4.spice
index 05cdef6..b3cbdfb 100644
--- a/cells/mux2i/sky130_fd_sc_hd__mux2i_4.spice
+++ b/cells/mux2i/sky130_fd_sc_hd__mux2i_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux2i_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux2i_4 A0 A1 S VGND VNB VPB VPWR Y
 M1000 a_445_297# A1 Y VPB phighvt w=1e+06u l=150000u
@@ -70,4 +85,3 @@
 M1033 a_109_47# A0 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux4/sky130_fd_sc_hd__mux4_1.spice b/cells/mux4/sky130_fd_sc_hd__mux4_1.spice
index 0acc306..029dfe0 100644
--- a/cells/mux4/sky130_fd_sc_hd__mux4_1.spice
+++ b/cells/mux4/sky130_fd_sc_hd__mux4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux4_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux4_1 A0 A1 A2 A3 S0 S1 VGND VNB VPB VPWR X
 M1000 a_750_97# S0 a_757_363# VPB phighvt w=420000u l=150000u
@@ -54,4 +69,3 @@
 M1025 a_193_413# A0 VPWR VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux4/sky130_fd_sc_hd__mux4_2.spice b/cells/mux4/sky130_fd_sc_hd__mux4_2.spice
index 1a82915..152ae41 100644
--- a/cells/mux4/sky130_fd_sc_hd__mux4_2.spice
+++ b/cells/mux4/sky130_fd_sc_hd__mux4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux4_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux4_2 A0 A1 A2 A3 S0 S1 VGND VNB VPB VPWR X
 M1000 a_193_369# A2 VPWR VPB phighvt w=640000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_1064_47# A1 VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux4/sky130_fd_sc_hd__mux4_4.spice b/cells/mux4/sky130_fd_sc_hd__mux4_4.spice
index 4819ad7..6a40297 100644
--- a/cells/mux4/sky130_fd_sc_hd__mux4_4.spice
+++ b/cells/mux4/sky130_fd_sc_hd__mux4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__mux4_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__mux4_4 A0 A1 A2 A3 S0 S1 VGND VNB VPB VPWR X
 M1000 a_1061_369# A1 VPWR VPB phighvt w=640000u l=150000u
@@ -66,4 +81,3 @@
 M1031 X a_789_316# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hd__nand2_1.spice b/cells/nand2/sky130_fd_sc_hd__nand2_1.spice
index bf538d9..e1c235e 100644
--- a/cells/nand2/sky130_fd_sc_hd__nand2_1.spice
+++ b/cells/nand2/sky130_fd_sc_hd__nand2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2_1 A B VGND VNB VPB VPWR Y
 M1000 Y B VPWR VPB phighvt w=1e+06u l=150000u
@@ -10,4 +25,3 @@
 M1003 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hd__nand2_2.spice b/cells/nand2/sky130_fd_sc_hd__nand2_2.spice
index fb8bfcf..871cfe0 100644
--- a/cells/nand2/sky130_fd_sc_hd__nand2_2.spice
+++ b/cells/nand2/sky130_fd_sc_hd__nand2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2_2 A B VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 VGND B a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hd__nand2_4.spice b/cells/nand2/sky130_fd_sc_hd__nand2_4.spice
index 2471c3b..d00b6de 100644
--- a/cells/nand2/sky130_fd_sc_hd__nand2_4.spice
+++ b/cells/nand2/sky130_fd_sc_hd__nand2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2_4 A B VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND B a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hd__nand2_8.spice b/cells/nand2/sky130_fd_sc_hd__nand2_8.spice
index 82c7899..93c0af7 100644
--- a/cells/nand2/sky130_fd_sc_hd__nand2_8.spice
+++ b/cells/nand2/sky130_fd_sc_hd__nand2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2_8 A B VGND VNB VPB VPWR Y
 M1000 a_27_47# A Y VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 Y A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2b/sky130_fd_sc_hd__nand2b_1.spice b/cells/nand2b/sky130_fd_sc_hd__nand2b_1.spice
index 7e92cdc..e2d96e8 100644
--- a/cells/nand2b/sky130_fd_sc_hd__nand2b_1.spice
+++ b/cells/nand2b/sky130_fd_sc_hd__nand2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2b_1 A_N B VGND VNB VPB VPWR Y
 M1000 Y a_27_93# a_206_47# VNB nshort w=650000u l=150000u
@@ -14,4 +29,3 @@
 M1005 VGND A_N a_27_93# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nand2b/sky130_fd_sc_hd__nand2b_2.spice b/cells/nand2b/sky130_fd_sc_hd__nand2b_2.spice
index 3a3782e..8193440 100644
--- a/cells/nand2b/sky130_fd_sc_hd__nand2b_2.spice
+++ b/cells/nand2b/sky130_fd_sc_hd__nand2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2b_2 A_N B VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A_N a_27_93# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nand2b/sky130_fd_sc_hd__nand2b_4.spice b/cells/nand2b/sky130_fd_sc_hd__nand2b_4.spice
index d65eeb1..7dd36ac 100644
--- a/cells/nand2b/sky130_fd_sc_hd__nand2b_4.spice
+++ b/cells/nand2b/sky130_fd_sc_hd__nand2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand2b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand2b_4 A_N B VGND VNB VPB VPWR Y
 M1000 Y a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 VGND A_N a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/nand3/sky130_fd_sc_hd__nand3_1.spice b/cells/nand3/sky130_fd_sc_hd__nand3_1.spice
index e337b9c..42b0b74 100644
--- a/cells/nand3/sky130_fd_sc_hd__nand3_1.spice
+++ b/cells/nand3/sky130_fd_sc_hd__nand3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand3_1 A B C VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 Y A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3/sky130_fd_sc_hd__nand3_2.spice b/cells/nand3/sky130_fd_sc_hd__nand3_2.spice
index 89d0351..d1cfbf1 100644
--- a/cells/nand3/sky130_fd_sc_hd__nand3_2.spice
+++ b/cells/nand3/sky130_fd_sc_hd__nand3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand3_2 A B C VGND VNB VPB VPWR Y
 M1000 Y B VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 Y A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3/sky130_fd_sc_hd__nand3_4.spice b/cells/nand3/sky130_fd_sc_hd__nand3_4.spice
index 07f898a..3e78282 100644
--- a/cells/nand3/sky130_fd_sc_hd__nand3_4.spice
+++ b/cells/nand3/sky130_fd_sc_hd__nand3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand3_4 A B C VGND VNB VPB VPWR Y
 M1000 Y B VPWR VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 VGND C a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3b/sky130_fd_sc_hd__nand3b_1.spice b/cells/nand3b/sky130_fd_sc_hd__nand3b_1.spice
index 16afe69..05e1da1 100644
--- a/cells/nand3b/sky130_fd_sc_hd__nand3b_1.spice
+++ b/cells/nand3b/sky130_fd_sc_hd__nand3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand3b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand3b_1 A_N B C VGND VNB VPB VPWR Y
 M1000 a_316_47# B a_232_47# VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 Y C VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3b/sky130_fd_sc_hd__nand3b_2.spice b/cells/nand3b/sky130_fd_sc_hd__nand3b_2.spice
index 250c78e..5af2cdd 100644
--- a/cells/nand3b/sky130_fd_sc_hd__nand3b_2.spice
+++ b/cells/nand3b/sky130_fd_sc_hd__nand3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand3b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand3b_2 A_N B C VGND VNB VPB VPWR Y
 M1000 a_218_47# B a_408_47# VNB nshort w=650000u l=150000u
@@ -30,4 +45,3 @@
 M1013 VGND A_N a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nand3b/sky130_fd_sc_hd__nand3b_4.spice b/cells/nand3b/sky130_fd_sc_hd__nand3b_4.spice
index 3b0c077..704d196 100644
--- a/cells/nand3b/sky130_fd_sc_hd__nand3b_4.spice
+++ b/cells/nand3b/sky130_fd_sc_hd__nand3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand3b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand3b_4 A_N B C VGND VNB VPB VPWR Y
 M1000 VGND C a_633_47# VNB nshort w=650000u l=150000u
@@ -54,4 +69,3 @@
 M1025 a_633_47# C VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4/sky130_fd_sc_hd__nand4_1.spice b/cells/nand4/sky130_fd_sc_hd__nand4_1.spice
index ba709a5..26f5905 100644
--- a/cells/nand4/sky130_fd_sc_hd__nand4_1.spice
+++ b/cells/nand4/sky130_fd_sc_hd__nand4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4_1 A B C D VGND VNB VPB VPWR Y
 M1000 Y B VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_109_47# D VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/nand4/sky130_fd_sc_hd__nand4_2.spice b/cells/nand4/sky130_fd_sc_hd__nand4_2.spice
index 4802bd8..8db3557 100644
--- a/cells/nand4/sky130_fd_sc_hd__nand4_2.spice
+++ b/cells/nand4/sky130_fd_sc_hd__nand4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4_2 A B C D VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_471_47# A Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4/sky130_fd_sc_hd__nand4_4.spice b/cells/nand4/sky130_fd_sc_hd__nand4_4.spice
index 463ce99..86a8fc6 100644
--- a/cells/nand4/sky130_fd_sc_hd__nand4_4.spice
+++ b/cells/nand4/sky130_fd_sc_hd__nand4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4_4 A B C D VGND VNB VPB VPWR Y
 M1000 Y C VPWR VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 VPWR A Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4b/sky130_fd_sc_hd__nand4b_1.spice b/cells/nand4b/sky130_fd_sc_hd__nand4b_1.spice
index d83fc8d..e58db64 100644
--- a/cells/nand4b/sky130_fd_sc_hd__nand4b_1.spice
+++ b/cells/nand4b/sky130_fd_sc_hd__nand4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4b_1 A_N B C D VGND VNB VPB VPWR Y
 M1000 a_316_47# C a_232_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A_N a_41_93# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.113e+11p ps=1.37e+06u
 .ends
-
diff --git a/cells/nand4b/sky130_fd_sc_hd__nand4b_2.spice b/cells/nand4b/sky130_fd_sc_hd__nand4b_2.spice
index f3bde9f..442b8ae 100644
--- a/cells/nand4b/sky130_fd_sc_hd__nand4b_2.spice
+++ b/cells/nand4b/sky130_fd_sc_hd__nand4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4b_2 A_N B C D VGND VNB VPB VPWR Y
 M1000 Y a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 VGND A_N a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nand4b/sky130_fd_sc_hd__nand4b_4.spice b/cells/nand4b/sky130_fd_sc_hd__nand4b_4.spice
index 417f905..3369181 100644
--- a/cells/nand4b/sky130_fd_sc_hd__nand4b_4.spice
+++ b/cells/nand4b/sky130_fd_sc_hd__nand4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4b_4 A_N B C D VGND VNB VPB VPWR Y
 M1000 a_991_47# C a_633_47# VNB nshort w=650000u l=150000u
@@ -70,4 +85,3 @@
 M1033 a_633_47# C a_991_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4bb/sky130_fd_sc_hd__nand4bb_1.spice b/cells/nand4bb/sky130_fd_sc_hd__nand4bb_1.spice
index b478c64..9bb74a0 100644
--- a/cells/nand4bb/sky130_fd_sc_hd__nand4bb_1.spice
+++ b/cells/nand4bb/sky130_fd_sc_hd__nand4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4bb_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4bb_1 A_N B_N C D VGND VNB VPB VPWR Y
 M1000 VPWR C Y VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND B_N a_27_93# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nand4bb/sky130_fd_sc_hd__nand4bb_2.spice b/cells/nand4bb/sky130_fd_sc_hd__nand4bb_2.spice
index 45a04ef..a67d65a 100644
--- a/cells/nand4bb/sky130_fd_sc_hd__nand4bb_2.spice
+++ b/cells/nand4bb/sky130_fd_sc_hd__nand4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4bb_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4bb_2 A_N B_N C D VGND VNB VPB VPWR Y
 M1000 VPWR a_27_47# Y VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_193_47# A_N VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.974e+11p pd=1.78e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4bb/sky130_fd_sc_hd__nand4bb_4.spice b/cells/nand4bb/sky130_fd_sc_hd__nand4bb_4.spice
index ec3c8f4..207fbb2 100644
--- a/cells/nand4bb/sky130_fd_sc_hd__nand4bb_4.spice
+++ b/cells/nand4bb/sky130_fd_sc_hd__nand4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nand4bb_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nand4bb_4 A_N B_N C D VGND VNB VPB VPWR Y
 M1000 VPWR a_193_47# Y VPB phighvt w=1e+06u l=150000u
@@ -74,4 +89,3 @@
 M1035 VPWR D Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hd__nor2_1.spice b/cells/nor2/sky130_fd_sc_hd__nor2_1.spice
index fde8882..8b152fc 100644
--- a/cells/nor2/sky130_fd_sc_hd__nor2_1.spice
+++ b/cells/nor2/sky130_fd_sc_hd__nor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2_1 A B VGND VNB VPB VPWR Y
 M1000 VPWR A a_109_297# VPB phighvt w=1e+06u l=150000u
@@ -10,4 +25,3 @@
 M1003 Y B VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hd__nor2_2.spice b/cells/nor2/sky130_fd_sc_hd__nor2_2.spice
index cdc77cb..9c2ffd0 100644
--- a/cells/nor2/sky130_fd_sc_hd__nor2_2.spice
+++ b/cells/nor2/sky130_fd_sc_hd__nor2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2_2 A B VGND VNB VPB VPWR Y
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_27_297# A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hd__nor2_4.spice b/cells/nor2/sky130_fd_sc_hd__nor2_4.spice
index 94a1620..21ef6c9 100644
--- a/cells/nor2/sky130_fd_sc_hd__nor2_4.spice
+++ b/cells/nor2/sky130_fd_sc_hd__nor2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2_4 A B VGND VNB VPB VPWR Y
 M1000 a_27_297# B Y VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_27_297# A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hd__nor2_8.spice b/cells/nor2/sky130_fd_sc_hd__nor2_8.spice
index 247eb16..d2a5110 100644
--- a/cells/nor2/sky130_fd_sc_hd__nor2_8.spice
+++ b/cells/nor2/sky130_fd_sc_hd__nor2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2_8 A B VGND VNB VPB VPWR Y
 M1000 Y B a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 Y B a_27_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2b/sky130_fd_sc_hd__nor2b_1.spice b/cells/nor2b/sky130_fd_sc_hd__nor2b_1.spice
index 82200d5..9e44623 100644
--- a/cells/nor2b/sky130_fd_sc_hd__nor2b_1.spice
+++ b/cells/nor2b/sky130_fd_sc_hd__nor2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2b_1 A B_N VGND VNB VPB VPWR Y
 M1000 a_265_297# A VPWR VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 VPWR B_N a_74_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nor2b/sky130_fd_sc_hd__nor2b_2.spice b/cells/nor2b/sky130_fd_sc_hd__nor2b_2.spice
index 0520503..b9d5a75 100644
--- a/cells/nor2b/sky130_fd_sc_hd__nor2b_2.spice
+++ b/cells/nor2b/sky130_fd_sc_hd__nor2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2b_2 A B_N VGND VNB VPB VPWR Y
 M1000 VGND B_N a_251_21# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR B_N a_251_21# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nor2b/sky130_fd_sc_hd__nor2b_4.spice b/cells/nor2b/sky130_fd_sc_hd__nor2b_4.spice
index 6c9f8ea..4b46526 100644
--- a/cells/nor2b/sky130_fd_sc_hd__nor2b_4.spice
+++ b/cells/nor2b/sky130_fd_sc_hd__nor2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor2b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor2b_4 A B_N VGND VNB VPB VPWR Y
 M1000 a_27_297# a_419_21# Y VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_27_297# A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hd__nor3_1.spice b/cells/nor3/sky130_fd_sc_hd__nor3_1.spice
index 92441b3..b13639c 100644
--- a/cells/nor3/sky130_fd_sc_hd__nor3_1.spice
+++ b/cells/nor3/sky130_fd_sc_hd__nor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor3_1 A B C VGND VNB VPB VPWR Y
 M1000 VPWR A a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 VGND C Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hd__nor3_2.spice b/cells/nor3/sky130_fd_sc_hd__nor3_2.spice
index fd2a12a..3a3876f 100644
--- a/cells/nor3/sky130_fd_sc_hd__nor3_2.spice
+++ b/cells/nor3/sky130_fd_sc_hd__nor3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor3_2 A B C VGND VNB VPB VPWR Y
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 Y C VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hd__nor3_4.spice b/cells/nor3/sky130_fd_sc_hd__nor3_4.spice
index cc754ac..93b1f96 100644
--- a/cells/nor3/sky130_fd_sc_hd__nor3_4.spice
+++ b/cells/nor3/sky130_fd_sc_hd__nor3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor3_4 A B C VGND VNB VPB VPWR Y
 M1000 a_27_297# B a_449_297# VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_449_297# C Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3b/sky130_fd_sc_hd__nor3b_1.spice b/cells/nor3b/sky130_fd_sc_hd__nor3b_1.spice
index a0f9f1a..a34f0e4 100644
--- a/cells/nor3b/sky130_fd_sc_hd__nor3b_1.spice
+++ b/cells/nor3b/sky130_fd_sc_hd__nor3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor3b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor3b_1 A B C_N VGND VNB VPB VPWR Y
 M1000 Y B VGND VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 VGND A Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3b/sky130_fd_sc_hd__nor3b_2.spice b/cells/nor3b/sky130_fd_sc_hd__nor3b_2.spice
index 6558ee9..d384a4a 100644
--- a/cells/nor3b/sky130_fd_sc_hd__nor3b_2.spice
+++ b/cells/nor3b/sky130_fd_sc_hd__nor3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor3b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor3b_2 A B C_N VGND VNB VPB VPWR Y
 M1000 a_281_297# a_531_21# Y VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VPWR C_N a_531_21# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nor3b/sky130_fd_sc_hd__nor3b_4.spice b/cells/nor3b/sky130_fd_sc_hd__nor3b_4.spice
index 53386b8..0c4f747 100644
--- a/cells/nor3b/sky130_fd_sc_hd__nor3b_4.spice
+++ b/cells/nor3b/sky130_fd_sc_hd__nor3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor3b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor3b_4 A B C_N VGND VNB VPB VPWR Y
 M1000 a_197_297# B a_555_297# VPB phighvt w=1e+06u l=150000u
@@ -54,4 +69,3 @@
 M1025 VGND B Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hd__nor4_1.spice b/cells/nor4/sky130_fd_sc_hd__nor4_1.spice
index f2c7742..e98563a 100644
--- a/cells/nor4/sky130_fd_sc_hd__nor4_1.spice
+++ b/cells/nor4/sky130_fd_sc_hd__nor4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4_1 A B C D VGND VNB VPB VPWR Y
 M1000 a_297_297# B a_191_297# VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 Y D VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hd__nor4_2.spice b/cells/nor4/sky130_fd_sc_hd__nor4_2.spice
index 195c588..b0d8232 100644
--- a/cells/nor4/sky130_fd_sc_hd__nor4_2.spice
+++ b/cells/nor4/sky130_fd_sc_hd__nor4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4_2 A B C D VGND VNB VPB VPWR Y
 M1000 a_475_297# C a_281_297# VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_27_297# A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hd__nor4_4.spice b/cells/nor4/sky130_fd_sc_hd__nor4_4.spice
index 69ac924..de8ae54 100644
--- a/cells/nor4/sky130_fd_sc_hd__nor4_4.spice
+++ b/cells/nor4/sky130_fd_sc_hd__nor4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4_4 A B C D VGND VNB VPB VPWR Y
 M1000 Y D VGND VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 Y D a_807_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4b/sky130_fd_sc_hd__nor4b_1.spice b/cells/nor4b/sky130_fd_sc_hd__nor4b_1.spice
index 2e539b3..8d4bc5b 100644
--- a/cells/nor4b/sky130_fd_sc_hd__nor4b_1.spice
+++ b/cells/nor4b/sky130_fd_sc_hd__nor4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4b_1 A B C D_N VGND VNB VPB VPWR Y
 M1000 VGND A Y VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_91_199# D_N VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4b/sky130_fd_sc_hd__nor4b_2.spice b/cells/nor4b/sky130_fd_sc_hd__nor4b_2.spice
index 518d187..f30fa69 100644
--- a/cells/nor4b/sky130_fd_sc_hd__nor4b_2.spice
+++ b/cells/nor4b/sky130_fd_sc_hd__nor4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4b_2 A B C D_N VGND VNB VPB VPWR Y
 M1000 a_474_297# a_694_21# Y VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 VGND D_N a_694_21# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/nor4b/sky130_fd_sc_hd__nor4b_4.spice b/cells/nor4b/sky130_fd_sc_hd__nor4b_4.spice
index 6a989de..1b4de8a 100644
--- a/cells/nor4b/sky130_fd_sc_hd__nor4b_4.spice
+++ b/cells/nor4b/sky130_fd_sc_hd__nor4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4b_4 A B C D_N VGND VNB VPB VPWR Y
 M1000 a_445_297# B a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -70,4 +85,3 @@
 M1033 Y A VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4bb/sky130_fd_sc_hd__nor4bb_1.spice b/cells/nor4bb/sky130_fd_sc_hd__nor4bb_1.spice
index 4f5d3f3..009e238 100644
--- a/cells/nor4bb/sky130_fd_sc_hd__nor4bb_1.spice
+++ b/cells/nor4bb/sky130_fd_sc_hd__nor4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4bb_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4bb_1 A B C_N D_N VGND VNB VPB VPWR Y
 M1000 VPWR A a_573_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_205_93# D_N VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.085e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4bb/sky130_fd_sc_hd__nor4bb_2.spice b/cells/nor4bb/sky130_fd_sc_hd__nor4bb_2.spice
index 7c6400f..c062aea 100644
--- a/cells/nor4bb/sky130_fd_sc_hd__nor4bb_2.spice
+++ b/cells/nor4bb/sky130_fd_sc_hd__nor4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4bb_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4bb_2 A B C_N D_N VGND VNB VPB VPWR Y
 M1000 VGND B Y VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_336_297# a_201_93# a_418_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4bb/sky130_fd_sc_hd__nor4bb_4.spice b/cells/nor4bb/sky130_fd_sc_hd__nor4bb_4.spice
index 0f12f57..af24960 100644
--- a/cells/nor4bb/sky130_fd_sc_hd__nor4bb_4.spice
+++ b/cells/nor4bb/sky130_fd_sc_hd__nor4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__nor4bb_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__nor4bb_4 A B C_N D_N VGND VNB VPB VPWR Y
 M1000 a_311_297# a_27_297# a_729_297# VPB phighvt w=1e+06u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_197_47# D_N VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.8e+11p pd=2.56e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/o2111a/sky130_fd_sc_hd__o2111a_1.spice b/cells/o2111a/sky130_fd_sc_hd__o2111a_1.spice
index 271e784..1dff5a2 100644
--- a/cells/o2111a/sky130_fd_sc_hd__o2111a_1.spice
+++ b/cells/o2111a/sky130_fd_sc_hd__o2111a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2111a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2111a_1 A1 A2 B1 C1 D1 VGND VNB VPB VPWR X
 M1000 a_676_297# A2 a_79_21# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_79_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/o2111a/sky130_fd_sc_hd__o2111a_2.spice b/cells/o2111a/sky130_fd_sc_hd__o2111a_2.spice
index e387700..01e6a14 100644
--- a/cells/o2111a/sky130_fd_sc_hd__o2111a_2.spice
+++ b/cells/o2111a/sky130_fd_sc_hd__o2111a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2111a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2111a_2 A1 A2 B1 C1 D1 VGND VNB VPB VPWR X
 M1000 a_674_297# A2 a_80_21# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_566_47# B1 a_458_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2111a/sky130_fd_sc_hd__o2111a_4.spice b/cells/o2111a/sky130_fd_sc_hd__o2111a_4.spice
index 792fdfd..56c6750 100644
--- a/cells/o2111a/sky130_fd_sc_hd__o2111a_4.spice
+++ b/cells/o2111a/sky130_fd_sc_hd__o2111a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2111a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2111a_4 A1 A2 B1 C1 D1 VGND VNB VPB VPWR X
 M1000 VPWR C1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 X a_27_297# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2111ai/sky130_fd_sc_hd__o2111ai_1.spice b/cells/o2111ai/sky130_fd_sc_hd__o2111ai_1.spice
index 0de0836..1e5a60e 100644
--- a/cells/o2111ai/sky130_fd_sc_hd__o2111ai_1.spice
+++ b/cells/o2111ai/sky130_fd_sc_hd__o2111ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2111ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2111ai_1 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 a_343_47# A1 VGND VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A2 a_343_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2111ai/sky130_fd_sc_hd__o2111ai_2.spice b/cells/o2111ai/sky130_fd_sc_hd__o2111ai_2.spice
index 88251b1..39f5ae5 100644
--- a/cells/o2111ai/sky130_fd_sc_hd__o2111ai_2.spice
+++ b/cells/o2111ai/sky130_fd_sc_hd__o2111ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2111ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2111ai_2 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 Y C1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_298_47# B1 a_497_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2111ai/sky130_fd_sc_hd__o2111ai_4.spice b/cells/o2111ai/sky130_fd_sc_hd__o2111ai_4.spice
index 87bacee..21e079b 100644
--- a/cells/o2111ai/sky130_fd_sc_hd__o2111ai_4.spice
+++ b/cells/o2111ai/sky130_fd_sc_hd__o2111ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2111ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2111ai_4 A1 A2 B1 C1 D1 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_1163_297# VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 Y D1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211a/sky130_fd_sc_hd__o211a_1.spice b/cells/o211a/sky130_fd_sc_hd__o211a_1.spice
index 70f2235..d903396 100644
--- a/cells/o211a/sky130_fd_sc_hd__o211a_1.spice
+++ b/cells/o211a/sky130_fd_sc_hd__o211a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o211a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o211a_1 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_297_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND a_79_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/o211a/sky130_fd_sc_hd__o211a_2.spice b/cells/o211a/sky130_fd_sc_hd__o211a_2.spice
index 34dfa0f..05a8131 100644
--- a/cells/o211a/sky130_fd_sc_hd__o211a_2.spice
+++ b/cells/o211a/sky130_fd_sc_hd__o211a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o211a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o211a_2 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_182_47# B1 a_110_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_27_47# B1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211a/sky130_fd_sc_hd__o211a_4.spice b/cells/o211a/sky130_fd_sc_hd__o211a_4.spice
index 892e585..e6092cb 100644
--- a/cells/o211a/sky130_fd_sc_hd__o211a_4.spice
+++ b/cells/o211a/sky130_fd_sc_hd__o211a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o211a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o211a_4 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_474_47# B1 a_748_47# VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_1122_297# A2 a_79_21# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211ai/sky130_fd_sc_hd__o211ai_1.spice b/cells/o211ai/sky130_fd_sc_hd__o211ai_1.spice
index deddcc6..4b2a6ad 100644
--- a/cells/o211ai/sky130_fd_sc_hd__o211ai_1.spice
+++ b/cells/o211ai/sky130_fd_sc_hd__o211ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o211ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o211ai_1 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 Y C1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 Y C1 a_326_47# VNB nshort w=650000u l=150000u
 +  ad=3.9325e+11p pd=2.51e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/o211ai/sky130_fd_sc_hd__o211ai_2.spice b/cells/o211ai/sky130_fd_sc_hd__o211ai_2.spice
index 2872202..330138b 100644
--- a/cells/o211ai/sky130_fd_sc_hd__o211ai_2.spice
+++ b/cells/o211ai/sky130_fd_sc_hd__o211ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o211ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o211ai_2 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_487_297# A2 Y VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_487_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211ai/sky130_fd_sc_hd__o211ai_4.spice b/cells/o211ai/sky130_fd_sc_hd__o211ai_4.spice
index ed28249..564e405 100644
--- a/cells/o211ai/sky130_fd_sc_hd__o211ai_4.spice
+++ b/cells/o211ai/sky130_fd_sc_hd__o211ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o211ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o211ai_4 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 VPWR C1 Y VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 VGND A1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hd__o21a_1.spice b/cells/o21a/sky130_fd_sc_hd__o21a_1.spice
index 583b0df..731ec0e 100644
--- a/cells/o21a/sky130_fd_sc_hd__o21a_1.spice
+++ b/cells/o21a/sky130_fd_sc_hd__o21a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21a_1 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VPWR a_79_21# X VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 VGND a_79_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hd__o21a_2.spice b/cells/o21a/sky130_fd_sc_hd__o21a_2.spice
index 6b8a96d..bcc1367 100644
--- a/cells/o21a/sky130_fd_sc_hd__o21a_2.spice
+++ b/cells/o21a/sky130_fd_sc_hd__o21a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21a_2 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VPWR A1 a_470_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_79_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hd__o21a_4.spice b/cells/o21a/sky130_fd_sc_hd__o21a_4.spice
index 3cd6cd6..3fbd0db 100644
--- a/cells/o21a/sky130_fd_sc_hd__o21a_4.spice
+++ b/cells/o21a/sky130_fd_sc_hd__o21a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21a_4 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VPWR a_80_21# X VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_475_47# B1 a_80_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hd__o21ai_0.spice b/cells/o21ai/sky130_fd_sc_hd__o21ai_0.spice
index f4d1a4a..d13c6d7 100644
--- a/cells/o21ai/sky130_fd_sc_hd__o21ai_0.spice
+++ b/cells/o21ai/sky130_fd_sc_hd__o21ai_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ai_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ai_0 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 VPWR B1 Y VPB phighvt w=640000u l=150000u
@@ -14,4 +29,3 @@
 M1005 VGND A1 a_32_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hd__o21ai_1.spice b/cells/o21ai/sky130_fd_sc_hd__o21ai_1.spice
index af546dd..102910d 100644
--- a/cells/o21ai/sky130_fd_sc_hd__o21ai_1.spice
+++ b/cells/o21ai/sky130_fd_sc_hd__o21ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ai_1 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 Y A2 a_109_297# VPB phighvt w=1e+06u l=150000u
@@ -14,4 +29,3 @@
 M1005 VGND A1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hd__o21ai_2.spice b/cells/o21ai/sky130_fd_sc_hd__o21ai_2.spice
index 559a621..4abebe1 100644
--- a/cells/o21ai/sky130_fd_sc_hd__o21ai_2.spice
+++ b/cells/o21ai/sky130_fd_sc_hd__o21ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ai_2 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_29_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND A1 a_29_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hd__o21ai_4.spice b/cells/o21ai/sky130_fd_sc_hd__o21ai_4.spice
index 4da0a14..962fc1d 100644
--- a/cells/o21ai/sky130_fd_sc_hd__o21ai_4.spice
+++ b/cells/o21ai/sky130_fd_sc_hd__o21ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ai_4 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 Y A2 a_115_297# VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 Y B1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ba/sky130_fd_sc_hd__o21ba_1.spice b/cells/o21ba/sky130_fd_sc_hd__o21ba_1.spice
index 94c08cc..8525213 100644
--- a/cells/o21ba/sky130_fd_sc_hd__o21ba_1.spice
+++ b/cells/o21ba/sky130_fd_sc_hd__o21ba_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ba_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ba_1 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 VGND A2 a_448_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_448_47# a_222_93# a_79_199# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.69e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/o21ba/sky130_fd_sc_hd__o21ba_2.spice b/cells/o21ba/sky130_fd_sc_hd__o21ba_2.spice
index 3da59c9..4e38eda 100644
--- a/cells/o21ba/sky130_fd_sc_hd__o21ba_2.spice
+++ b/cells/o21ba/sky130_fd_sc_hd__o21ba_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ba_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ba_2 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 a_574_297# A2 a_174_21# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 X a_174_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ba/sky130_fd_sc_hd__o21ba_4.spice b/cells/o21ba/sky130_fd_sc_hd__o21ba_4.spice
index 97eb2be..3631ff5 100644
--- a/cells/o21ba/sky130_fd_sc_hd__o21ba_4.spice
+++ b/cells/o21ba/sky130_fd_sc_hd__o21ba_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21ba_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21ba_4 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 VPWR a_27_297# a_187_21# VPB phighvt w=1e+06u l=150000u
@@ -46,4 +61,3 @@
 M1021 X a_187_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21bai/sky130_fd_sc_hd__o21bai_1.spice b/cells/o21bai/sky130_fd_sc_hd__o21bai_1.spice
index 185ba84..952f8bb 100644
--- a/cells/o21bai/sky130_fd_sc_hd__o21bai_1.spice
+++ b/cells/o21bai/sky130_fd_sc_hd__o21bai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21bai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21bai_1 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 Y a_105_352# VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_105_352# B1_N VGND VNB nshort w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/o21bai/sky130_fd_sc_hd__o21bai_2.spice b/cells/o21bai/sky130_fd_sc_hd__o21bai_2.spice
index 9a3a315..5d8080e 100644
--- a/cells/o21bai/sky130_fd_sc_hd__o21bai_2.spice
+++ b/cells/o21bai/sky130_fd_sc_hd__o21bai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21bai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21bai_2 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_397_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VGND A2 a_229_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21bai/sky130_fd_sc_hd__o21bai_4.spice b/cells/o21bai/sky130_fd_sc_hd__o21bai_4.spice
index d32a60b..f48444b 100644
--- a/cells/o21bai/sky130_fd_sc_hd__o21bai_4.spice
+++ b/cells/o21bai/sky130_fd_sc_hd__o21bai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o21bai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o21bai_4 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_561_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -54,4 +69,3 @@
 M1025 Y a_33_297# a_225_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221a/sky130_fd_sc_hd__o221a_1.spice b/cells/o221a/sky130_fd_sc_hd__o221a_1.spice
index 8ba867e..3c8d33c 100644
--- a/cells/o221a/sky130_fd_sc_hd__o221a_1.spice
+++ b/cells/o221a/sky130_fd_sc_hd__o221a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o221a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o221a_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 VPWR A1 a_512_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_149_47# C1 a_51_297# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=2.015e+11p ps=1.92e+06u
 .ends
-
diff --git a/cells/o221a/sky130_fd_sc_hd__o221a_2.spice b/cells/o221a/sky130_fd_sc_hd__o221a_2.spice
index d7cb785..debbfb6 100644
--- a/cells/o221a/sky130_fd_sc_hd__o221a_2.spice
+++ b/cells/o221a/sky130_fd_sc_hd__o221a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o221a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o221a_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 VPWR a_38_47# X VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VGND A1 a_225_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221a/sky130_fd_sc_hd__o221a_4.spice b/cells/o221a/sky130_fd_sc_hd__o221a_4.spice
index 33ef388..2f33438 100644
--- a/cells/o221a/sky130_fd_sc_hd__o221a_4.spice
+++ b/cells/o221a/sky130_fd_sc_hd__o221a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o221a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o221a_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 X a_109_47# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_109_47# C1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221ai/sky130_fd_sc_hd__o221ai_1.spice b/cells/o221ai/sky130_fd_sc_hd__o221ai_1.spice
index 70641fb..75f5ad0 100644
--- a/cells/o221ai/sky130_fd_sc_hd__o221ai_1.spice
+++ b/cells/o221ai/sky130_fd_sc_hd__o221ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o221ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o221ai_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_213_123# B2 a_109_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A1 a_493_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221ai/sky130_fd_sc_hd__o221ai_2.spice b/cells/o221ai/sky130_fd_sc_hd__o221ai_2.spice
index adb8395..c2ad0ab 100644
--- a/cells/o221ai/sky130_fd_sc_hd__o221ai_2.spice
+++ b/cells/o221ai/sky130_fd_sc_hd__o221ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o221ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o221ai_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_28_47# B2 a_300_47# VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_300_47# A2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221ai/sky130_fd_sc_hd__o221ai_4.spice b/cells/o221ai/sky130_fd_sc_hd__o221ai_4.spice
index c9e63af..51397ec 100644
--- a/cells/o221ai/sky130_fd_sc_hd__o221ai_4.spice
+++ b/cells/o221ai/sky130_fd_sc_hd__o221ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o221ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o221ai_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_471_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_1241_297# A2 Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hd__o22a_1.spice b/cells/o22a/sky130_fd_sc_hd__o22a_1.spice
index 880a223..ea15894 100644
--- a/cells/o22a/sky130_fd_sc_hd__o22a_1.spice
+++ b/cells/o22a/sky130_fd_sc_hd__o22a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o22a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o22a_1 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 VGND A2 a_215_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A1 a_493_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hd__o22a_2.spice b/cells/o22a/sky130_fd_sc_hd__o22a_2.spice
index 46e127c..372ac9d 100644
--- a/cells/o22a/sky130_fd_sc_hd__o22a_2.spice
+++ b/cells/o22a/sky130_fd_sc_hd__o22a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o22a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o22a_2 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 X a_81_21# VGND VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_81_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hd__o22a_4.spice b/cells/o22a/sky130_fd_sc_hd__o22a_4.spice
index 4b5c23d..98fb810 100644
--- a/cells/o22a/sky130_fd_sc_hd__o22a_4.spice
+++ b/cells/o22a/sky130_fd_sc_hd__o22a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o22a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o22a_4 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 X a_96_21# VGND VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_484_47# B1 a_96_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hd__o22ai_1.spice b/cells/o22ai/sky130_fd_sc_hd__o22ai_1.spice
index e6ef15a..88696fa 100644
--- a/cells/o22ai/sky130_fd_sc_hd__o22ai_1.spice
+++ b/cells/o22ai/sky130_fd_sc_hd__o22ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o22ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o22ai_1 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_307_297# A2 Y VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 Y B1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hd__o22ai_2.spice b/cells/o22ai/sky130_fd_sc_hd__o22ai_2.spice
index c95fd89..ab8e18f 100644
--- a/cells/o22ai/sky130_fd_sc_hd__o22ai_2.spice
+++ b/cells/o22ai/sky130_fd_sc_hd__o22ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o22ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o22ai_2 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_475_297# A2 Y VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_27_297# B1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hd__o22ai_4.spice b/cells/o22ai/sky130_fd_sc_hd__o22ai_4.spice
index 4b4e844..a7f3dff 100644
--- a/cells/o22ai/sky130_fd_sc_hd__o22ai_4.spice
+++ b/cells/o22ai/sky130_fd_sc_hd__o22ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o22ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o22ai_4 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y A2 a_115_297# VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_33_47# B2 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_1.spice b/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_1.spice
index 69b3c25..4984ab0 100644
--- a/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_1.spice
+++ b/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2bb2a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2bb2a_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 VGND B2 a_489_47# VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR A2_N a_206_369# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_2.spice b/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_2.spice
index e722a8b..cd3ab51 100644
--- a/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_2.spice
+++ b/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2bb2a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2bb2a_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 VGND a_84_21# X VNB nshort w=650000u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_581_47# a_295_369# a_84_21# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_4.spice b/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_4.spice
index e67e592..d50a357 100644
--- a/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_4.spice
+++ b/cells/o2bb2a/sky130_fd_sc_hd__o2bb2a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2bb2a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2bb2a_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 X a_193_297# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 VGND B1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_1.spice b/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_1.spice
index 60224bb..8e80196 100644
--- a/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_1.spice
+++ b/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2bb2ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2bb2ai_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_394_47# a_112_297# Y VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A2_N a_112_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_2.spice b/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_2.spice
index 8cab186..89fdf4d 100644
--- a/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_2.spice
+++ b/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2bb2ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2bb2ai_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 VPWR B1 a_730_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 Y a_113_297# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_4.spice b/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_4.spice
index cc4c62a..5da58be 100644
--- a/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_4.spice
+++ b/cells/o2bb2ai/sky130_fd_sc_hd__o2bb2ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o2bb2ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o2bb2ai_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_807_47# B1 VGND VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VGND B1 a_807_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311a/sky130_fd_sc_hd__o311a_1.spice b/cells/o311a/sky130_fd_sc_hd__o311a_1.spice
index fb0eb93..2240bc4 100644
--- a/cells/o311a/sky130_fd_sc_hd__o311a_1.spice
+++ b/cells/o311a/sky130_fd_sc_hd__o311a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311a_1 A1 A2 A3 B1 C1 VGND VNB VPB VPWR X
 M1000 a_81_21# C1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_81_21# A3 a_368_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311a/sky130_fd_sc_hd__o311a_2.spice b/cells/o311a/sky130_fd_sc_hd__o311a_2.spice
index 3cff796..19e2f04 100644
--- a/cells/o311a/sky130_fd_sc_hd__o311a_2.spice
+++ b/cells/o311a/sky130_fd_sc_hd__o311a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311a_2 A1 A2 A3 B1 C1 VGND VNB VPB VPWR X
 M1000 a_360_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_360_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311a/sky130_fd_sc_hd__o311a_4.spice b/cells/o311a/sky130_fd_sc_hd__o311a_4.spice
index 32a8f46..7dffb3f 100644
--- a/cells/o311a/sky130_fd_sc_hd__o311a_4.spice
+++ b/cells/o311a/sky130_fd_sc_hd__o311a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311a_4 A1 A2 A3 B1 C1 VGND VNB VPB VPWR X
 M1000 a_717_47# A3 VGND VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_717_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311ai/sky130_fd_sc_hd__o311ai_0.spice b/cells/o311ai/sky130_fd_sc_hd__o311ai_0.spice
index 3e74651..20c36e7 100644
--- a/cells/o311ai/sky130_fd_sc_hd__o311ai_0.spice
+++ b/cells/o311ai/sky130_fd_sc_hd__o311ai_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311ai_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311ai_0 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_138_47# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 Y A3 a_222_369# VPB phighvt w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311ai/sky130_fd_sc_hd__o311ai_1.spice b/cells/o311ai/sky130_fd_sc_hd__o311ai_1.spice
index cf28294..b03c538 100644
--- a/cells/o311ai/sky130_fd_sc_hd__o311ai_1.spice
+++ b/cells/o311ai/sky130_fd_sc_hd__o311ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311ai_1 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_138_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_138_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311ai/sky130_fd_sc_hd__o311ai_2.spice b/cells/o311ai/sky130_fd_sc_hd__o311ai_2.spice
index f56a325..83dc57e 100644
--- a/cells/o311ai/sky130_fd_sc_hd__o311ai_2.spice
+++ b/cells/o311ai/sky130_fd_sc_hd__o311ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311ai_2 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 Y A3 a_301_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_51_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o311ai/sky130_fd_sc_hd__o311ai_4.spice b/cells/o311ai/sky130_fd_sc_hd__o311ai_4.spice
index ca8ae75..27964b3 100644
--- a/cells/o311ai/sky130_fd_sc_hd__o311ai_4.spice
+++ b/cells/o311ai/sky130_fd_sc_hd__o311ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o311ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o311ai_4 A1 A2 A3 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_39_297# A2 a_461_297# VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR B1 Y VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31a/sky130_fd_sc_hd__o31a_1.spice b/cells/o31a/sky130_fd_sc_hd__o31a_1.spice
index 09dfe07..a7d2d98 100644
--- a/cells/o31a/sky130_fd_sc_hd__o31a_1.spice
+++ b/cells/o31a/sky130_fd_sc_hd__o31a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o31a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o31a_1 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 a_103_199# A3 a_337_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_103_199# B1 a_253_47# VNB nshort w=650000u l=150000u
 +  ad=2.015e+11p pd=1.92e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/o31a/sky130_fd_sc_hd__o31a_2.spice b/cells/o31a/sky130_fd_sc_hd__o31a_2.spice
index 9c31c54..729c534 100644
--- a/cells/o31a/sky130_fd_sc_hd__o31a_2.spice
+++ b/cells/o31a/sky130_fd_sc_hd__o31a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o31a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o31a_2 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 VPWR a_108_21# X VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 X a_108_21# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31a/sky130_fd_sc_hd__o31a_4.spice b/cells/o31a/sky130_fd_sc_hd__o31a_4.spice
index d0fe2f3..75e13ee 100644
--- a/cells/o31a/sky130_fd_sc_hd__o31a_4.spice
+++ b/cells/o31a/sky130_fd_sc_hd__o31a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o31a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o31a_4 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 a_102_21# A3 a_672_297# VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 VPWR a_102_21# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31ai/sky130_fd_sc_hd__o31ai_1.spice b/cells/o31ai/sky130_fd_sc_hd__o31ai_1.spice
index 977e440..4e689f1 100644
--- a/cells/o31ai/sky130_fd_sc_hd__o31ai_1.spice
+++ b/cells/o31ai/sky130_fd_sc_hd__o31ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o31ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o31ai_1 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 Y A3 a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_109_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31ai/sky130_fd_sc_hd__o31ai_2.spice b/cells/o31ai/sky130_fd_sc_hd__o31ai_2.spice
index 4b1e0f7..4ad3c30 100644
--- a/cells/o31ai/sky130_fd_sc_hd__o31ai_2.spice
+++ b/cells/o31ai/sky130_fd_sc_hd__o31ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o31ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o31ai_2 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VPWR B1 Y VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND A3 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31ai/sky130_fd_sc_hd__o31ai_4.spice b/cells/o31ai/sky130_fd_sc_hd__o31ai_4.spice
index cf59c39..08d006c 100644
--- a/cells/o31ai/sky130_fd_sc_hd__o31ai_4.spice
+++ b/cells/o31ai/sky130_fd_sc_hd__o31ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o31ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o31ai_4 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 Y B1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_27_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32a/sky130_fd_sc_hd__o32a_1.spice b/cells/o32a/sky130_fd_sc_hd__o32a_1.spice
index a6a008a..dbc53cf 100644
--- a/cells/o32a/sky130_fd_sc_hd__o32a_1.spice
+++ b/cells/o32a/sky130_fd_sc_hd__o32a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o32a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o32a_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 a_77_199# A3 a_323_297# VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_77_199# B2 a_227_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32a/sky130_fd_sc_hd__o32a_2.spice b/cells/o32a/sky130_fd_sc_hd__o32a_2.spice
index 67d5c66..1f60699 100644
--- a/cells/o32a/sky130_fd_sc_hd__o32a_2.spice
+++ b/cells/o32a/sky130_fd_sc_hd__o32a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o32a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o32a_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 a_79_21# A3 a_429_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_345_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32a/sky130_fd_sc_hd__o32a_4.spice b/cells/o32a/sky130_fd_sc_hd__o32a_4.spice
index b852bba..1f3b447 100644
--- a/cells/o32a/sky130_fd_sc_hd__o32a_4.spice
+++ b/cells/o32a/sky130_fd_sc_hd__o32a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o32a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o32a_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 X a_549_297# VGND VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 VGND A1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32ai/sky130_fd_sc_hd__o32ai_1.spice b/cells/o32ai/sky130_fd_sc_hd__o32ai_1.spice
index 323613c..ba17aea 100644
--- a/cells/o32ai/sky130_fd_sc_hd__o32ai_1.spice
+++ b/cells/o32ai/sky130_fd_sc_hd__o32ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o32ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o32ai_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_461_297# VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_27_47# B2 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32ai/sky130_fd_sc_hd__o32ai_2.spice b/cells/o32ai/sky130_fd_sc_hd__o32ai_2.spice
index 9ec89c2..91eea7b 100644
--- a/cells/o32ai/sky130_fd_sc_hd__o32ai_2.spice
+++ b/cells/o32ai/sky130_fd_sc_hd__o32ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o32ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o32ai_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 VPWR B1 a_27_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_27_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32ai/sky130_fd_sc_hd__o32ai_4.spice b/cells/o32ai/sky130_fd_sc_hd__o32ai_4.spice
index 2b0f4d4..acc0cd1 100644
--- a/cells/o32ai/sky130_fd_sc_hd__o32ai_4.spice
+++ b/cells/o32ai/sky130_fd_sc_hd__o32ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o32ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o32ai_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_806_297# A3 Y VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_1224_297# A2 a_806_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o41a/sky130_fd_sc_hd__o41a_1.spice b/cells/o41a/sky130_fd_sc_hd__o41a_1.spice
index 9f9f28e..0c2d230 100644
--- a/cells/o41a/sky130_fd_sc_hd__o41a_1.spice
+++ b/cells/o41a/sky130_fd_sc_hd__o41a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o41a_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o41a_1 A1 A2 A3 A4 B1 VGND VNB VPB VPWR X
 M1000 a_103_21# B1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_103_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=2.47e+11p ps=2.06e+06u
 .ends
-
diff --git a/cells/o41a/sky130_fd_sc_hd__o41a_2.spice b/cells/o41a/sky130_fd_sc_hd__o41a_2.spice
index 4fca13e..a782438 100644
--- a/cells/o41a/sky130_fd_sc_hd__o41a_2.spice
+++ b/cells/o41a/sky130_fd_sc_hd__o41a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o41a_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o41a_2 A1 A2 A3 A4 B1 VGND VNB VPB VPWR X
 M1000 VPWR A1 a_697_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_393_47# A3 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o41a/sky130_fd_sc_hd__o41a_4.spice b/cells/o41a/sky130_fd_sc_hd__o41a_4.spice
index ad02c77..05ee0fd 100644
--- a/cells/o41a/sky130_fd_sc_hd__o41a_4.spice
+++ b/cells/o41a/sky130_fd_sc_hd__o41a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o41a_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o41a_4 A1 A2 A3 A4 B1 VGND VNB VPB VPWR X
 M1000 a_467_47# A1 VGND VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_467_47# A2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o41ai/sky130_fd_sc_hd__o41ai_1.spice b/cells/o41ai/sky130_fd_sc_hd__o41ai_1.spice
index 17b585e..3a49ace 100644
--- a/cells/o41ai/sky130_fd_sc_hd__o41ai_1.spice
+++ b/cells/o41ai/sky130_fd_sc_hd__o41ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o41ai_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o41ai_1 A1 A2 A3 A4 B1 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_109_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_109_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o41ai/sky130_fd_sc_hd__o41ai_2.spice b/cells/o41ai/sky130_fd_sc_hd__o41ai_2.spice
index ba14784..ca77831 100644
--- a/cells/o41ai/sky130_fd_sc_hd__o41ai_2.spice
+++ b/cells/o41ai/sky130_fd_sc_hd__o41ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o41ai_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o41ai_2 A1 A2 A3 A4 B1 VGND VNB VPB VPWR Y
 M1000 a_743_297# A1 VPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 Y B1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o41ai/sky130_fd_sc_hd__o41ai_4.spice b/cells/o41ai/sky130_fd_sc_hd__o41ai_4.spice
index 2cea04f..b8a27e2 100644
--- a/cells/o41ai/sky130_fd_sc_hd__o41ai_4.spice
+++ b/cells/o41ai/sky130_fd_sc_hd__o41ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__o41ai_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__o41ai_4 A1 A2 A3 A4 B1 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_27_47# VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_1243_297# A2 a_885_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hd__or2_0.spice b/cells/or2/sky130_fd_sc_hd__or2_0.spice
index 196d94d..b668a68 100644
--- a/cells/or2/sky130_fd_sc_hd__or2_0.spice
+++ b/cells/or2/sky130_fd_sc_hd__or2_0.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2_0.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2_0 A B VGND VNB VPB VPWR X
 M1000 VGND A a_68_355# VNB nshort w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 a_150_355# B a_68_355# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hd__or2_1.spice b/cells/or2/sky130_fd_sc_hd__or2_1.spice
index 17ee602..f2521d3 100644
--- a/cells/or2/sky130_fd_sc_hd__or2_1.spice
+++ b/cells/or2/sky130_fd_sc_hd__or2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2_1 A B VGND VNB VPB VPWR X
 M1000 VGND A a_68_297# VNB nshort w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 X a_68_297# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=3.4e+11p pd=2.68e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hd__or2_2.spice b/cells/or2/sky130_fd_sc_hd__or2_2.spice
index 6aaa046..19be0f0 100644
--- a/cells/or2/sky130_fd_sc_hd__or2_2.spice
+++ b/cells/or2/sky130_fd_sc_hd__or2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2_2 A B VGND VNB VPB VPWR X
 M1000 X a_39_297# VGND VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_39_297# B VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hd__or2_4.spice b/cells/or2/sky130_fd_sc_hd__or2_4.spice
index 89234c5..86b0ec7 100644
--- a/cells/or2/sky130_fd_sc_hd__or2_4.spice
+++ b/cells/or2/sky130_fd_sc_hd__or2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2_4 A B VGND VNB VPB VPWR X
 M1000 X a_35_297# VPWR VPB phighvt w=1e+06u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_35_297# B VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2b/sky130_fd_sc_hd__or2b_1.spice b/cells/or2b/sky130_fd_sc_hd__or2b_1.spice
index 4167eba..fdfafdd 100644
--- a/cells/or2b/sky130_fd_sc_hd__or2b_1.spice
+++ b/cells/or2b/sky130_fd_sc_hd__or2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2b_1 A B_N VGND VNB VPB VPWR X
 M1000 X a_219_297# VPWR VPB phighvt w=1e+06u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_27_53# B_N VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.176e+11p pd=1.4e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or2b/sky130_fd_sc_hd__or2b_2.spice b/cells/or2b/sky130_fd_sc_hd__or2b_2.spice
index 323e0f1..6543064 100644
--- a/cells/or2b/sky130_fd_sc_hd__or2b_2.spice
+++ b/cells/or2b/sky130_fd_sc_hd__or2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2b_2 A B_N VGND VNB VPB VPWR X
 M1000 VPWR a_218_297# X VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND a_218_297# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2b/sky130_fd_sc_hd__or2b_4.spice b/cells/or2b/sky130_fd_sc_hd__or2b_4.spice
index b4e25f5..803b97d 100644
--- a/cells/or2b/sky130_fd_sc_hd__or2b_4.spice
+++ b/cells/or2b/sky130_fd_sc_hd__or2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or2b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or2b_4 A B_N VGND VNB VPB VPWR X
 M1000 X a_219_297# VPWR VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 VPWR a_219_297# X VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3/sky130_fd_sc_hd__or3_1.spice b/cells/or3/sky130_fd_sc_hd__or3_1.spice
index 2be78fa..2cde7a7 100644
--- a/cells/or3/sky130_fd_sc_hd__or3_1.spice
+++ b/cells/or3/sky130_fd_sc_hd__or3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or3_1 A B C VGND VNB VPB VPWR X
 M1000 a_29_53# B VGND VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR A a_183_297# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3/sky130_fd_sc_hd__or3_2.spice b/cells/or3/sky130_fd_sc_hd__or3_2.spice
index e217448..2776739 100644
--- a/cells/or3/sky130_fd_sc_hd__or3_2.spice
+++ b/cells/or3/sky130_fd_sc_hd__or3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or3_2 A B C VGND VNB VPB VPWR X
 M1000 VPWR a_30_53# X VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_30_53# B VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3/sky130_fd_sc_hd__or3_4.spice b/cells/or3/sky130_fd_sc_hd__or3_4.spice
index 574fa59..c2f36a1 100644
--- a/cells/or3/sky130_fd_sc_hd__or3_4.spice
+++ b/cells/or3/sky130_fd_sc_hd__or3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or3_4 A B C VGND VNB VPB VPWR X
 M1000 VPWR A a_193_297# VPB phighvt w=1e+06u l=150000u
@@ -30,4 +45,3 @@
 M1013 X a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3b/sky130_fd_sc_hd__or3b_1.spice b/cells/or3b/sky130_fd_sc_hd__or3b_1.spice
index 9f7c9e6..95e96af 100644
--- a/cells/or3b/sky130_fd_sc_hd__or3b_1.spice
+++ b/cells/or3b/sky130_fd_sc_hd__or3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or3b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or3b_1 A B C_N VGND VNB VPB VPWR X
 M1000 a_297_297# a_109_93# a_215_53# VPB phighvt w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_109_93# C_N VGND VNB nshort w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or3b/sky130_fd_sc_hd__or3b_2.spice b/cells/or3b/sky130_fd_sc_hd__or3b_2.spice
index 722273f..ca49151 100644
--- a/cells/or3b/sky130_fd_sc_hd__or3b_2.spice
+++ b/cells/or3b/sky130_fd_sc_hd__or3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or3b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or3b_2 A B C_N VGND VNB VPB VPWR X
 M1000 a_472_297# B a_388_297# VPB phighvt w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 X a_176_21# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3b/sky130_fd_sc_hd__or3b_4.spice b/cells/or3b/sky130_fd_sc_hd__or3b_4.spice
index 5091539..b5c6b0b 100644
--- a/cells/or3b/sky130_fd_sc_hd__or3b_4.spice
+++ b/cells/or3b/sky130_fd_sc_hd__or3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or3b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or3b_4 A B C_N VGND VNB VPB VPWR X
 M1000 a_542_297# A VPWR VPB phighvt w=1e+06u l=150000u
@@ -34,4 +49,3 @@
 M1015 X a_176_21# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4/sky130_fd_sc_hd__or4_1.spice b/cells/or4/sky130_fd_sc_hd__or4_1.spice
index 8de3f9c..1f950e9 100644
--- a/cells/or4/sky130_fd_sc_hd__or4_1.spice
+++ b/cells/or4/sky130_fd_sc_hd__or4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4_1 A B C D VGND VNB VPB VPWR X
 M1000 a_205_297# C a_109_297# VPB phighvt w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND C a_27_297# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4/sky130_fd_sc_hd__or4_2.spice b/cells/or4/sky130_fd_sc_hd__or4_2.spice
index f202589..fdf4ccf 100644
--- a/cells/or4/sky130_fd_sc_hd__or4_2.spice
+++ b/cells/or4/sky130_fd_sc_hd__or4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4_2 A B C D VGND VNB VPB VPWR X
 M1000 a_205_297# C a_109_297# VPB phighvt w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND C a_27_297# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4/sky130_fd_sc_hd__or4_4.spice b/cells/or4/sky130_fd_sc_hd__or4_4.spice
index b8f494b..e69b91d 100644
--- a/cells/or4/sky130_fd_sc_hd__or4_4.spice
+++ b/cells/or4/sky130_fd_sc_hd__or4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4_4 A B C D VGND VNB VPB VPWR X
 M1000 VGND A a_32_297# VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 X a_32_297# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4b/sky130_fd_sc_hd__or4b_1.spice b/cells/or4b/sky130_fd_sc_hd__or4b_1.spice
index 60a2c91..901bb57 100644
--- a/cells/or4b/sky130_fd_sc_hd__or4b_1.spice
+++ b/cells/or4b/sky130_fd_sc_hd__or4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4b_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4b_1 A B C D_N VGND VNB VPB VPWR X
 M1000 a_297_297# a_109_53# a_215_297# VPB phighvt w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR A a_465_297# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4b/sky130_fd_sc_hd__or4b_2.spice b/cells/or4b/sky130_fd_sc_hd__or4b_2.spice
index 4c54679..11d991e 100644
--- a/cells/or4b/sky130_fd_sc_hd__or4b_2.spice
+++ b/cells/or4b/sky130_fd_sc_hd__or4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4b_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4b_2 A B C D_N VGND VNB VPB VPWR X
 M1000 a_176_21# C VGND VNB nshort w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_555_297# C a_483_297# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4b/sky130_fd_sc_hd__or4b_4.spice b/cells/or4b/sky130_fd_sc_hd__or4b_4.spice
index c2a542e..edeb008 100644
--- a/cells/or4b/sky130_fd_sc_hd__or4b_4.spice
+++ b/cells/or4b/sky130_fd_sc_hd__or4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4b_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4b_4 A B C D_N VGND VNB VPB VPWR X
 M1000 VPWR a_215_297# X VPB phighvt w=1e+06u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_109_93# D_N VGND VNB nshort w=420000u l=150000u
 +  ad=1.0785e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or4bb/sky130_fd_sc_hd__or4bb_1.spice b/cells/or4bb/sky130_fd_sc_hd__or4bb_1.spice
index eade295..593c41f 100644
--- a/cells/or4bb/sky130_fd_sc_hd__or4bb_1.spice
+++ b/cells/or4bb/sky130_fd_sc_hd__or4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4bb_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4bb_1 A B C_N D_N VGND VNB VPB VPWR X
 M1000 X a_311_413# VGND VNB nshort w=650000u l=150000u
@@ -30,4 +45,3 @@
 M1013 a_205_93# D_N VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.176e+11p pd=1.4e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or4bb/sky130_fd_sc_hd__or4bb_2.spice b/cells/or4bb/sky130_fd_sc_hd__or4bb_2.spice
index 9fea344..7ee00c8 100644
--- a/cells/or4bb/sky130_fd_sc_hd__or4bb_2.spice
+++ b/cells/or4bb/sky130_fd_sc_hd__or4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4bb_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4bb_2 A B C_N D_N VGND VNB VPB VPWR X
 M1000 a_316_413# a_206_93# VGND VNB nshort w=420000u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_206_93# D_N VPWR VPB phighvt w=420000u l=150000u
 +  ad=1.176e+11p pd=1.4e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or4bb/sky130_fd_sc_hd__or4bb_4.spice b/cells/or4bb/sky130_fd_sc_hd__or4bb_4.spice
index 1ead467..4fa4da5 100644
--- a/cells/or4bb/sky130_fd_sc_hd__or4bb_4.spice
+++ b/cells/or4bb/sky130_fd_sc_hd__or4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__or4bb_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__or4bb_4 A B C_N D_N VGND VNB VPB VPWR X
 M1000 a_583_297# B a_499_297# VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 VPWR A a_583_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/probe_p/sky130_fd_sc_hd__probe_p_8.spice b/cells/probe_p/sky130_fd_sc_hd__probe_p_8.spice
index 2d48c1f..78c39df 100644
--- a/cells/probe_p/sky130_fd_sc_hd__probe_p_8.spice
+++ b/cells/probe_p/sky130_fd_sc_hd__probe_p_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__probe_p_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__probe_p_8 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VGND VNB nshort w=650000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VGND A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/probec_p/sky130_fd_sc_hd__probec_p_8.spice b/cells/probec_p/sky130_fd_sc_hd__probec_p_8.spice
index 023af21..9ef7bf6 100644
--- a/cells/probec_p/sky130_fd_sc_hd__probec_p_8.spice
+++ b/cells/probec_p/sky130_fd_sc_hd__probec_p_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__probec_p_8.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__probec_p_8 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VGND VNB nshort w=650000u l=150000u
@@ -46,4 +61,3 @@
 M1021 VGND A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_1.spice b/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_1.spice
index 485c5d3..a79d231 100644
--- a/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_1.spice
+++ b/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfbbn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfbbn_1 CLK_N D RESET_B SCD SCE SET_B VGND VNB VPB VPWR
 + Q Q_N
@@ -99,4 +114,3 @@
 M1047 a_1572_329# a_1102_21# VPWR VPB phighvt w=840000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_2.spice b/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_2.spice
index a77af46..2eb215a 100644
--- a/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_2.spice
+++ b/cells/sdfbbn/sky130_fd_sc_hd__sdfbbn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfbbn_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfbbn_2 CLK_N D RESET_B SCD SCE SET_B VGND VNB VPB VPWR
 + Q Q_N
@@ -107,4 +122,3 @@
 M1051 Q_N a_1888_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfbbp/sky130_fd_sc_hd__sdfbbp_1.spice b/cells/sdfbbp/sky130_fd_sc_hd__sdfbbp_1.spice
index 08a4a9a..8ed8297 100644
--- a/cells/sdfbbp/sky130_fd_sc_hd__sdfbbp_1.spice
+++ b/cells/sdfbbp/sky130_fd_sc_hd__sdfbbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfbbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfbbp_1 CLK D RESET_B SCD SCE SET_B VGND VNB VPB VPWR Q
 + Q_N
@@ -99,4 +114,3 @@
 M1047 a_1572_329# a_1107_21# VPWR VPB phighvt w=840000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_1.spice b/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_1.spice
index 1b516ae..5339ccf 100644
--- a/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_1.spice
+++ b/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfrbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfrbp_1 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1946_47# RESET_B VGND VNB nshort w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_193_47# a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.65e+11p pd=2.53e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_2.spice b/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_2.spice
index 97e1d6c..c53b8c3 100644
--- a/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_2.spice
+++ b/cells/sdfrbp/sky130_fd_sc_hd__sdfrbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfrbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfrbp_2 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1946_47# RESET_B VGND VNB nshort w=420000u l=150000u
@@ -90,4 +105,3 @@
 M1043 VPWR a_1767_21# Q VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtn/sky130_fd_sc_hd__sdfrtn_1.spice b/cells/sdfrtn/sky130_fd_sc_hd__sdfrtn_1.spice
index 95ac918..515f0a1 100644
--- a/cells/sdfrtn/sky130_fd_sc_hd__sdfrtn_1.spice
+++ b/cells/sdfrtn/sky130_fd_sc_hd__sdfrtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfrtn_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfrtn_1 CLK_N D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1946_47# RESET_B VGND VNB nshort w=420000u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_193_47# a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.65e+11p pd=2.53e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_1.spice b/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_1.spice
index 20e48e3..eede61a 100644
--- a/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_1.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfrtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfrtp_1 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1946_47# RESET_B VGND VNB nshort w=420000u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_193_47# a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.65e+11p pd=2.53e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_2.spice b/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_2.spice
index c77a967..584e4d6 100644
--- a/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_2.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfrtp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfrtp_2 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1946_47# RESET_B VGND VNB nshort w=420000u l=150000u
@@ -78,4 +93,3 @@
 M1037 a_193_47# a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.65e+11p pd=2.53e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_4.spice b/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_4.spice
index a516aa1..aaa9bda 100644
--- a/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_4.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hd__sdfrtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfrtp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfrtp_4 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1946_47# RESET_B VGND VNB nshort w=420000u l=150000u
@@ -86,4 +101,3 @@
 M1041 a_193_47# a_27_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.65e+11p pd=2.53e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_1.spice b/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_1.spice
index eeb7d1f..24f9d0f 100644
--- a/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_1.spice
+++ b/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfsbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfsbp_1 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q Q_N
 M1000 VGND CLK a_643_369# VNB nshort w=420000u l=150000u
@@ -86,4 +101,3 @@
 M1041 VGND SET_B a_1347_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_2.spice b/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_2.spice
index e9e048d..18bc5ca 100644
--- a/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_2.spice
+++ b/cells/sdfsbp/sky130_fd_sc_hd__sdfsbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfsbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfsbp_2 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_1781_295# a_1597_329# VGND VNB nshort w=420000u l=150000u
@@ -94,4 +109,3 @@
 M1045 a_818_47# a_652_47# VGND VNB nshort w=420000u l=150000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hd__sdfstp_1.spice b/cells/sdfstp/sky130_fd_sc_hd__sdfstp_1.spice
index ba7277e..99de841 100644
--- a/cells/sdfstp/sky130_fd_sc_hd__sdfstp_1.spice
+++ b/cells/sdfstp/sky130_fd_sc_hd__sdfstp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfstp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfstp_1 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VGND CLK a_643_369# VNB nshort w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 Q a_2227_47# VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=2.6e+11p pd=2.52e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hd__sdfstp_2.spice b/cells/sdfstp/sky130_fd_sc_hd__sdfstp_2.spice
index 10467c9..69b8acb 100644
--- a/cells/sdfstp/sky130_fd_sc_hd__sdfstp_2.spice
+++ b/cells/sdfstp/sky130_fd_sc_hd__sdfstp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfstp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfstp_2 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VGND CLK a_643_369# VNB nshort w=420000u l=150000u
@@ -86,4 +101,3 @@
 M1041 a_1597_329# a_809_369# a_1514_47# VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hd__sdfstp_4.spice b/cells/sdfstp/sky130_fd_sc_hd__sdfstp_4.spice
index d7a5255..fcc8d85 100644
--- a/cells/sdfstp/sky130_fd_sc_hd__sdfstp_4.spice
+++ b/cells/sdfstp/sky130_fd_sc_hd__sdfstp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfstp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfstp_4 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VGND CLK a_643_369# VNB nshort w=420000u l=150000u
@@ -94,4 +109,3 @@
 M1045 VPWR a_2227_47# Q VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_1.spice b/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_1.spice
index 1154658..8865865 100644
--- a/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_1.spice
+++ b/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfxbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfxbp_1 CLK D SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_1430_413# a_193_47# a_1346_413# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_2.spice b/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_2.spice
index cd6ceae..dc081d2 100644
--- a/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_2.spice
+++ b/cells/sdfxbp/sky130_fd_sc_hd__sdfxbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfxbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfxbp_2 CLK D SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1031_413# a_27_47# a_938_413# VPB phighvt w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VGND SCE a_299_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.176e+11p ps=1.4e+06u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_1.spice b/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_1.spice
index c743fc2..972530f 100644
--- a/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_1.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfxtp_1 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 Q a_1520_315# VGND VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 VGND SCE a_299_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.176e+11p ps=1.4e+06u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_2.spice b/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_2.spice
index bf610f9..04cb968 100644
--- a/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_2.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfxtp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfxtp_2 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1439_413# a_193_47# a_1355_413# VPB phighvt w=420000u l=150000u
@@ -70,4 +85,3 @@
 M1033 VPWR a_1526_315# Q VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_4.spice b/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_4.spice
index 2b8926c..13dd3ff 100644
--- a/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_4.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hd__sdfxtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdfxtp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdfxtp_4 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 a_940_413# a_193_47# a_560_369# VPB phighvt w=420000u l=150000u
@@ -78,4 +93,3 @@
 M1037 VPWR a_1356_413# a_1527_315# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=2.6e+11p ps=2.52e+06u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_1.spice b/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_1.spice
index b34646c..646df93 100644
--- a/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_1.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdlclkp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdlclkp_1 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_394_47# a_256_243# a_286_413# VNB nshort w=360000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_286_413# a_256_243# a_27_47# VPB phighvt w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_2.spice b/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_2.spice
index 44b3f10..d4b1d08 100644
--- a/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_2.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdlclkp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdlclkp_2 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_465_315# a_287_413# VPWR VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 VGND SCE a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_4.spice b/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_4.spice
index 5d664fb..6d66093 100644
--- a/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_4.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hd__sdlclkp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sdlclkp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sdlclkp_4 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_465_315# a_287_413# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 VGND SCE a_27_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_1.spice b/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_1.spice
index fea7400..fc5fdf0 100644
--- a/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_1.spice
+++ b/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sedfxbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sedfxbp_1 CLK D DE SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -90,4 +105,3 @@
 M1043 a_299_47# a_791_264# a_729_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_2.spice b/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_2.spice
index e18afcd..64c5d35 100644
--- a/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_2.spice
+++ b/cells/sedfxbp/sky130_fd_sc_hd__sedfxbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sedfxbp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sedfxbp_2 CLK D DE SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -98,4 +113,3 @@
 M1047 a_299_47# a_791_264# a_729_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_1.spice b/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_1.spice
index 1318882..df79672 100644
--- a/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_1.spice
+++ b/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sedfxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sedfxtp_1 CLK D DE SCD SCE VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -86,4 +101,3 @@
 M1041 a_299_47# a_791_264# a_729_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_2.spice b/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_2.spice
index 5328cc7..f959d06 100644
--- a/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_2.spice
+++ b/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sedfxtp_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sedfxtp_2 CLK D DE SCD SCE VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -90,4 +105,3 @@
 M1043 a_299_47# a_791_264# a_729_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_4.spice b/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_4.spice
index 1385b10..0101884 100644
--- a/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_4.spice
+++ b/cells/sedfxtp/sky130_fd_sc_hd__sedfxtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__sedfxtp_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__sedfxtp_4 CLK D DE SCD SCE VGND VNB VPB VPWR Q
 M1000 a_193_47# a_27_47# VPWR VPB phighvt w=640000u l=150000u
@@ -98,4 +113,3 @@
 M1047 a_299_47# a_791_264# a_729_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/tap/sky130_fd_sc_hd__tap_1.spice b/cells/tap/sky130_fd_sc_hd__tap_1.spice
index 161014e..97b1b9b 100644
--- a/cells/tap/sky130_fd_sc_hd__tap_1.spice
+++ b/cells/tap/sky130_fd_sc_hd__tap_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__tap_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__tap_1 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/tap/sky130_fd_sc_hd__tap_2.spice b/cells/tap/sky130_fd_sc_hd__tap_2.spice
index e3a4549..249200e 100644
--- a/cells/tap/sky130_fd_sc_hd__tap_2.spice
+++ b/cells/tap/sky130_fd_sc_hd__tap_2.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__tap_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__tap_2 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/tapvgnd/sky130_fd_sc_hd__tapvgnd_1.spice b/cells/tapvgnd/sky130_fd_sc_hd__tapvgnd_1.spice
index a44fe03..4728c86 100644
--- a/cells/tapvgnd/sky130_fd_sc_hd__tapvgnd_1.spice
+++ b/cells/tapvgnd/sky130_fd_sc_hd__tapvgnd_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__tapvgnd_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__tapvgnd_1 VGND VPB VPWR
 .ends
-
diff --git a/cells/tapvgnd2/sky130_fd_sc_hd__tapvgnd2_1.spice b/cells/tapvgnd2/sky130_fd_sc_hd__tapvgnd2_1.spice
index f4287f1..65141cb 100644
--- a/cells/tapvgnd2/sky130_fd_sc_hd__tapvgnd2_1.spice
+++ b/cells/tapvgnd2/sky130_fd_sc_hd__tapvgnd2_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__tapvgnd2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__tapvgnd2_1 VGND VPB VPWR
 .ends
-
diff --git a/cells/tapvpwrvgnd/sky130_fd_sc_hd__tapvpwrvgnd_1.spice b/cells/tapvpwrvgnd/sky130_fd_sc_hd__tapvpwrvgnd_1.spice
index 4f3c22b..136eed9 100644
--- a/cells/tapvpwrvgnd/sky130_fd_sc_hd__tapvpwrvgnd_1.spice
+++ b/cells/tapvpwrvgnd/sky130_fd_sc_hd__tapvpwrvgnd_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__tapvpwrvgnd_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__tapvpwrvgnd_1 VGND VPWR
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hd__xnor2_1.spice b/cells/xnor2/sky130_fd_sc_hd__xnor2_1.spice
index 71dbec9..1e1c07c 100644
--- a/cells/xnor2/sky130_fd_sc_hd__xnor2_1.spice
+++ b/cells/xnor2/sky130_fd_sc_hd__xnor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xnor2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xnor2_1 A B VGND VNB VPB VPWR Y
 M1000 VPWR a_47_47# Y VPB phighvt w=1e+06u l=150000u
@@ -22,4 +37,3 @@
 M1009 Y a_47_47# a_285_47# VNB nshort w=650000u l=150000u
 +  ad=1.95e+11p pd=1.9e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hd__xnor2_2.spice b/cells/xnor2/sky130_fd_sc_hd__xnor2_2.spice
index 21c9785..fb3d38e 100644
--- a/cells/xnor2/sky130_fd_sc_hd__xnor2_2.spice
+++ b/cells/xnor2/sky130_fd_sc_hd__xnor2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xnor2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xnor2_2 A B VGND VNB VPB VPWR Y
 M1000 Y a_27_297# a_560_47# VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND A a_560_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hd__xnor2_4.spice b/cells/xnor2/sky130_fd_sc_hd__xnor2_4.spice
index b918e9d..2ec5fd2 100644
--- a/cells/xnor2/sky130_fd_sc_hd__xnor2_4.spice
+++ b/cells/xnor2/sky130_fd_sc_hd__xnor2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xnor2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xnor2_4 A B VGND VNB VPB VPWR Y
 M1000 Y B a_820_297# VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_902_47# A VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor3/sky130_fd_sc_hd__xnor3_1.spice b/cells/xnor3/sky130_fd_sc_hd__xnor3_1.spice
index 006487e..5d86208 100644
--- a/cells/xnor3/sky130_fd_sc_hd__xnor3_1.spice
+++ b/cells/xnor3/sky130_fd_sc_hd__xnor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xnor3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xnor3_1 A B C VGND VNB VPB VPWR X
 M1000 a_331_325# B a_841_297# VNB nshort w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_1106_49# a_841_297# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor3/sky130_fd_sc_hd__xnor3_2.spice b/cells/xnor3/sky130_fd_sc_hd__xnor3_2.spice
index 0c0e167..6f805e1 100644
--- a/cells/xnor3/sky130_fd_sc_hd__xnor3_2.spice
+++ b/cells/xnor3/sky130_fd_sc_hd__xnor3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xnor3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xnor3_2 A B C VGND VNB VPB VPWR X
 M1000 VPWR a_87_21# X VPB phighvt w=1e+06u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_308_93# C VPWR VPB phighvt w=640000u l=150000u
 +  ad=1.792e+11p pd=1.84e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor3/sky130_fd_sc_hd__xnor3_4.spice b/cells/xnor3/sky130_fd_sc_hd__xnor3_4.spice
index 583011e..23d1673 100644
--- a/cells/xnor3/sky130_fd_sc_hd__xnor3_4.spice
+++ b/cells/xnor3/sky130_fd_sc_hd__xnor3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xnor3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xnor3_4 A B C VGND VNB VPB VPWR X
 M1000 a_1011_297# B VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 VGND a_101_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hd__xor2_1.spice b/cells/xor2/sky130_fd_sc_hd__xor2_1.spice
index 984f486..0159506 100644
--- a/cells/xor2/sky130_fd_sc_hd__xor2_1.spice
+++ b/cells/xor2/sky130_fd_sc_hd__xor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xor2_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xor2_1 A B VGND VNB VPB VPWR X
 M1000 a_285_47# A VGND VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_117_297# B a_35_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=2.6e+11p ps=2.52e+06u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hd__xor2_2.spice b/cells/xor2/sky130_fd_sc_hd__xor2_2.spice
index 137e0cc..1b23ca7 100644
--- a/cells/xor2/sky130_fd_sc_hd__xor2_2.spice
+++ b/cells/xor2/sky130_fd_sc_hd__xor2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xor2_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xor2_2 A B VGND VNB VPB VPWR X
 M1000 a_470_297# A VPWR VPB phighvt w=1e+06u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_27_297# A VPWR VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hd__xor2_4.spice b/cells/xor2/sky130_fd_sc_hd__xor2_4.spice
index 8e281e8..bfc2cd6 100644
--- a/cells/xor2/sky130_fd_sc_hd__xor2_4.spice
+++ b/cells/xor2/sky130_fd_sc_hd__xor2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xor2_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xor2_4 A B VGND VNB VPB VPWR X
 M1000 a_806_297# B VPWR VPB phighvt w=1e+06u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR A a_806_297# VPB phighvt w=1e+06u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor3/sky130_fd_sc_hd__xor3_1.spice b/cells/xor3/sky130_fd_sc_hd__xor3_1.spice
index b2e4f2c..afc73f1 100644
--- a/cells/xor3/sky130_fd_sc_hd__xor3_1.spice
+++ b/cells/xor3/sky130_fd_sc_hd__xor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xor3_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xor3_1 A B C VGND VNB VPB VPWR X
 M1000 a_827_297# B VPWR VPB phighvt w=1e+06u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_386_325# B a_1198_49# VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor3/sky130_fd_sc_hd__xor3_2.spice b/cells/xor3/sky130_fd_sc_hd__xor3_2.spice
index 8d6a9c9..9346c4e 100644
--- a/cells/xor3/sky130_fd_sc_hd__xor3_2.spice
+++ b/cells/xor3/sky130_fd_sc_hd__xor3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xor3_2.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xor3_2 A B C VGND VNB VPB VPWR X
 M1000 a_496_49# a_358_93# a_120_21# VPB phighvt w=840000u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_1023_365# a_919_297# a_478_325# VNB nshort w=600000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor3/sky130_fd_sc_hd__xor3_4.spice b/cells/xor3/sky130_fd_sc_hd__xor3_4.spice
index bef62ac..085324c 100644
--- a/cells/xor3/sky130_fd_sc_hd__xor3_4.spice
+++ b/cells/xor3/sky130_fd_sc_hd__xor3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hd__xor3_4.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hd__xor3_4 A B C VGND VNB VPB VPWR X
 M1000 X a_79_21# VPWR VPB phighvt w=1e+06u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_1031_297# B VGND VNB nshort w=650000u l=150000u
 +  ad=1.653e+11p pd=1.82e+06u as=0p ps=0u
 .ends
-