diff --git a/cells/a211o/sky130_fd_sc_hdll__a211o_1.spice b/cells/a211o/sky130_fd_sc_hdll__a211o_1.spice
index d58ec60..7f1acf3 100644
--- a/cells/a211o/sky130_fd_sc_hdll__a211o_1.spice
+++ b/cells/a211o/sky130_fd_sc_hdll__a211o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a211o_1 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_80_21# C1 a_546_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_80_21# C1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211o/sky130_fd_sc_hdll__a211o_2.spice b/cells/a211o/sky130_fd_sc_hdll__a211o_2.spice
index f7bbc85..823824a 100644
--- a/cells/a211o/sky130_fd_sc_hdll__a211o_2.spice
+++ b/cells/a211o/sky130_fd_sc_hdll__a211o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a211o_2 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 VPWR a_79_21# X VPB phighvt w=1e+06u l=180000u
@@ -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/a211o/sky130_fd_sc_hdll__a211o_4.spice b/cells/a211o/sky130_fd_sc_hdll__a211o_4.spice
index c3bf565..59ee5ff 100644
--- a/cells/a211o/sky130_fd_sc_hdll__a211o_4.spice
+++ b/cells/a211o/sky130_fd_sc_hdll__a211o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a211o_4 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 VPWR A2 a_523_297# VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 VGND C1 a_79_204# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211oi/sky130_fd_sc_hdll__a211oi_1.spice b/cells/a211oi/sky130_fd_sc_hdll__a211oi_1.spice
index 1ebc9d8..27d90e0 100644
--- a/cells/a211oi/sky130_fd_sc_hdll__a211oi_1.spice
+++ b/cells/a211oi/sky130_fd_sc_hdll__a211oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a211oi_1 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 Y C1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211oi/sky130_fd_sc_hdll__a211oi_2.spice b/cells/a211oi/sky130_fd_sc_hdll__a211oi_2.spice
index 6752665..6b49b29 100644
--- a/cells/a211oi/sky130_fd_sc_hdll__a211oi_2.spice
+++ b/cells/a211oi/sky130_fd_sc_hdll__a211oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a211oi_2 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_320_297# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 VPWR A1 a_320_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a211oi/sky130_fd_sc_hdll__a211oi_4.spice b/cells/a211oi/sky130_fd_sc_hdll__a211oi_4.spice
index bcf8016..2b87277 100644
--- a/cells/a211oi/sky130_fd_sc_hdll__a211oi_4.spice
+++ b/cells/a211oi/sky130_fd_sc_hdll__a211oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a211oi_4 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_27_297# A2 VPWR VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 a_119_47# A2 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21bo/sky130_fd_sc_hdll__a21bo_1.spice b/cells/a21bo/sky130_fd_sc_hdll__a21bo_1.spice
index 68595cd..175e2e6 100644
--- a/cells/a21bo/sky130_fd_sc_hdll__a21bo_1.spice
+++ b/cells/a21bo/sky130_fd_sc_hdll__a21bo_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21bo_1 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 a_326_297# A2 VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 X a_235_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=3.85e+11p pd=2.77e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/a21bo/sky130_fd_sc_hdll__a21bo_2.spice b/cells/a21bo/sky130_fd_sc_hdll__a21bo_2.spice
index 9ebce7f..ca552c9 100644
--- a/cells/a21bo/sky130_fd_sc_hdll__a21bo_2.spice
+++ b/cells/a21bo/sky130_fd_sc_hdll__a21bo_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21bo_2 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 a_621_47# A1 a_79_21# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_79_21# a_317_93# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21bo/sky130_fd_sc_hdll__a21bo_4.spice b/cells/a21bo/sky130_fd_sc_hdll__a21bo_4.spice
index b0d602c..a30afbe 100644
--- a/cells/a21bo/sky130_fd_sc_hdll__a21bo_4.spice
+++ b/cells/a21bo/sky130_fd_sc_hdll__a21bo_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21bo_4 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 X a_209_21# VPWR VPB phighvt w=1e+06u l=180000u
@@ -46,4 +61,3 @@
 M1021 a_209_21# A1 a_935_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hdll__a21boi_1.spice b/cells/a21boi/sky130_fd_sc_hdll__a21boi_1.spice
index 870eb32..f72d863 100644
--- a/cells/a21boi/sky130_fd_sc_hdll__a21boi_1.spice
+++ b/cells/a21boi/sky130_fd_sc_hdll__a21boi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21boi_1 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 VPWR B1_N a_27_413# VPB phighvt w=420000u l=180000u
@@ -18,4 +33,3 @@
 M1007 a_338_297# a_27_413# Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=3.25e+11p ps=2.65e+06u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hdll__a21boi_2.spice b/cells/a21boi/sky130_fd_sc_hdll__a21boi_2.spice
index 273ccb8..e1761c7 100644
--- a/cells/a21boi/sky130_fd_sc_hdll__a21boi_2.spice
+++ b/cells/a21boi/sky130_fd_sc_hdll__a21boi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21boi_2 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_228_297# A1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 VGND A2 a_697_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21boi/sky130_fd_sc_hdll__a21boi_4.spice b/cells/a21boi/sky130_fd_sc_hdll__a21boi_4.spice
index 7d27d7a..728d86a 100644
--- a/cells/a21boi/sky130_fd_sc_hdll__a21boi_4.spice
+++ b/cells/a21boi/sky130_fd_sc_hdll__a21boi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21boi_4 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_724_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -54,4 +69,3 @@
 M1025 Y a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hdll__a21o_1.spice b/cells/a21o/sky130_fd_sc_hdll__a21o_1.spice
index 3aa9b16..670ec82 100644
--- a/cells/a21o/sky130_fd_sc_hdll__a21o_1.spice
+++ b/cells/a21o/sky130_fd_sc_hdll__a21o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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_416_47# A1 a_81_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hdll__a21o_2.spice b/cells/a21o/sky130_fd_sc_hdll__a21o_2.spice
index de517f8..1a909e3 100644
--- a/cells/a21o/sky130_fd_sc_hdll__a21o_2.spice
+++ b/cells/a21o/sky130_fd_sc_hdll__a21o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21o_2 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 a_444_297# A2 VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VGND A2 a_532_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hdll__a21o_4.spice b/cells/a21o/sky130_fd_sc_hdll__a21o_4.spice
index 3c86bed..0404fc9 100644
--- a/cells/a21o/sky130_fd_sc_hdll__a21o_4.spice
+++ b/cells/a21o/sky130_fd_sc_hdll__a21o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21o_4 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VGND B1 a_84_21# VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 X a_84_21# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hdll__a21o_6.spice b/cells/a21o/sky130_fd_sc_hdll__a21o_6.spice
index 37c51a7..01ad7ea 100644
--- a/cells/a21o/sky130_fd_sc_hdll__a21o_6.spice
+++ b/cells/a21o/sky130_fd_sc_hdll__a21o_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__a21o_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_hdll__a21o_6 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VGND A2 a_297_47# VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 X a_213_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21o/sky130_fd_sc_hdll__a21o_8.spice b/cells/a21o/sky130_fd_sc_hdll__a21o_8.spice
index c8c1741..0f1e8d6 100644
--- a/cells/a21o/sky130_fd_sc_hdll__a21o_8.spice
+++ b/cells/a21o/sky130_fd_sc_hdll__a21o_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__a21o_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_hdll__a21o_8 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VGND A2 a_297_47# VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 X a_213_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hdll__a21oi_1.spice b/cells/a21oi/sky130_fd_sc_hdll__a21oi_1.spice
index f00c295..9718cc2 100644
--- a/cells/a21oi/sky130_fd_sc_hdll__a21oi_1.spice
+++ b/cells/a21oi/sky130_fd_sc_hdll__a21oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21oi_1 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_121_297# B1 Y VPB phighvt w=1e+06u l=180000u
@@ -14,4 +29,3 @@
 M1005 VGND A2 a_219_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hdll__a21oi_2.spice b/cells/a21oi/sky130_fd_sc_hdll__a21oi_2.spice
index b06029a..3a023e2 100644
--- a/cells/a21oi/sky130_fd_sc_hdll__a21oi_2.spice
+++ b/cells/a21oi/sky130_fd_sc_hdll__a21oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21oi_2 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 a_27_297# A2 VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hdll__a21oi_4.spice b/cells/a21oi/sky130_fd_sc_hdll__a21oi_4.spice
index 26318e2..bb87041 100644
--- a/cells/a21oi/sky130_fd_sc_hdll__a21oi_4.spice
+++ b/cells/a21oi/sky130_fd_sc_hdll__a21oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a21oi_4 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_28_297# VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 a_502_47# A1 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221oi/sky130_fd_sc_hdll__a221oi_1.spice b/cells/a221oi/sky130_fd_sc_hdll__a221oi_1.spice
index 97c0c4c..7175f11 100644
--- a/cells/a221oi/sky130_fd_sc_hdll__a221oi_1.spice
+++ b/cells/a221oi/sky130_fd_sc_hdll__a221oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a221oi_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_211_297# B2 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_117_297# B1 a_211_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221oi/sky130_fd_sc_hdll__a221oi_2.spice b/cells/a221oi/sky130_fd_sc_hdll__a221oi_2.spice
index 1af99d8..1416929 100644
--- a/cells/a221oi/sky130_fd_sc_hdll__a221oi_2.spice
+++ b/cells/a221oi/sky130_fd_sc_hdll__a221oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a221oi_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 Y B1 a_413_47# VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_321_297# B2 a_27_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a221oi/sky130_fd_sc_hdll__a221oi_4.spice b/cells/a221oi/sky130_fd_sc_hdll__a221oi_4.spice
index fed4995..5ea189b 100644
--- a/cells/a221oi/sky130_fd_sc_hdll__a221oi_4.spice
+++ b/cells/a221oi/sky130_fd_sc_hdll__a221oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a221oi_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 a_511_297# A1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 Y A1 a_1375_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a222oi/sky130_fd_sc_hdll__a222oi_1.spice b/cells/a222oi/sky130_fd_sc_hdll__a222oi_1.spice
index 473efd3..849ed64 100644
--- a/cells/a222oi/sky130_fd_sc_hdll__a222oi_1.spice
+++ b/cells/a222oi/sky130_fd_sc_hdll__a222oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a222oi_1 A1 A2 B1 B2 C1 C2 VGND VNB VPB VPWR Y
 M1000 a_357_297# B1 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 a_119_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_hdll__a22o_1.spice b/cells/a22o/sky130_fd_sc_hdll__a22o_1.spice
index e2ead7e..8634516 100644
--- a/cells/a22o/sky130_fd_sc_hdll__a22o_1.spice
+++ b/cells/a22o/sky130_fd_sc_hdll__a22o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a22o_1 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_27_297# B1 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_119_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_hdll__a22o_2.spice b/cells/a22o/sky130_fd_sc_hdll__a22o_2.spice
index 4c4dedb..753cb25 100644
--- a/cells/a22o/sky130_fd_sc_hdll__a22o_2.spice
+++ b/cells/a22o/sky130_fd_sc_hdll__a22o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a22o_2 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_27_297# B1 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 VPWR a_27_297# X VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22o/sky130_fd_sc_hdll__a22o_4.spice b/cells/a22o/sky130_fd_sc_hdll__a22o_4.spice
index 4666dd5..f85bbcb 100644
--- a/cells/a22o/sky130_fd_sc_hdll__a22o_4.spice
+++ b/cells/a22o/sky130_fd_sc_hdll__a22o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a22o_4 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_1008_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_524_297# B2 a_96_21# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22oi/sky130_fd_sc_hdll__a22oi_1.spice b/cells/a22oi/sky130_fd_sc_hdll__a22oi_1.spice
index c3c6503..e33ee56 100644
--- a/cells/a22oi/sky130_fd_sc_hdll__a22oi_1.spice
+++ b/cells/a22oi/sky130_fd_sc_hdll__a22oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a22oi_1 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B1 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 a_119_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_hdll__a22oi_2.spice b/cells/a22oi/sky130_fd_sc_hdll__a22oi_2.spice
index c93029a..7d5e78f 100644
--- a/cells/a22oi/sky130_fd_sc_hdll__a22oi_2.spice
+++ b/cells/a22oi/sky130_fd_sc_hdll__a22oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a22oi_2 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y B2 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 VPWR A2 a_117_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22oi/sky130_fd_sc_hdll__a22oi_4.spice b/cells/a22oi/sky130_fd_sc_hdll__a22oi_4.spice
index e9447f9..fc96b71 100644
--- a/cells/a22oi/sky130_fd_sc_hdll__a22oi_4.spice
+++ b/cells/a22oi/sky130_fd_sc_hdll__a22oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a22oi_4 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_27_297# B1 Y VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 Y A1 a_883_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_1.spice b/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_1.spice
index 49f8530..c7d5054 100644
--- a/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_1.spice
+++ b/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a2bb2o_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 a_525_413# a_243_47# a_79_21# VPB phighvt w=420000u l=180000u
@@ -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/a2bb2o/sky130_fd_sc_hdll__a2bb2o_2.spice b/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_2.spice
index 8a5638d..f6b4f62 100644
--- a/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_2.spice
+++ b/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a2bb2o_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 X a_82_21# VPWR VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 a_82_21# a_343_47# VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_4.spice b/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_4.spice
index 543e4d1..d2b2e4e 100644
--- a/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_4.spice
+++ b/cells/a2bb2o/sky130_fd_sc_hdll__a2bb2o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a2bb2o_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 a_455_21# A1_N VGND VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_119_47# B2 a_203_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_1.spice b/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_1.spice
index 8ea5e0c..86c2f67 100644
--- a/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_1.spice
+++ b/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a2bb2oi_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_521_47# B2 Y VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR B2 a_409_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_2.spice b/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_2.spice
index 29d20d6..321e09b 100644
--- a/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_2.spice
+++ b/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a2bb2oi_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_27_297# B2 VPWR VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 a_119_47# B2 Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_4.spice b/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_4.spice
index 9eadd35..f567974 100644
--- a/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_4.spice
+++ b/cells/a2bb2oi/sky130_fd_sc_hdll__a2bb2oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a2bb2oi_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_27_297# B1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 VGND A2_N a_831_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31o/sky130_fd_sc_hdll__a31o_1.spice b/cells/a31o/sky130_fd_sc_hdll__a31o_1.spice
index c46acfa..46d43de 100644
--- a/cells/a31o/sky130_fd_sc_hdll__a31o_1.spice
+++ b/cells/a31o/sky130_fd_sc_hdll__a31o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a31o_1 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 VGND B1 a_80_21# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_80_21# B1 a_225_297# VPB phighvt w=1e+06u l=180000u
 +  ad=3.3e+11p pd=2.66e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/a31o/sky130_fd_sc_hdll__a31o_2.spice b/cells/a31o/sky130_fd_sc_hdll__a31o_2.spice
index eabbcb5..1615f09 100644
--- a/cells/a31o/sky130_fd_sc_hdll__a31o_2.spice
+++ b/cells/a31o/sky130_fd_sc_hdll__a31o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a31o_2 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 VPWR a_79_21# X VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 a_307_47# A3 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31o/sky130_fd_sc_hdll__a31o_4.spice b/cells/a31o/sky130_fd_sc_hdll__a31o_4.spice
index dbf9873..616c14b 100644
--- a/cells/a31o/sky130_fd_sc_hdll__a31o_4.spice
+++ b/cells/a31o/sky130_fd_sc_hdll__a31o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a31o_4 A1 A2 A3 B1 VGND VNB VPB VPWR X
 M1000 a_27_297# A2 VPWR VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 X a_297_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31oi/sky130_fd_sc_hdll__a31oi_1.spice b/cells/a31oi/sky130_fd_sc_hdll__a31oi_1.spice
index 2a81693..7f22f37 100644
--- a/cells/a31oi/sky130_fd_sc_hdll__a31oi_1.spice
+++ b/cells/a31oi/sky130_fd_sc_hdll__a31oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a31oi_1 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 Y A1 a_203_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31oi/sky130_fd_sc_hdll__a31oi_2.spice b/cells/a31oi/sky130_fd_sc_hdll__a31oi_2.spice
index 6ffb0fe..7581331 100644
--- a/cells/a31oi/sky130_fd_sc_hdll__a31oi_2.spice
+++ b/cells/a31oi/sky130_fd_sc_hdll__a31oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a31oi_2 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 Y A1 a_297_47# VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 VPWR A2 a_27_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a31oi/sky130_fd_sc_hdll__a31oi_4.spice b/cells/a31oi/sky130_fd_sc_hdll__a31oi_4.spice
index 9c10d7c..1b2d4c2 100644
--- a/cells/a31oi/sky130_fd_sc_hdll__a31oi_4.spice
+++ b/cells/a31oi/sky130_fd_sc_hdll__a31oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a31oi_4 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 a_27_297# A2 VPWR VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 VGND A3 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32o/sky130_fd_sc_hdll__a32o_1.spice b/cells/a32o/sky130_fd_sc_hdll__a32o_1.spice
index 7844d2a..3b4a47c 100644
--- a/cells/a32o/sky130_fd_sc_hdll__a32o_1.spice
+++ b/cells/a32o/sky130_fd_sc_hdll__a32o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a32o_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 a_276_47# A3 VGND VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND B2 a_634_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32o/sky130_fd_sc_hdll__a32o_2.spice b/cells/a32o/sky130_fd_sc_hdll__a32o_2.spice
index 2f22d43..c6e9e32 100644
--- a/cells/a32o/sky130_fd_sc_hdll__a32o_2.spice
+++ b/cells/a32o/sky130_fd_sc_hdll__a32o_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a32o_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 X a_21_199# VPWR VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 VGND A3 a_725_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32o/sky130_fd_sc_hdll__a32o_4.spice b/cells/a32o/sky130_fd_sc_hdll__a32o_4.spice
index a3a7ff6..2228c7a 100644
--- a/cells/a32o/sky130_fd_sc_hdll__a32o_4.spice
+++ b/cells/a32o/sky130_fd_sc_hdll__a32o_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a32o_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR X
 M1000 a_79_21# B1 a_493_297# VPB phighvt w=1e+06u l=180000u
@@ -58,4 +73,3 @@
 M1027 VPWR A2 a_493_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32oi/sky130_fd_sc_hdll__a32oi_1.spice b/cells/a32oi/sky130_fd_sc_hdll__a32oi_1.spice
index 5d49daf..05cc6c6 100644
--- a/cells/a32oi/sky130_fd_sc_hdll__a32oi_1.spice
+++ b/cells/a32oi/sky130_fd_sc_hdll__a32oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a32oi_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_27_297# B1 Y VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_339_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_hdll__a32oi_2.spice b/cells/a32oi/sky130_fd_sc_hdll__a32oi_2.spice
index 68db027..e8a41fb 100644
--- a/cells/a32oi/sky130_fd_sc_hdll__a32oi_2.spice
+++ b/cells/a32oi/sky130_fd_sc_hdll__a32oi_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a32oi_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 VPWR A2 a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 a_757_47# A3 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a32oi/sky130_fd_sc_hdll__a32oi_4.spice b/cells/a32oi/sky130_fd_sc_hdll__a32oi_4.spice
index 3c85326..19fd342 100644
--- a/cells/a32oi/sky130_fd_sc_hdll__a32oi_4.spice
+++ b/cells/a32oi/sky130_fd_sc_hdll__a32oi_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__a32oi_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_27_297# B1 Y VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 VGND B2 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hdll__and2_1.spice b/cells/and2/sky130_fd_sc_hdll__and2_1.spice
index 6b1de2f..1d7f254 100644
--- a/cells/and2/sky130_fd_sc_hdll__and2_1.spice
+++ b/cells/and2/sky130_fd_sc_hdll__and2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and2_1 A B VGND VNB VPB VPWR X
 M1000 a_27_75# A VPWR VPB phighvt w=420000u l=180000u
@@ -14,4 +29,3 @@
 M1005 a_123_75# A a_27_75# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.386e+11p ps=1.5e+06u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hdll__and2_2.spice b/cells/and2/sky130_fd_sc_hdll__and2_2.spice
index d5bee69..78ac86f 100644
--- a/cells/and2/sky130_fd_sc_hdll__and2_2.spice
+++ b/cells/and2/sky130_fd_sc_hdll__and2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and2_2 A B VGND VNB VPB VPWR X
 M1000 X a_27_75# VPWR VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 a_123_75# A a_27_75# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.386e+11p ps=1.5e+06u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hdll__and2_4.spice b/cells/and2/sky130_fd_sc_hdll__and2_4.spice
index 5ba4f64..6caa93a 100644
--- a/cells/and2/sky130_fd_sc_hdll__and2_4.spice
+++ b/cells/and2/sky130_fd_sc_hdll__and2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and2_4 A B VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hdll__and2_6.spice b/cells/and2/sky130_fd_sc_hdll__and2_6.spice
index 04e2d22..2e4239f 100644
--- a/cells/and2/sky130_fd_sc_hdll__and2_6.spice
+++ b/cells/and2/sky130_fd_sc_hdll__and2_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__and2_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_hdll__and2_6 A B VGND VNB VPB VPWR X
 M1000 VPWR a_117_297# X VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 X a_117_297# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hdll__and2_8.spice b/cells/and2/sky130_fd_sc_hdll__and2_8.spice
index 7fe70ba..3c7884c 100644
--- a/cells/and2/sky130_fd_sc_hdll__and2_8.spice
+++ b/cells/and2/sky130_fd_sc_hdll__and2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__and2_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_hdll__and2_8 A B VGND VNB VPB VPWR X
 M1000 VPWR a_117_297# X VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 X a_117_297# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2b/sky130_fd_sc_hdll__and2b_1.spice b/cells/and2b/sky130_fd_sc_hdll__and2b_1.spice
index a50e2e5..fb4b07a 100644
--- a/cells/and2b/sky130_fd_sc_hdll__and2b_1.spice
+++ b/cells/and2b/sky130_fd_sc_hdll__and2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and2b_1 A_N B VGND VNB VPB VPWR X
 M1000 VPWR A_N a_27_413# VPB phighvt w=420000u l=180000u
@@ -18,4 +33,3 @@
 M1007 VPWR B a_225_413# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2b/sky130_fd_sc_hdll__and2b_2.spice b/cells/and2b/sky130_fd_sc_hdll__and2b_2.spice
index 77dfc38..97740e4 100644
--- a/cells/and2b/sky130_fd_sc_hdll__and2b_2.spice
+++ b/cells/and2b/sky130_fd_sc_hdll__and2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and2b_2 A_N B VGND VNB VPB VPWR X
 M1000 VPWR a_230_413# X VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 X a_230_413# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2b/sky130_fd_sc_hdll__and2b_4.spice b/cells/and2b/sky130_fd_sc_hdll__and2b_4.spice
index fb44e45..151478f 100644
--- a/cells/and2b/sky130_fd_sc_hdll__and2b_4.spice
+++ b/cells/and2b/sky130_fd_sc_hdll__and2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and2b_4 A_N B VGND VNB VPB VPWR X
 M1000 VPWR B a_27_47# VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hdll__and3_1.spice b/cells/and3/sky130_fd_sc_hdll__and3_1.spice
index e3250bb..fc1fe71 100644
--- a/cells/and3/sky130_fd_sc_hdll__and3_1.spice
+++ b/cells/and3/sky130_fd_sc_hdll__and3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and3_1 A B C VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 a_27_47# B VPWR VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hdll__and3_2.spice b/cells/and3/sky130_fd_sc_hdll__and3_2.spice
index 38769cf..c51af94 100644
--- a/cells/and3/sky130_fd_sc_hdll__and3_2.spice
+++ b/cells/and3/sky130_fd_sc_hdll__and3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and3_2 A B C VGND VNB VPB VPWR X
 M1000 VGND a_29_311# X VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR A a_29_311# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hdll__and3_4.spice b/cells/and3/sky130_fd_sc_hdll__and3_4.spice
index 91a3f48..a2b9c36 100644
--- a/cells/and3/sky130_fd_sc_hdll__and3_4.spice
+++ b/cells/and3/sky130_fd_sc_hdll__and3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and3_4 A B C VGND VNB VPB VPWR X
 M1000 X a_85_297# VPWR VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 VPWR A a_85_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3b/sky130_fd_sc_hdll__and3b_1.spice b/cells/and3b/sky130_fd_sc_hdll__and3b_1.spice
index 653e68c..c36bdb0 100644
--- a/cells/and3b/sky130_fd_sc_hdll__and3b_1.spice
+++ b/cells/and3b/sky130_fd_sc_hdll__and3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and3b_1 A_N B C VGND VNB VPB VPWR X
 M1000 a_317_53# a_117_413# a_225_311# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND C a_411_53# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3b/sky130_fd_sc_hdll__and3b_2.spice b/cells/and3b/sky130_fd_sc_hdll__and3b_2.spice
index c06c35a..60aa5cf 100644
--- a/cells/and3b/sky130_fd_sc_hdll__and3b_2.spice
+++ b/cells/and3b/sky130_fd_sc_hdll__and3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and3b_2 A_N B C VGND VNB VPB VPWR X
 M1000 a_117_311# A_N VGND VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 X a_225_311# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and3b/sky130_fd_sc_hdll__and3b_4.spice b/cells/and3b/sky130_fd_sc_hdll__and3b_4.spice
index 9d0bb96..b0ab54b 100644
--- a/cells/and3b/sky130_fd_sc_hdll__and3b_4.spice
+++ b/cells/and3b/sky130_fd_sc_hdll__and3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and3b_4 A_N B C VGND VNB VPB VPWR X
 M1000 VGND C a_277_47# VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 a_56_297# B VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4/sky130_fd_sc_hdll__and4_1.spice b/cells/and4/sky130_fd_sc_hdll__and4_1.spice
index e18478a..79b230f 100644
--- a/cells/and4/sky130_fd_sc_hdll__and4_1.spice
+++ b/cells/and4/sky130_fd_sc_hdll__and4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4_1 A B C D VGND VNB VPB VPWR X
 M1000 VGND D a_299_47# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VPWR D a_27_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4/sky130_fd_sc_hdll__and4_2.spice b/cells/and4/sky130_fd_sc_hdll__and4_2.spice
index b5f00c6..e10a945 100644
--- a/cells/and4/sky130_fd_sc_hdll__and4_2.spice
+++ b/cells/and4/sky130_fd_sc_hdll__and4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4_2 A B C D VGND VNB VPB VPWR X
 M1000 VGND a_27_47# X VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR a_27_47# X VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4/sky130_fd_sc_hdll__and4_4.spice b/cells/and4/sky130_fd_sc_hdll__and4_4.spice
index 1cd6731..b158d2f 100644
--- a/cells/and4/sky130_fd_sc_hdll__and4_4.spice
+++ b/cells/and4/sky130_fd_sc_hdll__and4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4_4 A B C D VGND VNB VPB VPWR X
 M1000 VPWR D a_27_47# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 a_304_47# C a_198_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4b/sky130_fd_sc_hdll__and4b_1.spice b/cells/and4b/sky130_fd_sc_hdll__and4b_1.spice
index 19bfdd0..4503d8f 100644
--- a/cells/and4b/sky130_fd_sc_hdll__and4b_1.spice
+++ b/cells/and4b/sky130_fd_sc_hdll__and4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4b_1 A_N B C D VGND VNB VPB VPWR X
 M1000 a_379_47# B a_307_47# VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_307_47# a_27_47# a_213_413# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/and4b/sky130_fd_sc_hdll__and4b_2.spice b/cells/and4b/sky130_fd_sc_hdll__and4b_2.spice
index e997e8e..e6b10c2 100644
--- a/cells/and4b/sky130_fd_sc_hdll__and4b_2.spice
+++ b/cells/and4b/sky130_fd_sc_hdll__and4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4b_2 A_N B C D VGND VNB VPB VPWR X
 M1000 VPWR D a_211_413# VPB phighvt w=420000u l=180000u
@@ -30,4 +45,3 @@
 M1013 a_519_47# C a_399_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4b/sky130_fd_sc_hdll__and4b_4.spice b/cells/and4b/sky130_fd_sc_hdll__and4b_4.spice
index 95ab16a..861c6a9 100644
--- a/cells/and4b/sky130_fd_sc_hdll__and4b_4.spice
+++ b/cells/and4b/sky130_fd_sc_hdll__and4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4b_4 A_N B C D VGND VNB VPB VPWR X
 M1000 a_184_21# a_27_47# a_814_47# VNB nshort w=650000u l=150000u
@@ -38,4 +53,3 @@
 M1017 X a_184_21# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4bb/sky130_fd_sc_hdll__and4bb_1.spice b/cells/and4bb/sky130_fd_sc_hdll__and4bb_1.spice
index 62c3746..b4f5100 100644
--- a/cells/and4bb/sky130_fd_sc_hdll__and4bb_1.spice
+++ b/cells/and4bb/sky130_fd_sc_hdll__and4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4bb_1 A_N B_N C D VGND VNB VPB VPWR X
 M1000 a_425_93# a_27_47# a_339_93# VNB nshort w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 X a_339_93# VGND VNB nshort w=650000u l=150000u
 +  ad=1.69e+11p pd=1.82e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/and4bb/sky130_fd_sc_hdll__and4bb_2.spice b/cells/and4bb/sky130_fd_sc_hdll__and4bb_2.spice
index ddc3688..0183273 100644
--- a/cells/and4bb/sky130_fd_sc_hdll__and4bb_2.spice
+++ b/cells/and4bb/sky130_fd_sc_hdll__and4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4bb_2 A_N B_N C D VGND VNB VPB VPWR X
 M1000 a_503_47# a_27_47# a_184_21# VNB nshort w=420000u l=150000u
@@ -34,4 +49,3 @@
 M1015 X a_184_21# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and4bb/sky130_fd_sc_hdll__and4bb_4.spice b/cells/and4bb/sky130_fd_sc_hdll__and4bb_4.spice
index 73bd8a1..1091c2b 100644
--- a/cells/and4bb/sky130_fd_sc_hdll__and4bb_4.spice
+++ b/cells/and4bb/sky130_fd_sc_hdll__and4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__and4bb_4 A_N B_N C D VGND VNB VPB VPWR X
 M1000 a_606_47# D VGND VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 X a_184_21# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hdll__buf_1.spice b/cells/buf/sky130_fd_sc_hdll__buf_1.spice
index 0741ea2..7f8985d 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_1.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_1 A VGND VNB VPB VPWR X
 M1000 VPWR A a_27_47# VPB phighvt w=790000u l=180000u
@@ -10,4 +25,3 @@
 M1003 X a_27_47# VGND VNB nshort w=520000u l=150000u
 +  ad=1.352e+11p pd=1.56e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hdll__buf_12.spice b/cells/buf/sky130_fd_sc_hdll__buf_12.spice
index d7515fd..9888d87 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_12.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_12 A VGND VNB VPB VPWR X
 M1000 VPWR a_117_297# X VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 a_117_297# A VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hdll__buf_16.spice b/cells/buf/sky130_fd_sc_hdll__buf_16.spice
index cda7815..1b31a00 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_16.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_16 A VGND VNB VPB VPWR X
 M1000 VPWR a_109_47# X VPB phighvt w=1e+06u l=180000u
@@ -90,4 +105,3 @@
 M1043 X a_109_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hdll__buf_2.spice b/cells/buf/sky130_fd_sc_hdll__buf_2.spice
index 461c624..0bec7eb 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_2.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_2 A VGND VNB VPB VPWR X
 M1000 VGND A a_27_47# VNB nshort w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 VGND a_27_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_hdll__buf_4.spice b/cells/buf/sky130_fd_sc_hdll__buf_4.spice
index 0e68e39..e9b2de3 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_4.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_4 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VGND a_27_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_hdll__buf_6.spice b/cells/buf/sky130_fd_sc_hdll__buf_6.spice
index aafa675..b4becb9 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_6.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_6 A VGND VNB VPB VPWR X
 M1000 VGND a_169_297# X VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 X a_169_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hdll__buf_8.spice b/cells/buf/sky130_fd_sc_hdll__buf_8.spice
index 7638c37..064c135 100644
--- a/cells/buf/sky130_fd_sc_hdll__buf_8.spice
+++ b/cells/buf/sky130_fd_sc_hdll__buf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__buf_8 A VGND VNB VPB VPWR X
 M1000 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__bufbuf_16.spice b/cells/bufbuf/sky130_fd_sc_hdll__bufbuf_16.spice
index 85e6183..6cb2f1e 100644
--- a/cells/bufbuf/sky130_fd_sc_hdll__bufbuf_16.spice
+++ b/cells/bufbuf/sky130_fd_sc_hdll__bufbuf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__bufbuf_16 A VGND VNB VPB VPWR X
 M1000 X a_589_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -106,4 +121,3 @@
 M1051 VGND a_589_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_hdll__bufbuf_8.spice b/cells/bufbuf/sky130_fd_sc_hdll__bufbuf_8.spice
index d5391d0..93a1653 100644
--- a/cells/bufbuf/sky130_fd_sc_hdll__bufbuf_8.spice
+++ b/cells/bufbuf/sky130_fd_sc_hdll__bufbuf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__bufbuf_8 A VGND VNB VPB VPWR X
 M1000 VPWR a_338_47# X VPB phighvt w=1e+06u l=180000u
@@ -54,4 +69,3 @@
 M1025 X a_338_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/bufinv/sky130_fd_sc_hdll__bufinv_16.spice b/cells/bufinv/sky130_fd_sc_hdll__bufinv_16.spice
index cd62bef..05e1157 100644
--- a/cells/bufinv/sky130_fd_sc_hdll__bufinv_16.spice
+++ b/cells/bufinv/sky130_fd_sc_hdll__bufinv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__bufinv_16 A VGND VNB VPB VPWR Y
 M1000 a_391_47# a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -102,4 +117,3 @@
 M1049 VGND A a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/bufinv/sky130_fd_sc_hdll__bufinv_8.spice b/cells/bufinv/sky130_fd_sc_hdll__bufinv_8.spice
index d645df6..4e7d3c1 100644
--- a/cells/bufinv/sky130_fd_sc_hdll__bufinv_8.spice
+++ b/cells/bufinv/sky130_fd_sc_hdll__bufinv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__bufinv_8 A VGND VNB VPB VPWR Y
 M1000 Y a_225_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 VGND a_117_297# a_225_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_1.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_1.spice
index c3764e6..c7c7804 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_1.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkbuf_1 A VGND VNB VPB VPWR X
 M1000 VPWR a_75_212# X VPB phighvt w=790000u l=180000u
@@ -10,4 +25,3 @@
 M1003 VGND a_75_212# X w_233_n17# nshort w=520000u l=150000u
 +  ad=0p pd=0u as=1.612e+11p ps=1.66e+06u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_12.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_12.spice
index 3ae3fe4..cc6d0bb 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_12.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__clkbuf_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_hdll__clkbuf_12 A VGND VNB VPB VPWR X
 M1000 VPWR a_117_297# X VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 a_117_297# 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_hdll__clkbuf_16.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_16.spice
index 6edeefb..001ce3d 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_16.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkbuf_16 A VGND VNB VPB VPWR X
 M1000 VGND a_118_297# X VNB nshort w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VGND a_118_297# X VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_2.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_2.spice
index 4719a94..db958d6 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_2.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkbuf_2 A VGND VNB VPB VPWR X
 M1000 VGND A a_27_47# VNB nshort w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_4.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_4.spice
index 350515b..59d5371 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_4.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkbuf_4 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_27_47# X VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_6.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_6.spice
index e7b0902..6cfbb3f 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_6.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__clkbuf_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_hdll__clkbuf_6 A VGND VNB VPB VPWR X
 M1000 VPWR a_117_297# X VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 X a_117_297# VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_8.spice b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_8.spice
index 1d55cc3..4e2916f 100644
--- a/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_8.spice
+++ b/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkbuf_8 A VGND VNB VPB VPWR X
 M1000 VGND a_118_297# X VNB nshort w=420000u l=150000u
@@ -42,4 +57,3 @@
 M1019 X a_118_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hdll__clkinv_1.spice b/cells/clkinv/sky130_fd_sc_hdll__clkinv_1.spice
index 09de65b..18ce131 100644
--- a/cells/clkinv/sky130_fd_sc_hdll__clkinv_1.spice
+++ b/cells/clkinv/sky130_fd_sc_hdll__clkinv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinv_1 A VGND VNB VPB VPWR Y
 M1000 VGND A Y VNB nshort w=420000u l=150000u
@@ -8,4 +23,3 @@
 M1002 VPWR A Y VPB phighvt w=840000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hdll__clkinv_12.spice b/cells/clkinv/sky130_fd_sc_hdll__clkinv_12.spice
index 1b0c071..6c139b7 100644
--- a/cells/clkinv/sky130_fd_sc_hdll__clkinv_12.spice
+++ b/cells/clkinv/sky130_fd_sc_hdll__clkinv_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__clkinv_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_hdll__clkinv_12 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -62,4 +77,3 @@
 M1029 Y A VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hdll__clkinv_16.spice b/cells/clkinv/sky130_fd_sc_hdll__clkinv_16.spice
index 5c19258..d17137f 100644
--- a/cells/clkinv/sky130_fd_sc_hdll__clkinv_16.spice
+++ b/cells/clkinv/sky130_fd_sc_hdll__clkinv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinv_16 A VGND VNB VPB VPWR Y
 M1000 Y A VGND VNB nshort w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hdll__clkinv_2.spice b/cells/clkinv/sky130_fd_sc_hdll__clkinv_2.spice
index 0a300d9..c9a0d76 100644
--- a/cells/clkinv/sky130_fd_sc_hdll__clkinv_2.spice
+++ b/cells/clkinv/sky130_fd_sc_hdll__clkinv_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinv_2 A VGND VNB VPB VPWR Y
 M1000 VGND A Y VNB nshort w=420000u l=150000u
@@ -12,4 +27,3 @@
 M1004 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hdll__clkinv_4.spice b/cells/clkinv/sky130_fd_sc_hdll__clkinv_4.spice
index a5e121a..eb5065f 100644
--- a/cells/clkinv/sky130_fd_sc_hdll__clkinv_4.spice
+++ b/cells/clkinv/sky130_fd_sc_hdll__clkinv_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinv_4 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinv/sky130_fd_sc_hdll__clkinv_8.spice b/cells/clkinv/sky130_fd_sc_hdll__clkinv_8.spice
index 0007010..4b5e3e0 100644
--- a/cells/clkinv/sky130_fd_sc_hdll__clkinv_8.spice
+++ b/cells/clkinv/sky130_fd_sc_hdll__clkinv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinv_8 A VGND VNB VPB VPWR Y
 M1000 VGND A Y VNB nshort w=420000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND A Y VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_2.spice b/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_2.spice
index 9181cae..eeaaa3a 100644
--- a/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_2.spice
+++ b/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinvlp_2 A VGND VNB VPB VPWR Y
 M1000 Y A a_150_67# VNB nshort w=550000u l=150000u
@@ -10,4 +25,3 @@
 M1003 Y A VPWR VPB phighvt w=1e+06u l=250000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_4.spice b/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_4.spice
index 682ad40..748820b 100644
--- a/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_4.spice
+++ b/cells/clkinvlp/sky130_fd_sc_hdll__clkinvlp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__clkinvlp_4 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=250000u
@@ -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/clkmux2/sky130_fd_sc_hdll__clkmux2_1.spice b/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_1.spice
index 88cc169..fb7e8cb 100644
--- a/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_1.spice
+++ b/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__clkmux2_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_hdll__clkmux2_1 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_245_47# S VGND VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VGND a_79_21# X VNB nshort w=520000u l=150000u
 +  ad=0p pd=0u as=1.352e+11p ps=1.56e+06u
 .ends
-
diff --git a/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_2.spice b/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_2.spice
index 20ee9c5..43a5e7f 100644
--- a/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_2.spice
+++ b/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__clkmux2_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_hdll__clkmux2_2 A0 A1 S VGND VNB VPB VPWR X
 M1000 VPWR a_79_199# X VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 a_79_199# A1 a_337_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_4.spice b/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_4.spice
index 0e4879b..612dea1 100644
--- a/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_4.spice
+++ b/cells/clkmux2/sky130_fd_sc_hdll__clkmux2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__clkmux2_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_hdll__clkmux2_4 A0 A1 S VGND VNB VPB VPWR X
 M1000 VPWR a_79_199# X VPB phighvt w=1e+06u l=180000u
@@ -38,4 +53,3 @@
 M1017 VPWR a_925_21# a_875_309# VPB phighvt w=940000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/conb/sky130_fd_sc_hdll__conb_1.spice b/cells/conb/sky130_fd_sc_hdll__conb_1.spice
index d39925c..126b0e7 100644
--- a/cells/conb/sky130_fd_sc_hdll__conb_1.spice
+++ b/cells/conb/sky130_fd_sc_hdll__conb_1.spice
@@ -1,7 +1,21 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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_hdll__decap_12.spice b/cells/decap/sky130_fd_sc_hdll__decap_12.spice
index 6270460..1c590d1 100644
--- a/cells/decap/sky130_fd_sc_hdll__decap_12.spice
+++ b/cells/decap/sky130_fd_sc_hdll__decap_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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_hdll__decap_3.spice b/cells/decap/sky130_fd_sc_hdll__decap_3.spice
index e63e6aa..beb527b 100644
--- a/cells/decap/sky130_fd_sc_hdll__decap_3.spice
+++ b/cells/decap/sky130_fd_sc_hdll__decap_3.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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_hdll__decap_4.spice b/cells/decap/sky130_fd_sc_hdll__decap_4.spice
index 224670b..f249490 100644
--- a/cells/decap/sky130_fd_sc_hdll__decap_4.spice
+++ b/cells/decap/sky130_fd_sc_hdll__decap_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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_hdll__decap_6.spice b/cells/decap/sky130_fd_sc_hdll__decap_6.spice
index 832fa40..73c7c2c 100644
--- a/cells/decap/sky130_fd_sc_hdll__decap_6.spice
+++ b/cells/decap/sky130_fd_sc_hdll__decap_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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_hdll__decap_8.spice b/cells/decap/sky130_fd_sc_hdll__decap_8.spice
index 5e61c72..8968797 100644
--- a/cells/decap/sky130_fd_sc_hdll__decap_8.spice
+++ b/cells/decap/sky130_fd_sc_hdll__decap_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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/dfrtp/sky130_fd_sc_hdll__dfrtp_1.spice b/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_1.spice
index 69d6dfb..cdbdde5 100644
--- a/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_1.spice
+++ b/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dfrtp_1 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_436_413# D VPWR VPB phighvt w=420000u l=180000u
@@ -58,4 +73,3 @@
 M1027 a_1330_413# a_211_363# a_1128_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_2.spice b/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_2.spice
index 43976e1..55ad721 100644
--- a/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_2.spice
+++ b/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dfrtp_2 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_436_413# D VPWR VPB phighvt w=420000u l=180000u
@@ -62,4 +77,3 @@
 M1029 a_1330_413# a_211_363# a_1128_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_4.spice b/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_4.spice
index f4d5df6..c266e93 100644
--- a/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_4.spice
+++ b/cells/dfrtp/sky130_fd_sc_hdll__dfrtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dfrtp_4 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_699_413# a_27_47# a_583_47# VPB phighvt w=420000u l=180000u
@@ -70,4 +85,3 @@
 M1033 a_699_413# RESET_B VPWR VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hdll__dfstp_1.spice b/cells/dfstp/sky130_fd_sc_hdll__dfstp_1.spice
index cba5b73..2620bfd 100644
--- a/cells/dfstp/sky130_fd_sc_hdll__dfstp_1.spice
+++ b/cells/dfstp/sky130_fd_sc_hdll__dfstp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dfstp_1 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 VPWR SET_B a_1126_413# VPB phighvt w=420000u l=180000u
@@ -66,4 +81,3 @@
 M1031 VGND SET_B a_1416_47# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hdll__dfstp_2.spice b/cells/dfstp/sky130_fd_sc_hdll__dfstp_2.spice
index 91c35a3..08c35f9 100644
--- a/cells/dfstp/sky130_fd_sc_hdll__dfstp_2.spice
+++ b/cells/dfstp/sky130_fd_sc_hdll__dfstp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dfstp_2 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 VPWR SET_B a_1126_413# VPB phighvt w=420000u l=180000u
@@ -70,4 +85,3 @@
 M1033 Q a_1738_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hdll__dfstp_4.spice b/cells/dfstp/sky130_fd_sc_hdll__dfstp_4.spice
index 1f4ae44..5245009 100644
--- a/cells/dfstp/sky130_fd_sc_hdll__dfstp_4.spice
+++ b/cells/dfstp/sky130_fd_sc_hdll__dfstp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dfstp_4 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 VPWR SET_B a_1126_413# VPB phighvt w=420000u l=180000u
@@ -82,4 +97,3 @@
 M1039 VGND a_1738_47# Q VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/diode/sky130_fd_sc_hdll__diode_2.spice b/cells/diode/sky130_fd_sc_hdll__diode_2.spice
index 8c030fc..ec4a046 100644
--- a/cells/diode/sky130_fd_sc_hdll__diode_2.spice
+++ b/cells/diode/sky130_fd_sc_hdll__diode_2.spice
@@ -1,6 +1,20 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__diode_2 DIODE VGND VNB VPB VPWR
 D0 VNB DIODE ndiode p=5.36e+06u a=4.347e+11p
 .ends
-
diff --git a/cells/diode/sky130_fd_sc_hdll__diode_4.spice b/cells/diode/sky130_fd_sc_hdll__diode_4.spice
index 3971548..ffde883 100644
--- a/cells/diode/sky130_fd_sc_hdll__diode_4.spice
+++ b/cells/diode/sky130_fd_sc_hdll__diode_4.spice
@@ -1,6 +1,20 @@
-* NGSPICE file created from sky130_fd_sc_hdll__diode_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_hdll__diode_4 DIODE VGND VNB VPB VPWR
 D0 VNB DIODE ndiode p=9.88e+06u a=1.0557e+12p
 .ends
-
diff --git a/cells/diode/sky130_fd_sc_hdll__diode_6.spice b/cells/diode/sky130_fd_sc_hdll__diode_6.spice
index 65aa317..dda7cda 100644
--- a/cells/diode/sky130_fd_sc_hdll__diode_6.spice
+++ b/cells/diode/sky130_fd_sc_hdll__diode_6.spice
@@ -1,6 +1,20 @@
-* NGSPICE file created from sky130_fd_sc_hdll__diode_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_hdll__diode_6 DIODE VGND VNB VPB VPWR
 D0 VNB DIODE ndiode p=1.47e+07u a=2.2032e+12p
 .ends
-
diff --git a/cells/diode/sky130_fd_sc_hdll__diode_8.spice b/cells/diode/sky130_fd_sc_hdll__diode_8.spice
index e56f7f2..226ef24 100644
--- a/cells/diode/sky130_fd_sc_hdll__diode_8.spice
+++ b/cells/diode/sky130_fd_sc_hdll__diode_8.spice
@@ -1,6 +1,20 @@
-* NGSPICE file created from sky130_fd_sc_hdll__diode_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_hdll__diode_8 DIODE VGND VNB VPB VPWR
 D0 VNB DIODE ndiode p=1.858e+07u a=3.5464e+12p
 .ends
-
diff --git a/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_1.spice b/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_1.spice
index 3515574..07b99ed 100644
--- a/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_1.spice
+++ b/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlrtn_1 D GATE_N RESET_B VGND VNB VPB VPWR Q
 M1000 VGND a_750_21# a_708_47# VNB nshort w=420000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_750_21# a_604_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_2.spice b/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_2.spice
index fb28152..252035a 100644
--- a/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_2.spice
+++ b/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlrtn_2 D GATE_N RESET_B VGND VNB VPB VPWR Q
 M1000 VGND a_750_21# a_708_47# VNB nshort w=420000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_750_21# a_604_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_4.spice b/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_4.spice
index 06bada9..df99761 100644
--- a/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_4.spice
+++ b/cells/dlrtn/sky130_fd_sc_hdll__dlrtn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlrtn_4 D GATE_N RESET_B VGND VNB VPB VPWR Q
 M1000 Q a_750_21# VGND VNB nshort w=650000u l=150000u
@@ -54,4 +69,3 @@
 M1025 VGND a_750_21# Q VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_1.spice b/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_1.spice
index cce25e5..ef7782c 100644
--- a/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_1.spice
+++ b/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlrtp_1 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 VGND a_750_21# a_708_47# VNB nshort w=420000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_750_21# a_604_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_2.spice b/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_2.spice
index def0865..ce56ef2 100644
--- a/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_2.spice
+++ b/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlrtp_2 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 VGND a_750_21# a_708_47# VNB nshort w=420000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_750_21# a_604_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_4.spice b/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_4.spice
index e27d48a..9842579 100644
--- a/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_4.spice
+++ b/cells/dlrtp/sky130_fd_sc_hdll__dlrtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlrtp_4 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 Q a_750_21# VGND VNB nshort w=650000u l=150000u
@@ -54,4 +69,3 @@
 M1025 VGND a_750_21# Q VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_1.spice b/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_1.spice
index 764bdbd..11c1c1b 100644
--- a/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_1.spice
+++ b/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlxtn_1 D GATE_N VGND VNB VPB VPWR Q
 M1000 a_211_363# a_27_47# VGND VNB nshort w=420000u l=150000u
@@ -38,4 +53,3 @@
 M1017 a_607_47# a_211_363# a_503_369# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_2.spice b/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_2.spice
index 919c75b..7df0162 100644
--- a/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_2.spice
+++ b/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlxtn_2 D GATE_N VGND VNB VPB VPWR Q
 M1000 a_211_363# a_27_47# VGND VNB nshort w=420000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VPWR a_783_21# a_739_413# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_4.spice b/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_4.spice
index 6c6416f..1196c4f 100644
--- a/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_4.spice
+++ b/cells/dlxtn/sky130_fd_sc_hdll__dlxtn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlxtn_4 D GATE_N VGND VNB VPB VPWR Q
 M1000 a_709_47# a_211_363# a_609_413# VNB nshort w=360000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VPWR a_774_21# Q VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlygate4sd1/sky130_fd_sc_hdll__dlygate4sd1_1.spice b/cells/dlygate4sd1/sky130_fd_sc_hdll__dlygate4sd1_1.spice
index cb187b2..c3f834f 100644
--- a/cells/dlygate4sd1/sky130_fd_sc_hdll__dlygate4sd1_1.spice
+++ b/cells/dlygate4sd1/sky130_fd_sc_hdll__dlygate4sd1_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlygate4sd1_1 A VGND VNB VPB VPWR X
 M1000 a_213_47# a_27_47# VGND VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR A a_27_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=1.176e+11p ps=1.4e+06u
 .ends
-
diff --git a/cells/dlygate4sd2/sky130_fd_sc_hdll__dlygate4sd2_1.spice b/cells/dlygate4sd2/sky130_fd_sc_hdll__dlygate4sd2_1.spice
index c321978..e650b0b 100644
--- a/cells/dlygate4sd2/sky130_fd_sc_hdll__dlygate4sd2_1.spice
+++ b/cells/dlygate4sd2/sky130_fd_sc_hdll__dlygate4sd2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlygate4sd2_1 A VGND VNB VPB VPWR X
 M1000 a_213_47# a_27_47# VGND VNB nshort w=420000u l=180000u
@@ -18,4 +33,3 @@
 M1007 VPWR A a_27_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=1.176e+11p ps=1.4e+06u
 .ends
-
diff --git a/cells/dlygate4sd3/sky130_fd_sc_hdll__dlygate4sd3_1.spice b/cells/dlygate4sd3/sky130_fd_sc_hdll__dlygate4sd3_1.spice
index 0f56be5..790c485 100644
--- a/cells/dlygate4sd3/sky130_fd_sc_hdll__dlygate4sd3_1.spice
+++ b/cells/dlygate4sd3/sky130_fd_sc_hdll__dlygate4sd3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__dlygate4sd3_1 A VGND VNB VPB VPWR X
 M1000 VPWR a_273_47# a_379_93# VPB phighvt w=420000u l=500000u
@@ -18,4 +33,3 @@
 M1007 a_273_47# a_27_47# VPWR VPB phighvt w=420000u l=500000u
 +  ad=1.092e+11p pd=1.36e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hdll__ebufn_1.spice b/cells/ebufn/sky130_fd_sc_hdll__ebufn_1.spice
index 1301a48..5b31b14 100644
--- a/cells/ebufn/sky130_fd_sc_hdll__ebufn_1.spice
+++ b/cells/ebufn/sky130_fd_sc_hdll__ebufn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__ebufn_1 A TE_B VGND VNB VPB VPWR Z
 M1000 Z a_27_47# a_543_47# VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_211_369# TE_B VPWR VPB phighvt w=640000u l=180000u
 +  ad=1.728e+11p pd=1.82e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hdll__ebufn_2.spice b/cells/ebufn/sky130_fd_sc_hdll__ebufn_2.spice
index 50c7e13..dd49f1f 100644
--- a/cells/ebufn/sky130_fd_sc_hdll__ebufn_2.spice
+++ b/cells/ebufn/sky130_fd_sc_hdll__ebufn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__ebufn_2 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR A a_27_47# VPB phighvt w=640000u l=180000u
@@ -26,4 +41,3 @@
 M1011 Z a_27_47# a_412_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hdll__ebufn_4.spice b/cells/ebufn/sky130_fd_sc_hdll__ebufn_4.spice
index 1c6d803..5d8ec0a 100644
--- a/cells/ebufn/sky130_fd_sc_hdll__ebufn_4.spice
+++ b/cells/ebufn/sky130_fd_sc_hdll__ebufn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__ebufn_4 A TE_B VGND VNB VPB VPWR Z
 M1000 a_340_309# a_27_47# Z VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 a_413_47# a_27_47# Z VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/ebufn/sky130_fd_sc_hdll__ebufn_8.spice b/cells/ebufn/sky130_fd_sc_hdll__ebufn_8.spice
index a899925..16d02ed 100644
--- a/cells/ebufn/sky130_fd_sc_hdll__ebufn_8.spice
+++ b/cells/ebufn/sky130_fd_sc_hdll__ebufn_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__ebufn_8 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_437_309# VPB phighvt w=940000u l=180000u
@@ -78,4 +93,3 @@
 M1037 Z a_124_297# a_485_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hdll__einvn_1.spice b/cells/einvn/sky130_fd_sc_hdll__einvn_1.spice
index b26b704..7ecdf55 100644
--- a/cells/einvn/sky130_fd_sc_hdll__einvn_1.spice
+++ b/cells/einvn/sky130_fd_sc_hdll__einvn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvn_1 A TE_B VGND VNB VPB VPWR Z
 M1000 a_316_47# a_27_47# VGND VNB nshort w=650000u l=150000u
@@ -14,4 +29,3 @@
 M1005 Z A a_316_47# VNB nshort w=650000u l=150000u
 +  ad=2.015e+11p pd=1.92e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hdll__einvn_2.spice b/cells/einvn/sky130_fd_sc_hdll__einvn_2.spice
index 0fd9860..a887da8 100644
--- a/cells/einvn/sky130_fd_sc_hdll__einvn_2.spice
+++ b/cells/einvn/sky130_fd_sc_hdll__einvn_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvn_2 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_222_309# VPB phighvt w=940000u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_222_309# A Z VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hdll__einvn_4.spice b/cells/einvn/sky130_fd_sc_hdll__einvn_4.spice
index ca843de..eca6715 100644
--- a/cells/einvn/sky130_fd_sc_hdll__einvn_4.spice
+++ b/cells/einvn/sky130_fd_sc_hdll__einvn_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvn_4 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_222_309# VPB phighvt w=940000u l=180000u
@@ -38,4 +53,3 @@
 M1017 Z A a_222_309# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hdll__einvn_8.spice b/cells/einvn/sky130_fd_sc_hdll__einvn_8.spice
index d2d8f0f..baf123d 100644
--- a/cells/einvn/sky130_fd_sc_hdll__einvn_8.spice
+++ b/cells/einvn/sky130_fd_sc_hdll__einvn_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvn_8 A TE_B VGND VNB VPB VPWR Z
 M1000 VPWR TE_B a_222_309# VPB phighvt w=940000u l=180000u
@@ -70,4 +85,3 @@
 M1033 a_235_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_hdll__einvp_1.spice b/cells/einvp/sky130_fd_sc_hdll__einvp_1.spice
index 4170400..2f847cf 100644
--- a/cells/einvp/sky130_fd_sc_hdll__einvp_1.spice
+++ b/cells/einvp/sky130_fd_sc_hdll__einvp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvp_1 A TE VGND VNB VPB VPWR Z
 M1000 a_332_297# a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__einvp_2.spice b/cells/einvp/sky130_fd_sc_hdll__einvp_2.spice
index d17e816..43fbeb0 100644
--- a/cells/einvp/sky130_fd_sc_hdll__einvp_2.spice
+++ b/cells/einvp/sky130_fd_sc_hdll__einvp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvp_2 A TE VGND VNB VPB VPWR Z
 M1000 Z A a_214_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_235_309# a_27_47# VPWR VPB phighvt w=940000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hdll__einvp_4.spice b/cells/einvp/sky130_fd_sc_hdll__einvp_4.spice
index 9e67417..e330ed3 100644
--- a/cells/einvp/sky130_fd_sc_hdll__einvp_4.spice
+++ b/cells/einvp/sky130_fd_sc_hdll__einvp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvp_4 A TE VGND VNB VPB VPWR Z
 M1000 a_213_47# TE VGND VNB nshort w=650000u l=150000u
@@ -38,4 +53,3 @@
 M1017 Z A a_235_309# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hdll__einvp_8.spice b/cells/einvp/sky130_fd_sc_hdll__einvp_8.spice
index 3400f0b..5e8a49e 100644
--- a/cells/einvp/sky130_fd_sc_hdll__einvp_8.spice
+++ b/cells/einvp/sky130_fd_sc_hdll__einvp_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__einvp_8 A TE VGND VNB VPB VPWR Z
 M1000 Z A a_235_309# VPB phighvt w=1e+06u l=180000u
@@ -70,4 +85,3 @@
 M1033 a_235_309# a_27_47# VPWR VPB phighvt w=940000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hdll__fill_1.spice b/cells/fill/sky130_fd_sc_hdll__fill_1.spice
index 4abdcdc..5fe0185 100644
--- a/cells/fill/sky130_fd_sc_hdll__fill_1.spice
+++ b/cells/fill/sky130_fd_sc_hdll__fill_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__fill_1 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hdll__fill_2.spice b/cells/fill/sky130_fd_sc_hdll__fill_2.spice
index 08a66f2..9acff63 100644
--- a/cells/fill/sky130_fd_sc_hdll__fill_2.spice
+++ b/cells/fill/sky130_fd_sc_hdll__fill_2.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__fill_2 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hdll__fill_4.spice b/cells/fill/sky130_fd_sc_hdll__fill_4.spice
index 7813835..de75d1c 100644
--- a/cells/fill/sky130_fd_sc_hdll__fill_4.spice
+++ b/cells/fill/sky130_fd_sc_hdll__fill_4.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__fill_4 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hdll__fill_8.spice b/cells/fill/sky130_fd_sc_hdll__fill_8.spice
index 11bb58d..5b78386 100644
--- a/cells/fill/sky130_fd_sc_hdll__fill_8.spice
+++ b/cells/fill/sky130_fd_sc_hdll__fill_8.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__fill_8 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/inputiso0n/sky130_fd_sc_hdll__inputiso0n_1.spice b/cells/inputiso0n/sky130_fd_sc_hdll__inputiso0n_1.spice
index a37387d..e39f906 100644
--- a/cells/inputiso0n/sky130_fd_sc_hdll__inputiso0n_1.spice
+++ b/cells/inputiso0n/sky130_fd_sc_hdll__inputiso0n_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inputiso0n_1 A SLEEP_B VGND VNB VPB VPWR X
 M1000 X a_27_75# VPWR VPB phighvt w=1e+06u l=180000u
@@ -14,4 +29,3 @@
 M1005 a_123_75# A a_27_75# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.386e+11p ps=1.5e+06u
 .ends
-
diff --git a/cells/inputiso0p/sky130_fd_sc_hdll__inputiso0p_1.spice b/cells/inputiso0p/sky130_fd_sc_hdll__inputiso0p_1.spice
index 3bf0074..8454707 100644
--- a/cells/inputiso0p/sky130_fd_sc_hdll__inputiso0p_1.spice
+++ b/cells/inputiso0p/sky130_fd_sc_hdll__inputiso0p_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inputiso0p_1 A SLEEP VGND VNB VPB VPWR X
 M1000 VGND A a_307_47# VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_307_47# a_27_413# a_211_413# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.092e+11p ps=1.36e+06u
 .ends
-
diff --git a/cells/inputiso1n/sky130_fd_sc_hdll__inputiso1n_1.spice b/cells/inputiso1n/sky130_fd_sc_hdll__inputiso1n_1.spice
index 315a009..7978522 100644
--- a/cells/inputiso1n/sky130_fd_sc_hdll__inputiso1n_1.spice
+++ b/cells/inputiso1n/sky130_fd_sc_hdll__inputiso1n_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inputiso1n_1 A SLEEP_B VGND VNB VPB VPWR X
 M1000 VGND SLEEP_B a_27_53# VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 X a_229_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=2.9e+11p pd=2.58e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/inputiso1p/sky130_fd_sc_hdll__inputiso1p_1.spice b/cells/inputiso1p/sky130_fd_sc_hdll__inputiso1p_1.spice
index 5c37717..44623a1 100644
--- a/cells/inputiso1p/sky130_fd_sc_hdll__inputiso1p_1.spice
+++ b/cells/inputiso1p/sky130_fd_sc_hdll__inputiso1p_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inputiso1p_1 A SLEEP VGND VNB VPB VPWR X
 M1000 a_44_297# A VGND VNB nshort w=420000u l=150000u
@@ -14,4 +29,3 @@
 M1005 X a_44_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=4.1e+11p pd=2.82e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hdll__inv_1.spice b/cells/inv/sky130_fd_sc_hdll__inv_1.spice
index 665c1ba..0b2741f 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_1.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__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=180000u
 +  ad=2.7e+11p pd=2.54e+06u as=2.7e+11p ps=2.54e+06u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hdll__inv_12.spice b/cells/inv/sky130_fd_sc_hdll__inv_12.spice
index 620e8a5..a51955e 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_12.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inv_12 A VGND VNB VPB VPWR Y
 M1000 Y A VGND VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 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_hdll__inv_16.spice b/cells/inv/sky130_fd_sc_hdll__inv_16.spice
index 0ccc27d..c391909 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_16.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inv_16 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hdll__inv_2.spice b/cells/inv/sky130_fd_sc_hdll__inv_2.spice
index e435fd2..20b38a2 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_2.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inv_2 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phighvt w=1e+06u l=180000u
@@ -10,4 +25,3 @@
 M1003 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hdll__inv_4.spice b/cells/inv/sky130_fd_sc_hdll__inv_4.spice
index dcee032..22d5748 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_4.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inv_4 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 Y A VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hdll__inv_6.spice b/cells/inv/sky130_fd_sc_hdll__inv_6.spice
index 700bfef..1e1c3e0 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_6.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inv_6 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__inv_8.spice b/cells/inv/sky130_fd_sc_hdll__inv_8.spice
index 21b5738..a997950 100644
--- a/cells/inv/sky130_fd_sc_hdll__inv_8.spice
+++ b/cells/inv/sky130_fd_sc_hdll__inv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__inv_8 A VGND VNB VPB VPWR Y
 M1000 Y A VGND VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 VGND A Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_1.spice b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_1.spice
index 250451b..60cfafa 100644
--- a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_1.spice
+++ b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__isobufsrc_1 A SLEEP VGND VNB VPB VPWR X
 M1000 VGND a_74_47# X VNB nshort w=650000u l=150000u
@@ -14,4 +29,3 @@
 M1005 VPWR A a_74_47# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=1.134e+11p ps=1.38e+06u
 .ends
-
diff --git a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_16.spice b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_16.spice
index a21be5e..eab1721 100644
--- a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_16.spice
+++ b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__isobufsrc_16 A SLEEP VGND VNB VPB VPWR X
 M1000 X SLEEP a_585_297# VPB phighvt w=1e+06u l=180000u
@@ -146,4 +161,3 @@
 M1071 VGND SLEEP X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_2.spice b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_2.spice
index e9d6c10..0e22013 100644
--- a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_2.spice
+++ b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__isobufsrc_2 A SLEEP VGND VNB VPB VPWR X
 M1000 VPWR SLEEP a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VGND SLEEP X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_4.spice b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_4.spice
index 51038c3..3cdf866 100644
--- a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_4.spice
+++ b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__isobufsrc_4 A SLEEP VGND VNB VPB VPWR X
 M1000 X a_459_21# a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -38,4 +53,3 @@
 M1017 a_27_297# a_459_21# X VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_8.spice b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_8.spice
index 19581ab..3ac5e33 100644
--- a/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_8.spice
+++ b/cells/isobufsrc/sky130_fd_sc_hdll__isobufsrc_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__isobufsrc_8 A SLEEP VGND VNB VPB VPWR X
 M1000 VPWR a_117_297# a_345_297# VPB phighvt w=1e+06u l=180000u
@@ -74,4 +89,3 @@
 M1035 X SLEEP a_345_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hdll__mux2_1.spice b/cells/mux2/sky130_fd_sc_hdll__mux2_1.spice
index 20e9f48..2256115 100644
--- a/cells/mux2/sky130_fd_sc_hdll__mux2_1.spice
+++ b/cells/mux2/sky130_fd_sc_hdll__mux2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2_1 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_245_47# S VGND VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_657_21# S VPWR VPB phighvt w=420000u l=180000u
 +  ad=1.218e+11p pd=1.42e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hdll__mux2_12.spice b/cells/mux2/sky130_fd_sc_hdll__mux2_12.spice
index 8302c03..17b678d 100644
--- a/cells/mux2/sky130_fd_sc_hdll__mux2_12.spice
+++ b/cells/mux2/sky130_fd_sc_hdll__mux2_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__mux2_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_hdll__mux2_12 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_119_47# S VGND VNB nshort w=650000u l=150000u
@@ -122,4 +137,3 @@
 M1059 X a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hdll__mux2_16.spice b/cells/mux2/sky130_fd_sc_hdll__mux2_16.spice
index 3ad4132..df2da26 100644
--- a/cells/mux2/sky130_fd_sc_hdll__mux2_16.spice
+++ b/cells/mux2/sky130_fd_sc_hdll__mux2_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__mux2_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_hdll__mux2_16 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_119_47# S VGND VNB nshort w=650000u l=150000u
@@ -138,4 +153,3 @@
 M1067 X a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hdll__mux2_2.spice b/cells/mux2/sky130_fd_sc_hdll__mux2_2.spice
index 5d8f20c..6f8bf01 100644
--- a/cells/mux2/sky130_fd_sc_hdll__mux2_2.spice
+++ b/cells/mux2/sky130_fd_sc_hdll__mux2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2_2 A0 A1 S VGND VNB VPB VPWR X
 M1000 VPWR a_79_21# X VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 a_280_21# S VGND VNB nshort w=420000u l=150000u
 +  ad=1.155e+11p pd=1.39e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hdll__mux2_4.spice b/cells/mux2/sky130_fd_sc_hdll__mux2_4.spice
index eaeff25..68a375e 100644
--- a/cells/mux2/sky130_fd_sc_hdll__mux2_4.spice
+++ b/cells/mux2/sky130_fd_sc_hdll__mux2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2_4 A0 A1 S VGND VNB VPB VPWR X
 M1000 VPWR a_424_297# X VPB phighvt w=1e+06u l=180000u
@@ -38,4 +53,3 @@
 M1017 VGND a_424_297# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hdll__mux2_8.spice b/cells/mux2/sky130_fd_sc_hdll__mux2_8.spice
index 668c3f7..6e70b84 100644
--- a/cells/mux2/sky130_fd_sc_hdll__mux2_8.spice
+++ b/cells/mux2/sky130_fd_sc_hdll__mux2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2_8 A0 A1 S VGND VNB VPB VPWR X
 M1000 VPWR a_79_21# X VPB phighvt w=1e+06u l=180000u
@@ -70,4 +85,3 @@
 M1033 VPWR S a_870_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2i/sky130_fd_sc_hdll__mux2i_1.spice b/cells/mux2i/sky130_fd_sc_hdll__mux2i_1.spice
index 04a331b..b333932 100644
--- a/cells/mux2i/sky130_fd_sc_hdll__mux2i_1.spice
+++ b/cells/mux2i/sky130_fd_sc_hdll__mux2i_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2i_1 A0 A1 S VGND VNB VPB VPWR Y
 M1000 Y A0 a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_207_47# S VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2i/sky130_fd_sc_hdll__mux2i_2.spice b/cells/mux2i/sky130_fd_sc_hdll__mux2i_2.spice
index 71195f1..f75a573 100644
--- a/cells/mux2i/sky130_fd_sc_hdll__mux2i_2.spice
+++ b/cells/mux2i/sky130_fd_sc_hdll__mux2i_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2i_2 A0 A1 S VGND VNB VPB VPWR Y
 M1000 Y A0 a_401_47# VNB nshort w=650000u l=150000u
@@ -38,4 +53,3 @@
 M1017 Y A1 a_213_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2i/sky130_fd_sc_hdll__mux2i_4.spice b/cells/mux2i/sky130_fd_sc_hdll__mux2i_4.spice
index eea4369..c65c7b9 100644
--- a/cells/mux2i/sky130_fd_sc_hdll__mux2i_4.spice
+++ b/cells/mux2i/sky130_fd_sc_hdll__mux2i_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__mux2i_4 A0 A1 S VGND VNB VPB VPWR Y
 M1000 Y A1 a_493_297# VPB phighvt w=1e+06u l=180000u
@@ -70,4 +85,3 @@
 M1033 a_1311_21# S VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=2.7e+11p pd=2.54e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_1.spice b/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_1.spice
index 0423812..127a4af 100644
--- a/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_1.spice
+++ b/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb16to1_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_hdll__muxb16to1_1 D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8]
 + D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] S[15] S[14] S[13] S[12] S[11] S[10] S[9]
@@ -196,4 +211,3 @@
 M1095 a_3017_47# S[7] VGND VNB nshort w=520000u l=150000u
 +  ad=1.482e+11p pd=1.61e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_2.spice b/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_2.spice
index 0b8a19c..7916da8 100644
--- a/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_2.spice
+++ b/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb16to1_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_hdll__muxb16to1_2 D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8]
 + D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] S[15] S[14] S[13] S[12] S[11] S[10] S[9]
@@ -324,4 +339,3 @@
 M1159 Z a_2854_793# a_2603_591# VPB phighvt w=820000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_4.spice b/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_4.spice
index 125da95..0af703d 100644
--- a/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_4.spice
+++ b/cells/muxb16to1/sky130_fd_sc_hdll__muxb16to1_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb16to1_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_hdll__muxb16to1_4 D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8]
 + D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] S[15] S[14] S[13] S[12] S[11] S[10] S[9]
@@ -644,4 +659,3 @@
 M1319 a_5361_297# D[4] VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_1.spice b/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_1.spice
index 4a2eb87..e8e39c7 100644
--- a/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_1.spice
+++ b/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb4to1_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_hdll__muxb4to1_1 D[3] D[2] D[1] D[0] S[3] S[2] S[1] S[0] VGND
 + VNB VPB VPWR Z
@@ -51,4 +66,3 @@
 M1023 Z S[0] a_109_47# VNB nshort w=520000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_2.spice b/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_2.spice
index d95438f..43aa649 100644
--- a/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_2.spice
+++ b/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb4to1_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_hdll__muxb4to1_2 D[3] D[2] D[1] D[0] S[3] S[2] S[1] S[0] VGND
 + VNB VPB VPWR Z
@@ -83,4 +98,3 @@
 M1039 VGND D[3] a_2133_69# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_4.spice b/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_4.spice
index a72831b..68290e6 100644
--- a/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_4.spice
+++ b/cells/muxb4to1/sky130_fd_sc_hdll__muxb4to1_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb4to1_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_hdll__muxb4to1_4 D[3] D[2] D[1] D[0] S[3] S[2] S[1] S[0] VGND
 + VNB VPB VPWR Z
@@ -163,4 +178,3 @@
 M1079 a_1693_66# D[1] VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_1.spice b/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_1.spice
index de5749c..c4dae0f 100644
--- a/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_1.spice
+++ b/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb8to1_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_hdll__muxb8to1_1 D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] S[7]
 + S[6] S[5] S[4] S[3] S[2] S[1] S[0] VGND VNB VPB VPWR Z
@@ -99,4 +114,3 @@
 M1047 a_3017_47# S[7] VGND VNB nshort w=520000u l=150000u
 +  ad=1.482e+11p pd=1.61e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_2.spice b/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_2.spice
index 55994b9..52db852 100644
--- a/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_2.spice
+++ b/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb8to1_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_hdll__muxb8to1_2 D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] S[7]
 + S[6] S[5] S[4] S[3] S[2] S[1] S[0] VGND VNB VPB VPWR Z
@@ -163,4 +178,3 @@
 M1079 a_3891_47# D[6] VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_4.spice b/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_4.spice
index d114728..76d41fa 100644
--- a/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_4.spice
+++ b/cells/muxb8to1/sky130_fd_sc_hdll__muxb8to1_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__muxb8to1_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_hdll__muxb8to1_4 D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] S[7]
 + S[6] S[5] S[4] S[3] S[2] S[1] S[0] VGND VNB VPB VPWR Z
@@ -323,4 +338,3 @@
 M1159 VGND D[6] a_3799_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hdll__nand2_1.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_1.spice
index 07f1eb9..ed563db 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_1.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2_1 A B VGND VNB VPB VPWR Y
 M1000 Y B VPWR VPB phighvt w=1e+06u l=180000u
@@ -10,4 +25,3 @@
 M1003 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hdll__nand2_12.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_12.spice
index 470104d..c391598 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_12.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_12.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__nand2_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_hdll__nand2_12 A B VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=180000u
@@ -98,4 +113,3 @@
 M1047 Y A VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hdll__nand2_16.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_16.spice
index 6f78860..c638df4 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_16.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__nand2_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_hdll__nand2_16 A B VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=180000u
@@ -130,4 +145,3 @@
 M1063 VPWR A Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hdll__nand2_2.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_2.spice
index 39c7188..471de2d 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_2.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2_2 A B VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__nand2_4.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_4.spice
index 0412308..2b846e7 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_4.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2_4 A B VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__nand2_6.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_6.spice
index 4dacf85..b62d385 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_6.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__nand2_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_hdll__nand2_6 A B VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 Y A 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_hdll__nand2_8.spice b/cells/nand2/sky130_fd_sc_hdll__nand2_8.spice
index b329bca..9f39ab9 100644
--- a/cells/nand2/sky130_fd_sc_hdll__nand2_8.spice
+++ b/cells/nand2/sky130_fd_sc_hdll__nand2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2_8 A B VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 Y A VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2b/sky130_fd_sc_hdll__nand2b_1.spice b/cells/nand2b/sky130_fd_sc_hdll__nand2b_1.spice
index 7982321..9a28a36 100644
--- a/cells/nand2b/sky130_fd_sc_hdll__nand2b_1.spice
+++ b/cells/nand2b/sky130_fd_sc_hdll__nand2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2b_1 A_N B VGND VNB VPB VPWR Y
 M1000 VPWR A_N a_27_93# VPB phighvt w=420000u l=180000u
@@ -14,4 +29,3 @@
 M1005 a_226_47# B VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2b/sky130_fd_sc_hdll__nand2b_2.spice b/cells/nand2b/sky130_fd_sc_hdll__nand2b_2.spice
index 3cd3476..07c0866 100644
--- a/cells/nand2b/sky130_fd_sc_hdll__nand2b_2.spice
+++ b/cells/nand2b/sky130_fd_sc_hdll__nand2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2b_2 A_N B VGND VNB VPB VPWR Y
 M1000 a_215_47# a_27_93# Y VNB nshort w=650000u 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_hdll__nand2b_4.spice b/cells/nand2b/sky130_fd_sc_hdll__nand2b_4.spice
index b20b121..ec8c884 100644
--- a/cells/nand2b/sky130_fd_sc_hdll__nand2b_4.spice
+++ b/cells/nand2b/sky130_fd_sc_hdll__nand2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand2b_4 A_N B VGND VNB VPB VPWR Y
 M1000 VGND B a_225_47# VNB nshort w=650000u l=150000u
@@ -38,4 +53,3 @@
 M1017 Y a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3/sky130_fd_sc_hdll__nand3_1.spice b/cells/nand3/sky130_fd_sc_hdll__nand3_1.spice
index 27502b9..6b54577 100644
--- a/cells/nand3/sky130_fd_sc_hdll__nand3_1.spice
+++ b/cells/nand3/sky130_fd_sc_hdll__nand3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand3_1 A B C VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=180000u
@@ -14,4 +29,3 @@
 M1005 a_119_47# C VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=2.015e+11p ps=1.92e+06u
 .ends
-
diff --git a/cells/nand3/sky130_fd_sc_hdll__nand3_2.spice b/cells/nand3/sky130_fd_sc_hdll__nand3_2.spice
index 50be835..64f640c 100644
--- a/cells/nand3/sky130_fd_sc_hdll__nand3_2.spice
+++ b/cells/nand3/sky130_fd_sc_hdll__nand3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand3_2 A B C VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 a_307_47# B 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_hdll__nand3_4.spice b/cells/nand3/sky130_fd_sc_hdll__nand3_4.spice
index 67edb39..04bc4bc 100644
--- a/cells/nand3/sky130_fd_sc_hdll__nand3_4.spice
+++ b/cells/nand3/sky130_fd_sc_hdll__nand3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand3_4 A B C VGND VNB VPB VPWR Y
 M1000 VPWR B Y VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__nand3b_1.spice b/cells/nand3b/sky130_fd_sc_hdll__nand3b_1.spice
index 49f993d..6173fb9 100644
--- a/cells/nand3b/sky130_fd_sc_hdll__nand3b_1.spice
+++ b/cells/nand3b/sky130_fd_sc_hdll__nand3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand3b_1 A_N B C VGND VNB VPB VPWR Y
 M1000 VPWR A_N a_53_93# VPB phighvt w=420000u l=180000u
@@ -18,4 +33,3 @@
 M1007 Y a_53_93# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3b/sky130_fd_sc_hdll__nand3b_2.spice b/cells/nand3b/sky130_fd_sc_hdll__nand3b_2.spice
index ae257e9..96b35af 100644
--- a/cells/nand3b/sky130_fd_sc_hdll__nand3b_2.spice
+++ b/cells/nand3b/sky130_fd_sc_hdll__nand3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand3b_2 A_N B C VGND VNB VPB VPWR Y
 M1000 VGND C a_228_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_hdll__nand3b_4.spice b/cells/nand3b/sky130_fd_sc_hdll__nand3b_4.spice
index fd6cb2a..6f4cd2e 100644
--- a/cells/nand3b/sky130_fd_sc_hdll__nand3b_4.spice
+++ b/cells/nand3b/sky130_fd_sc_hdll__nand3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand3b_4 A_N B C VGND VNB VPB VPWR Y
 M1000 Y C VPWR VPB phighvt w=1e+06u l=180000u
@@ -54,4 +69,3 @@
 M1025 VPWR B Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4/sky130_fd_sc_hdll__nand4_1.spice b/cells/nand4/sky130_fd_sc_hdll__nand4_1.spice
index 76ae5a5..27dd571 100644
--- a/cells/nand4/sky130_fd_sc_hdll__nand4_1.spice
+++ b/cells/nand4/sky130_fd_sc_hdll__nand4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4_1 A B C D VGND VNB VPB VPWR Y
 M1000 VPWR C Y VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 Y B VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4/sky130_fd_sc_hdll__nand4_2.spice b/cells/nand4/sky130_fd_sc_hdll__nand4_2.spice
index 27be7fe..f61b6b7 100644
--- a/cells/nand4/sky130_fd_sc_hdll__nand4_2.spice
+++ b/cells/nand4/sky130_fd_sc_hdll__nand4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4_2 A B C D VGND VNB VPB VPWR Y
 M1000 VPWR D Y VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 Y C VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4/sky130_fd_sc_hdll__nand4_4.spice b/cells/nand4/sky130_fd_sc_hdll__nand4_4.spice
index 52f0226..2ac6c0c 100644
--- a/cells/nand4/sky130_fd_sc_hdll__nand4_4.spice
+++ b/cells/nand4/sky130_fd_sc_hdll__nand4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4_4 A B C D VGND VNB VPB VPWR Y
 M1000 VPWR C Y VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 VGND D a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4b/sky130_fd_sc_hdll__nand4b_1.spice b/cells/nand4b/sky130_fd_sc_hdll__nand4b_1.spice
index 9fa18c3..100368c 100644
--- a/cells/nand4b/sky130_fd_sc_hdll__nand4b_1.spice
+++ b/cells/nand4b/sky130_fd_sc_hdll__nand4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4b_1 A_N B C D VGND VNB VPB VPWR Y
 M1000 Y B VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_251_47# D VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4b/sky130_fd_sc_hdll__nand4b_2.spice b/cells/nand4b/sky130_fd_sc_hdll__nand4b_2.spice
index df67cf4..b159082 100644
--- a/cells/nand4b/sky130_fd_sc_hdll__nand4b_2.spice
+++ b/cells/nand4b/sky130_fd_sc_hdll__nand4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4b_2 A_N B C D VGND VNB VPB VPWR Y
 M1000 VPWR A_N a_27_47# VPB phighvt w=420000u l=180000u
@@ -38,4 +53,3 @@
 M1017 Y C VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4b/sky130_fd_sc_hdll__nand4b_4.spice b/cells/nand4b/sky130_fd_sc_hdll__nand4b_4.spice
index 72e4a24..4de5112 100644
--- a/cells/nand4b/sky130_fd_sc_hdll__nand4b_4.spice
+++ b/cells/nand4b/sky130_fd_sc_hdll__nand4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4b_4 A_N B C D VGND VNB VPB VPWR Y
 M1000 a_225_47# B a_693_47# VNB nshort w=650000u l=150000u
@@ -70,4 +85,3 @@
 M1033 VPWR B Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_1.spice b/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_1.spice
index 78fb334..ffa27f3 100644
--- a/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_1.spice
+++ b/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4bb_1 A_N B_N C D VGND VNB VPB VPWR Y
 M1000 VPWR B_N a_27_93# VPB phighvt w=420000u l=180000u
@@ -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_hdll__nand4bb_2.spice b/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_2.spice
index a3c79ac..8ed9103 100644
--- a/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_2.spice
+++ b/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4bb_2 A_N B_N C D VGND VNB VPB VPWR Y
 M1000 a_211_413# A_N VGND VNB nshort w=420000u l=150000u
@@ -42,4 +57,3 @@
 M1019 a_641_47# C a_841_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_4.spice b/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_4.spice
index 3bf045d..c0d2feb 100644
--- a/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_4.spice
+++ b/cells/nand4bb/sky130_fd_sc_hdll__nand4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nand4bb_4 A_N B_N C D VGND VNB VPB VPWR Y
 M1000 a_1251_47# C a_853_47# VNB nshort w=650000u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_395_47# a_27_47# Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hdll__nor2_1.spice b/cells/nor2/sky130_fd_sc_hdll__nor2_1.spice
index 5c4195a..3843111 100644
--- a/cells/nor2/sky130_fd_sc_hdll__nor2_1.spice
+++ b/cells/nor2/sky130_fd_sc_hdll__nor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2_1 A B VGND VNB VPB VPWR Y
 M1000 VPWR A a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -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_hdll__nor2_2.spice b/cells/nor2/sky130_fd_sc_hdll__nor2_2.spice
index cb99603..280c287 100644
--- a/cells/nor2/sky130_fd_sc_hdll__nor2_2.spice
+++ b/cells/nor2/sky130_fd_sc_hdll__nor2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2_2 A B VGND VNB VPB VPWR Y
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -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/nor2/sky130_fd_sc_hdll__nor2_4.spice b/cells/nor2/sky130_fd_sc_hdll__nor2_4.spice
index 8aa3292..69edfc5 100644
--- a/cells/nor2/sky130_fd_sc_hdll__nor2_4.spice
+++ b/cells/nor2/sky130_fd_sc_hdll__nor2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2_4 A B VGND VNB VPB VPWR Y
 M1000 Y B a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 a_27_297# B Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hdll__nor2_8.spice b/cells/nor2/sky130_fd_sc_hdll__nor2_8.spice
index 338b9b3..51fda6a 100644
--- a/cells/nor2/sky130_fd_sc_hdll__nor2_8.spice
+++ b/cells/nor2/sky130_fd_sc_hdll__nor2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2_8 A B VGND VNB VPB VPWR Y
 M1000 Y B VGND VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 VGND B Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2b/sky130_fd_sc_hdll__nor2b_1.spice b/cells/nor2b/sky130_fd_sc_hdll__nor2b_1.spice
index b4efa89..61dafbd 100644
--- a/cells/nor2b/sky130_fd_sc_hdll__nor2b_1.spice
+++ b/cells/nor2b/sky130_fd_sc_hdll__nor2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2b_1 A B_N VGND VNB VPB VPWR Y
 M1000 a_253_297# A VPWR VPB phighvt w=1e+06u l=180000u
@@ -14,4 +29,3 @@
 M1005 VGND B_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/nor2b/sky130_fd_sc_hdll__nor2b_2.spice b/cells/nor2b/sky130_fd_sc_hdll__nor2b_2.spice
index a5f3e79..d357c91 100644
--- a/cells/nor2b/sky130_fd_sc_hdll__nor2b_2.spice
+++ b/cells/nor2b/sky130_fd_sc_hdll__nor2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2b_2 A B_N VGND VNB VPB VPWR Y
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VGND B_N a_271_21# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=1.764e+11p ps=1.68e+06u
 .ends
-
diff --git a/cells/nor2b/sky130_fd_sc_hdll__nor2b_4.spice b/cells/nor2b/sky130_fd_sc_hdll__nor2b_4.spice
index 356bf9d..2b1249d 100644
--- a/cells/nor2b/sky130_fd_sc_hdll__nor2b_4.spice
+++ b/cells/nor2b/sky130_fd_sc_hdll__nor2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor2b_4 A B_N VGND VNB VPB VPWR Y
 M1000 Y a_459_21# a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -38,4 +53,3 @@
 M1017 a_27_297# a_459_21# Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hdll__nor3_1.spice b/cells/nor3/sky130_fd_sc_hdll__nor3_1.spice
index 783077c..ca80d63 100644
--- a/cells/nor3/sky130_fd_sc_hdll__nor3_1.spice
+++ b/cells/nor3/sky130_fd_sc_hdll__nor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor3_1 A B C VGND VNB VPB VPWR Y
 M1000 a_211_297# B a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -14,4 +29,3 @@
 M1005 VPWR A a_211_297# VPB phighvt w=1e+06u l=180000u
 +  ad=6.1e+11p pd=3.22e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hdll__nor3_2.spice b/cells/nor3/sky130_fd_sc_hdll__nor3_2.spice
index f988479..2b19300 100644
--- a/cells/nor3/sky130_fd_sc_hdll__nor3_2.spice
+++ b/cells/nor3/sky130_fd_sc_hdll__nor3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor3_2 A B C VGND VNB VPB VPWR Y
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 VGND A Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hdll__nor3_4.spice b/cells/nor3/sky130_fd_sc_hdll__nor3_4.spice
index 04a86cd..6a03eb9 100644
--- a/cells/nor3/sky130_fd_sc_hdll__nor3_4.spice
+++ b/cells/nor3/sky130_fd_sc_hdll__nor3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor3_4 A B C VGND VNB VPB VPWR Y
 M1000 Y C VGND VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VGND C Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3b/sky130_fd_sc_hdll__nor3b_1.spice b/cells/nor3b/sky130_fd_sc_hdll__nor3b_1.spice
index d1ef228..b9e4a55 100644
--- a/cells/nor3b/sky130_fd_sc_hdll__nor3b_1.spice
+++ b/cells/nor3b/sky130_fd_sc_hdll__nor3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor3b_1 A B C_N VGND VNB VPB VPWR Y
 M1000 a_91_199# C_N VGND VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 VPWR A a_263_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3b/sky130_fd_sc_hdll__nor3b_2.spice b/cells/nor3b/sky130_fd_sc_hdll__nor3b_2.spice
index fac2775..a86a3a4 100644
--- a/cells/nor3b/sky130_fd_sc_hdll__nor3b_2.spice
+++ b/cells/nor3b/sky130_fd_sc_hdll__nor3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor3b_2 A B C_N VGND VNB VPB VPWR Y
 M1000 Y a_571_21# a_309_297# VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 a_309_297# a_571_21# Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3b/sky130_fd_sc_hdll__nor3b_4.spice b/cells/nor3b/sky130_fd_sc_hdll__nor3b_4.spice
index da02c18..a16b1ec 100644
--- a/cells/nor3b/sky130_fd_sc_hdll__nor3b_4.spice
+++ b/cells/nor3b/sky130_fd_sc_hdll__nor3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor3b_4 A B C_N VGND VNB VPB VPWR Y
 M1000 VPWR A a_215_297# VPB phighvt w=1e+06u l=180000u
@@ -54,4 +69,3 @@
 M1025 Y a_27_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hdll__nor4_1.spice b/cells/nor4/sky130_fd_sc_hdll__nor4_1.spice
index 3723fbb..e33d6c6 100644
--- a/cells/nor4/sky130_fd_sc_hdll__nor4_1.spice
+++ b/cells/nor4/sky130_fd_sc_hdll__nor4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4_1 A B C D VGND VNB VPB VPWR Y
 M1000 a_221_297# C a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -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/nor4/sky130_fd_sc_hdll__nor4_2.spice b/cells/nor4/sky130_fd_sc_hdll__nor4_2.spice
index 521d225..af3a229 100644
--- a/cells/nor4/sky130_fd_sc_hdll__nor4_2.spice
+++ b/cells/nor4/sky130_fd_sc_hdll__nor4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4_2 A B C D VGND VNB VPB VPWR Y
 M1000 a_309_297# C a_515_297# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 a_515_297# C a_309_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hdll__nor4_4.spice b/cells/nor4/sky130_fd_sc_hdll__nor4_4.spice
index ce77b20..ede0b7a 100644
--- a/cells/nor4/sky130_fd_sc_hdll__nor4_4.spice
+++ b/cells/nor4/sky130_fd_sc_hdll__nor4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4_4 A B C D VGND VNB VPB VPWR Y
 M1000 a_497_297# B a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 Y D a_887_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hdll__nor4_6.spice b/cells/nor4/sky130_fd_sc_hdll__nor4_6.spice
index 0f538df..f21c0b1 100644
--- a/cells/nor4/sky130_fd_sc_hdll__nor4_6.spice
+++ b/cells/nor4/sky130_fd_sc_hdll__nor4_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__nor4_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_hdll__nor4_6 A B C D VGND VNB VPB VPWR Y
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -98,4 +113,3 @@
 M1047 VGND D Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4/sky130_fd_sc_hdll__nor4_8.spice b/cells/nor4/sky130_fd_sc_hdll__nor4_8.spice
index f52aff8..93ddc79 100644
--- a/cells/nor4/sky130_fd_sc_hdll__nor4_8.spice
+++ b/cells/nor4/sky130_fd_sc_hdll__nor4_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__nor4_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_hdll__nor4_8 A B C D VGND VNB VPB VPWR Y
 M1000 a_27_297# A VPWR VPB phighvt w=1e+06u l=180000u
@@ -130,4 +145,3 @@
 M1063 VGND C Y VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4b/sky130_fd_sc_hdll__nor4b_1.spice b/cells/nor4b/sky130_fd_sc_hdll__nor4b_1.spice
index 22ef374..1f39ce6 100644
--- a/cells/nor4b/sky130_fd_sc_hdll__nor4b_1.spice
+++ b/cells/nor4b/sky130_fd_sc_hdll__nor4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4b_1 A B C D_N VGND VNB VPB VPWR Y
 M1000 a_263_297# C a_169_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_369_297# B a_263_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4b/sky130_fd_sc_hdll__nor4b_2.spice b/cells/nor4b/sky130_fd_sc_hdll__nor4b_2.spice
index 39be1b6..5ba79bc 100644
--- a/cells/nor4b/sky130_fd_sc_hdll__nor4b_2.spice
+++ b/cells/nor4b/sky130_fd_sc_hdll__nor4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4b_2 A B C D_N VGND VNB VPB VPWR Y
 M1000 a_27_297# A VPWR VPB phighvt w=1e+06u l=180000u
@@ -38,4 +53,3 @@
 M1017 a_514_297# a_754_21# Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4b/sky130_fd_sc_hdll__nor4b_4.spice b/cells/nor4b/sky130_fd_sc_hdll__nor4b_4.spice
index 0f7d297..7c91e73 100644
--- a/cells/nor4b/sky130_fd_sc_hdll__nor4b_4.spice
+++ b/cells/nor4b/sky130_fd_sc_hdll__nor4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4b_4 A B C D_N VGND VNB VPB VPWR Y
 M1000 a_27_297# B a_493_297# VPB phighvt w=1e+06u l=180000u
@@ -70,4 +85,3 @@
 M1033 Y C VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_1.spice b/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_1.spice
index a5c3647..31c1142 100644
--- a/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_1.spice
+++ b/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4bb_1 A B C_N D_N VGND VNB VPB VPWR Y
 M1000 VGND C_N a_27_410# VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_518_297# a_27_410# a_422_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_2.spice b/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_2.spice
index aad5590..12032f4 100644
--- a/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_2.spice
+++ b/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4bb_2 A B C_N D_N VGND VNB VPB VPWR Y
 M1000 Y a_216_93# VGND VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VGND D_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/nor4bb/sky130_fd_sc_hdll__nor4bb_4.spice b/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_4.spice
index bf8465e..a504fba 100644
--- a/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_4.spice
+++ b/cells/nor4bb/sky130_fd_sc_hdll__nor4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__nor4bb_4 A B C_N D_N VGND VNB VPB VPWR Y
 M1000 Y a_207_47# a_331_297# VPB phighvt w=1e+06u l=180000u
@@ -74,4 +89,3 @@
 M1035 a_331_297# a_27_297# a_797_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211a/sky130_fd_sc_hdll__o211a_1.spice b/cells/o211a/sky130_fd_sc_hdll__o211a_1.spice
index 1da5750..65dd0b7 100644
--- a/cells/o211a/sky130_fd_sc_hdll__o211a_1.spice
+++ b/cells/o211a/sky130_fd_sc_hdll__o211a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o211a_1 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_225_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A1 a_225_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211a/sky130_fd_sc_hdll__o211a_2.spice b/cells/o211a/sky130_fd_sc_hdll__o211a_2.spice
index ff4cc8d..3fa2182 100644
--- a/cells/o211a/sky130_fd_sc_hdll__o211a_2.spice
+++ b/cells/o211a/sky130_fd_sc_hdll__o211a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o211a_2 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 VPWR a_27_47# X VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 VPWR A1 a_406_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211a/sky130_fd_sc_hdll__o211a_4.spice b/cells/o211a/sky130_fd_sc_hdll__o211a_4.spice
index 7c0b543..84abe88 100644
--- a/cells/o211a/sky130_fd_sc_hdll__o211a_4.spice
+++ b/cells/o211a/sky130_fd_sc_hdll__o211a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o211a_4 A1 A2 B1 C1 VGND VNB VPB VPWR X
 M1000 a_524_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 a_818_47# C1 a_80_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211ai/sky130_fd_sc_hdll__o211ai_1.spice b/cells/o211ai/sky130_fd_sc_hdll__o211ai_1.spice
index fa5c7a8..c588a5e 100644
--- a/cells/o211ai/sky130_fd_sc_hdll__o211ai_1.spice
+++ b/cells/o211ai/sky130_fd_sc_hdll__o211ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o211ai_1 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 VGND A1 a_27_47# VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 a_304_47# B1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211ai/sky130_fd_sc_hdll__o211ai_2.spice b/cells/o211ai/sky130_fd_sc_hdll__o211ai_2.spice
index 267f0f6..08e7279 100644
--- a/cells/o211ai/sky130_fd_sc_hdll__o211ai_2.spice
+++ b/cells/o211ai/sky130_fd_sc_hdll__o211ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o211ai_2 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_316_47# B1 a_27_47# VNB nshort w=650000u l=150000u
@@ -34,4 +49,3 @@
 M1015 Y B1 VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o211ai/sky130_fd_sc_hdll__o211ai_4.spice b/cells/o211ai/sky130_fd_sc_hdll__o211ai_4.spice
index eeda2b5..2f3a23c 100644
--- a/cells/o211ai/sky130_fd_sc_hdll__o211ai_4.spice
+++ b/cells/o211ai/sky130_fd_sc_hdll__o211ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o211ai_4 A1 A2 B1 C1 VGND VNB VPB VPWR Y
 M1000 a_27_47# A2 VGND VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 Y C1 VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hdll__o21a_1.spice b/cells/o21a/sky130_fd_sc_hdll__o21a_1.spice
index 111f0e2..18d75ae 100644
--- a/cells/o21a/sky130_fd_sc_hdll__o21a_1.spice
+++ b/cells/o21a/sky130_fd_sc_hdll__o21a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21a_1 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VPWR a_83_21# X VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 a_302_47# A1 VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hdll__o21a_2.spice b/cells/o21a/sky130_fd_sc_hdll__o21a_2.spice
index 3f0a676..51834e1 100644
--- a/cells/o21a/sky130_fd_sc_hdll__o21a_2.spice
+++ b/cells/o21a/sky130_fd_sc_hdll__o21a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21a_2 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 a_79_21# B1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VGND a_79_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hdll__o21a_4.spice b/cells/o21a/sky130_fd_sc_hdll__o21a_4.spice
index a9d2e80..d040da2 100644
--- a/cells/o21a/sky130_fd_sc_hdll__o21a_4.spice
+++ b/cells/o21a/sky130_fd_sc_hdll__o21a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21a_4 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 X a_80_21# VPWR VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 a_1008_297# A2 a_80_21# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hdll__o21ai_1.spice b/cells/o21ai/sky130_fd_sc_hdll__o21ai_1.spice
index e6dbb94..03320d8 100644
--- a/cells/o21ai/sky130_fd_sc_hdll__o21ai_1.spice
+++ b/cells/o21ai/sky130_fd_sc_hdll__o21ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21ai_1 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 VPWR B1 Y VPB phighvt w=700000u l=180000u
@@ -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_hdll__o21ai_2.spice b/cells/o21ai/sky130_fd_sc_hdll__o21ai_2.spice
index 5b24b43..ac2f377 100644
--- a/cells/o21ai/sky130_fd_sc_hdll__o21ai_2.spice
+++ b/cells/o21ai/sky130_fd_sc_hdll__o21ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21ai_2 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_29_47# A1 VGND VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR B1 Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hdll__o21ai_4.spice b/cells/o21ai/sky130_fd_sc_hdll__o21ai_4.spice
index d47cecf..6393947 100644
--- a/cells/o21ai/sky130_fd_sc_hdll__o21ai_4.spice
+++ b/cells/o21ai/sky130_fd_sc_hdll__o21ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21ai_4 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_123_297# A2 Y VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 VPWR A1 a_123_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ba/sky130_fd_sc_hdll__o21ba_1.spice b/cells/o21ba/sky130_fd_sc_hdll__o21ba_1.spice
index 65c1bf7..8cefb13 100644
--- a/cells/o21ba/sky130_fd_sc_hdll__o21ba_1.spice
+++ b/cells/o21ba/sky130_fd_sc_hdll__o21ba_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21ba_1 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 a_79_199# a_222_93# VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_460_47# a_222_93# a_79_199# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=1.95e+11p ps=1.9e+06u
 .ends
-
diff --git a/cells/o21ba/sky130_fd_sc_hdll__o21ba_2.spice b/cells/o21ba/sky130_fd_sc_hdll__o21ba_2.spice
index 2a87f19..402198e 100644
--- a/cells/o21ba/sky130_fd_sc_hdll__o21ba_2.spice
+++ b/cells/o21ba/sky130_fd_sc_hdll__o21ba_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21ba_2 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 VPWR a_186_21# X VPB phighvt w=1e+06u l=180000u
@@ -26,4 +41,3 @@
 M1011 VGND B1_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/o21ba/sky130_fd_sc_hdll__o21ba_4.spice b/cells/o21ba/sky130_fd_sc_hdll__o21ba_4.spice
index 0ce4a99..e4a8254 100644
--- a/cells/o21ba/sky130_fd_sc_hdll__o21ba_4.spice
+++ b/cells/o21ba/sky130_fd_sc_hdll__o21ba_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21ba_4 A1 A2 B1_N VGND VNB VPB VPWR X
 M1000 VPWR a_197_21# X VPB phighvt w=1e+06u l=180000u
@@ -46,4 +61,3 @@
 M1021 VGND a_197_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21bai/sky130_fd_sc_hdll__o21bai_1.spice b/cells/o21bai/sky130_fd_sc_hdll__o21bai_1.spice
index 32eea06..634c6a2 100644
--- a/cells/o21bai/sky130_fd_sc_hdll__o21bai_1.spice
+++ b/cells/o21bai/sky130_fd_sc_hdll__o21bai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21bai_1 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_425_297# VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 Y a_105_352# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21bai/sky130_fd_sc_hdll__o21bai_2.spice b/cells/o21bai/sky130_fd_sc_hdll__o21bai_2.spice
index 529f11f..a40d8f7 100644
--- a/cells/o21bai/sky130_fd_sc_hdll__o21bai_2.spice
+++ b/cells/o21bai/sky130_fd_sc_hdll__o21bai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21bai_2 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_226_47# A1 VGND VNB nshort w=650000u l=150000u
@@ -30,4 +45,3 @@
 M1013 Y A2 a_437_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21bai/sky130_fd_sc_hdll__o21bai_4.spice b/cells/o21bai/sky130_fd_sc_hdll__o21bai_4.spice
index 5f7b4fa..3126953 100644
--- a/cells/o21bai/sky130_fd_sc_hdll__o21bai_4.spice
+++ b/cells/o21bai/sky130_fd_sc_hdll__o21bai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o21bai_4 A1 A2 B1_N VGND VNB VPB VPWR Y
 M1000 a_621_297# A1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -54,4 +69,3 @@
 M1025 a_621_297# A2 Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221a/sky130_fd_sc_hdll__o221a_1.spice b/cells/o221a/sky130_fd_sc_hdll__o221a_1.spice
index 685d624..3ca7053 100644
--- a/cells/o221a/sky130_fd_sc_hdll__o221a_1.spice
+++ b/cells/o221a/sky130_fd_sc_hdll__o221a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o221a_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 a_124_47# B2 a_230_47# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR C1 a_27_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221a/sky130_fd_sc_hdll__o221a_2.spice b/cells/o221a/sky130_fd_sc_hdll__o221a_2.spice
index de7e43f..04fae69 100644
--- a/cells/o221a/sky130_fd_sc_hdll__o221a_2.spice
+++ b/cells/o221a/sky130_fd_sc_hdll__o221a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o221a_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 a_255_297# B1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 X a_38_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221a/sky130_fd_sc_hdll__o221a_4.spice b/cells/o221a/sky130_fd_sc_hdll__o221a_4.spice
index 5937817..e4fbaef 100644
--- a/cells/o221a/sky130_fd_sc_hdll__o221a_4.spice
+++ b/cells/o221a/sky130_fd_sc_hdll__o221a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o221a_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR X
 M1000 a_307_47# A1 VGND VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_307_47# B1 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_hdll__o221ai_1.spice b/cells/o221ai/sky130_fd_sc_hdll__o221ai_1.spice
index 7a089af..6dcb608 100644
--- a/cells/o221ai/sky130_fd_sc_hdll__o221ai_1.spice
+++ b/cells/o221ai/sky130_fd_sc_hdll__o221ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o221ai_1 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 Y B2 a_351_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_351_297# B1 VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221ai/sky130_fd_sc_hdll__o221ai_2.spice b/cells/o221ai/sky130_fd_sc_hdll__o221ai_2.spice
index 635789e..8bd016f 100644
--- a/cells/o221ai/sky130_fd_sc_hdll__o221ai_2.spice
+++ b/cells/o221ai/sky130_fd_sc_hdll__o221ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o221ai_2 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 VPWR B1 a_410_297# VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 Y A2 a_802_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o221ai/sky130_fd_sc_hdll__o221ai_4.spice b/cells/o221ai/sky130_fd_sc_hdll__o221ai_4.spice
index 69ac54d..d838324 100644
--- a/cells/o221ai/sky130_fd_sc_hdll__o221ai_4.spice
+++ b/cells/o221ai/sky130_fd_sc_hdll__o221ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o221ai_4 A1 A2 B1 B2 C1 VGND VNB VPB VPWR Y
 M1000 Y C1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 a_27_47# B2 a_511_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hdll__o22a_1.spice b/cells/o22a/sky130_fd_sc_hdll__o22a_1.spice
index a1d15ed..115a14e 100644
--- a/cells/o22a/sky130_fd_sc_hdll__o22a_1.spice
+++ b/cells/o22a/sky130_fd_sc_hdll__o22a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o22a_1 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 VGND A2 a_219_47# VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_219_47# B2 a_83_21# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hdll__o22a_2.spice b/cells/o22a/sky130_fd_sc_hdll__o22a_2.spice
index b58344a..03b4dc6 100644
--- a/cells/o22a/sky130_fd_sc_hdll__o22a_2.spice
+++ b/cells/o22a/sky130_fd_sc_hdll__o22a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o22a_2 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_321_47# B2 a_83_21# VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_83_21# B1 a_321_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hdll__o22a_4.spice b/cells/o22a/sky130_fd_sc_hdll__o22a_4.spice
index b35a081..79a3b89 100644
--- a/cells/o22a/sky130_fd_sc_hdll__o22a_4.spice
+++ b/cells/o22a/sky130_fd_sc_hdll__o22a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o22a_4 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 VGND A1 a_524_47# VNB nshort w=650000u l=150000u
@@ -50,4 +65,3 @@
 M1023 VPWR B1 a_614_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hdll__o22ai_1.spice b/cells/o22ai/sky130_fd_sc_hdll__o22ai_1.spice
index a98feda..e07bcbc 100644
--- a/cells/o22ai/sky130_fd_sc_hdll__o22ai_1.spice
+++ b/cells/o22ai/sky130_fd_sc_hdll__o22ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o22ai_1 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_27_47# VNB nshort w=650000u l=150000u
@@ -18,4 +33,3 @@
 M1007 Y B2 a_117_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hdll__o22ai_2.spice b/cells/o22ai/sky130_fd_sc_hdll__o22ai_2.spice
index 57cda41..f9faef0 100644
--- a/cells/o22ai/sky130_fd_sc_hdll__o22ai_2.spice
+++ b/cells/o22ai/sky130_fd_sc_hdll__o22ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o22ai_2 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y A2 a_515_297# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 a_515_297# A2 Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hdll__o22ai_4.spice b/cells/o22ai/sky130_fd_sc_hdll__o22ai_4.spice
index 332481e..18a6783 100644
--- a/cells/o22ai/sky130_fd_sc_hdll__o22ai_4.spice
+++ b/cells/o22ai/sky130_fd_sc_hdll__o22ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o22ai_4 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 Y A2 a_123_297# VPB phighvt w=1e+06u l=180000u
@@ -66,4 +81,3 @@
 M1031 VGND A1 a_33_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_1.spice b/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_1.spice
index d00c081..6cf2e40 100644
--- a/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_1.spice
+++ b/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o2bb2a_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 VPWR A2_N a_224_369# VPB phighvt w=420000u l=180000u
@@ -26,4 +41,3 @@
 M1011 a_76_199# a_224_369# VPWR VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_2.spice b/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_2.spice
index 6bb7bab..0bb9679 100644
--- a/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_2.spice
+++ b/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o2bb2a_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 a_321_369# A2_N a_313_47# VNB nshort w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 X a_84_21# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_4.spice b/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_4.spice
index 524e394..051835a 100644
--- a/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_4.spice
+++ b/cells/o2bb2a/sky130_fd_sc_hdll__o2bb2a_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o2bb2a_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR X
 M1000 a_787_47# A1_N VGND VNB nshort w=650000u l=150000u
@@ -58,4 +73,3 @@
 M1027 VGND B2 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_hdll__o2bb2ai_1.spice b/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_1.spice
index 3de12be..171beb0 100644
--- a/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_1.spice
+++ b/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o2bb2ai_1 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_120_297# A1_N VPWR VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VGND B2 a_396_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_2.spice b/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_2.spice
index f24819e..29b469e 100644
--- a/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_2.spice
+++ b/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o2bb2ai_2 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 a_121_297# A1_N VPWR VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 VPWR B1 a_788_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_4.spice b/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_4.spice
index 59ed8e3..2fd6584 100644
--- a/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_4.spice
+++ b/cells/o2bb2ai/sky130_fd_sc_hdll__o2bb2ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o2bb2ai_4 A1_N A2_N B1 B2 VGND VNB VPB VPWR Y
 M1000 VGND B2 a_887_47# VNB nshort w=650000u l=150000u
@@ -82,4 +97,3 @@
 M1039 VPWR A1_N a_113_47# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31ai/sky130_fd_sc_hdll__o31ai_1.spice b/cells/o31ai/sky130_fd_sc_hdll__o31ai_1.spice
index 7555e54..57a3887 100644
--- a/cells/o31ai/sky130_fd_sc_hdll__o31ai_1.spice
+++ b/cells/o31ai/sky130_fd_sc_hdll__o31ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o31ai_1 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 a_117_297# A1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 VPWR B1 Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o31ai/sky130_fd_sc_hdll__o31ai_2.spice b/cells/o31ai/sky130_fd_sc_hdll__o31ai_2.spice
index 2c0f300..0b4359f 100644
--- a/cells/o31ai/sky130_fd_sc_hdll__o31ai_2.spice
+++ b/cells/o31ai/sky130_fd_sc_hdll__o31ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o31ai_2 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 a_27_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_hdll__o31ai_4.spice b/cells/o31ai/sky130_fd_sc_hdll__o31ai_4.spice
index d8b672e..834faf3 100644
--- a/cells/o31ai/sky130_fd_sc_hdll__o31ai_4.spice
+++ b/cells/o31ai/sky130_fd_sc_hdll__o31ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o31ai_4 A1 A2 A3 B1 VGND VNB VPB VPWR Y
 M1000 VGND A3 a_31_47# VNB nshort w=650000u l=150000u
@@ -66,4 +81,3 @@
 M1031 a_27_297# A2 a_497_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32ai/sky130_fd_sc_hdll__o32ai_1.spice b/cells/o32ai/sky130_fd_sc_hdll__o32ai_1.spice
index 28b362e..f03ca9e 100644
--- a/cells/o32ai/sky130_fd_sc_hdll__o32ai_1.spice
+++ b/cells/o32ai/sky130_fd_sc_hdll__o32ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o32ai_1 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 VPWR A1 a_465_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_338_297# A3 Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o32ai/sky130_fd_sc_hdll__o32ai_2.spice b/cells/o32ai/sky130_fd_sc_hdll__o32ai_2.spice
index f498deb..0c2dab2 100644
--- a/cells/o32ai/sky130_fd_sc_hdll__o32ai_2.spice
+++ b/cells/o32ai/sky130_fd_sc_hdll__o32ai_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o32ai_2 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_27_47# VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 Y B2 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_hdll__o32ai_4.spice b/cells/o32ai/sky130_fd_sc_hdll__o32ai_4.spice
index 84fb0ae..2229b82 100644
--- a/cells/o32ai/sky130_fd_sc_hdll__o32ai_4.spice
+++ b/cells/o32ai/sky130_fd_sc_hdll__o32ai_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__o32ai_4 A1 A2 A3 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_27_297# B1 VPWR VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 Y B1 a_27_47# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hdll__or2_1.spice b/cells/or2/sky130_fd_sc_hdll__or2_1.spice
index a63d18b..7e104af 100644
--- a/cells/or2/sky130_fd_sc_hdll__or2_1.spice
+++ b/cells/or2/sky130_fd_sc_hdll__or2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or2_1 A B VGND VNB VPB VPWR X
 M1000 VPWR A a_128_297# VPB phighvt w=420000u l=180000u
@@ -14,4 +29,3 @@
 M1005 X a_38_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=3.5e+11p pd=2.7e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hdll__or2_2.spice b/cells/or2/sky130_fd_sc_hdll__or2_2.spice
index a6a21df..ca2653c 100644
--- a/cells/or2/sky130_fd_sc_hdll__or2_2.spice
+++ b/cells/or2/sky130_fd_sc_hdll__or2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or2_2 A B VGND VNB VPB VPWR X
 M1000 VPWR A a_129_297# VPB phighvt w=420000u l=180000u
@@ -18,4 +33,3 @@
 M1007 VPWR a_39_297# X VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hdll__or2_4.spice b/cells/or2/sky130_fd_sc_hdll__or2_4.spice
index e2ae3a0..549f211 100644
--- a/cells/or2/sky130_fd_sc_hdll__or2_4.spice
+++ b/cells/or2/sky130_fd_sc_hdll__or2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or2_4 A B VGND VNB VPB VPWR X
 M1000 VGND a_35_297# X VNB nshort w=650000u l=150000u
@@ -26,4 +41,3 @@
 M1011 VPWR a_35_297# X VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hdll__or2_6.spice b/cells/or2/sky130_fd_sc_hdll__or2_6.spice
index 69ce575..53daa3f 100644
--- a/cells/or2/sky130_fd_sc_hdll__or2_6.spice
+++ b/cells/or2/sky130_fd_sc_hdll__or2_6.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__or2_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_hdll__or2_6 A B VGND VNB VPB VPWR X
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 X a_123_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hdll__or2_8.spice b/cells/or2/sky130_fd_sc_hdll__or2_8.spice
index 7887c88..7733fb1 100644
--- a/cells/or2/sky130_fd_sc_hdll__or2_8.spice
+++ b/cells/or2/sky130_fd_sc_hdll__or2_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__or2_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_hdll__or2_8 A B VGND VNB VPB VPWR X
 M1000 VPWR A a_27_297# VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 X a_123_47# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2b/sky130_fd_sc_hdll__or2b_1.spice b/cells/or2b/sky130_fd_sc_hdll__or2b_1.spice
index b87759d..51c07d2 100644
--- a/cells/or2b/sky130_fd_sc_hdll__or2b_1.spice
+++ b/cells/or2b/sky130_fd_sc_hdll__or2b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or2b_1 A B_N VGND VNB VPB VPWR X
 M1000 VGND B_N a_27_53# VNB nshort w=420000u l=150000u
@@ -18,4 +33,3 @@
 M1007 X a_229_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=2.8e+11p pd=2.56e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or2b/sky130_fd_sc_hdll__or2b_2.spice b/cells/or2b/sky130_fd_sc_hdll__or2b_2.spice
index 2a27ced..4754c00 100644
--- a/cells/or2b/sky130_fd_sc_hdll__or2b_2.spice
+++ b/cells/or2b/sky130_fd_sc_hdll__or2b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or2b_2 A B_N VGND VNB VPB VPWR X
 M1000 VGND B_N a_27_53# VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 VGND A a_228_297# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2b/sky130_fd_sc_hdll__or2b_4.spice b/cells/or2b/sky130_fd_sc_hdll__or2b_4.spice
index e26ae85..d3bdd3b 100644
--- a/cells/or2b/sky130_fd_sc_hdll__or2b_4.spice
+++ b/cells/or2b/sky130_fd_sc_hdll__or2b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or2b_4 A B_N VGND VNB VPB VPWR X
 M1000 VGND B_N a_27_53# VNB nshort w=420000u l=150000u
@@ -30,4 +45,3 @@
 M1013 VGND a_229_297# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3/sky130_fd_sc_hdll__or3_1.spice b/cells/or3/sky130_fd_sc_hdll__or3_1.spice
index 8a1c6d4..7a24f3f 100644
--- a/cells/or3/sky130_fd_sc_hdll__or3_1.spice
+++ b/cells/or3/sky130_fd_sc_hdll__or3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or3_1 A B C VGND VNB VPB VPWR X
 M1000 X a_29_53# VPWR VPB phighvt w=1e+06u l=180000u
@@ -18,4 +33,3 @@
 M1007 a_29_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_hdll__or3_2.spice b/cells/or3/sky130_fd_sc_hdll__or3_2.spice
index 4d71f9e..710f44b 100644
--- a/cells/or3/sky130_fd_sc_hdll__or3_2.spice
+++ b/cells/or3/sky130_fd_sc_hdll__or3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or3_2 A B C VGND VNB VPB VPWR X
 M1000 VGND a_30_53# X VNB nshort w=650000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_202_297# B a_120_297# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3/sky130_fd_sc_hdll__or3_4.spice b/cells/or3/sky130_fd_sc_hdll__or3_4.spice
index 28f6eb3..df64617 100644
--- a/cells/or3/sky130_fd_sc_hdll__or3_4.spice
+++ b/cells/or3/sky130_fd_sc_hdll__or3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or3_4 A B C VGND VNB VPB VPWR X
 M1000 a_211_297# B a_117_297# VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 X a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3b/sky130_fd_sc_hdll__or3b_1.spice b/cells/or3b/sky130_fd_sc_hdll__or3b_1.spice
index 86caa3f..74a3659 100644
--- a/cells/or3b/sky130_fd_sc_hdll__or3b_1.spice
+++ b/cells/or3b/sky130_fd_sc_hdll__or3b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or3b_1 A B C_N VGND VNB VPB VPWR X
 M1000 a_225_53# B VGND VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 X a_225_53# VGND VNB nshort w=650000u l=150000u
 +  ad=1.7875e+11p pd=1.85e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or3b/sky130_fd_sc_hdll__or3b_2.spice b/cells/or3b/sky130_fd_sc_hdll__or3b_2.spice
index 6a9ce70..62657ea 100644
--- a/cells/or3b/sky130_fd_sc_hdll__or3b_2.spice
+++ b/cells/or3b/sky130_fd_sc_hdll__or3b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or3b_2 A B C_N VGND VNB VPB VPWR X
 M1000 a_448_297# A VPWR VPB phighvt w=420000u l=180000u
@@ -26,4 +41,3 @@
 M1011 VGND a_186_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3b/sky130_fd_sc_hdll__or3b_4.spice b/cells/or3b/sky130_fd_sc_hdll__or3b_4.spice
index 2b64012..6d71f0e 100644
--- a/cells/or3b/sky130_fd_sc_hdll__or3b_4.spice
+++ b/cells/or3b/sky130_fd_sc_hdll__or3b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or3b_4 A B C_N VGND VNB VPB VPWR X
 M1000 VPWR a_186_21# X VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 a_600_297# A VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4/sky130_fd_sc_hdll__or4_1.spice b/cells/or4/sky130_fd_sc_hdll__or4_1.spice
index 68e72a9..cd5dec1 100644
--- a/cells/or4/sky130_fd_sc_hdll__or4_1.spice
+++ b/cells/or4/sky130_fd_sc_hdll__or4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4_1 A B C D VGND VNB VPB VPWR X
 M1000 a_27_297# D VGND VNB nshort w=420000u l=150000u
@@ -22,4 +37,3 @@
 M1009 a_223_297# C a_117_297# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4/sky130_fd_sc_hdll__or4_2.spice b/cells/or4/sky130_fd_sc_hdll__or4_2.spice
index 39ca240..a5a31d6 100644
--- a/cells/or4/sky130_fd_sc_hdll__or4_2.spice
+++ b/cells/or4/sky130_fd_sc_hdll__or4_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4_2 A B C D VGND VNB VPB VPWR X
 M1000 a_27_297# D VGND VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 a_305_297# B a_223_297# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4/sky130_fd_sc_hdll__or4_4.spice b/cells/or4/sky130_fd_sc_hdll__or4_4.spice
index 7084fe1..a410f1e 100644
--- a/cells/or4/sky130_fd_sc_hdll__or4_4.spice
+++ b/cells/or4/sky130_fd_sc_hdll__or4_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4_4 A B C D VGND VNB VPB VPWR X
 M1000 X a_32_297# VPWR VPB phighvt w=1e+06u l=180000u
@@ -34,4 +49,3 @@
 M1015 VPWR a_32_297# X VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4b/sky130_fd_sc_hdll__or4b_1.spice b/cells/or4b/sky130_fd_sc_hdll__or4b_1.spice
index d614f50..812f92b 100644
--- a/cells/or4b/sky130_fd_sc_hdll__or4b_1.spice
+++ b/cells/or4b/sky130_fd_sc_hdll__or4b_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4b_1 A B C D_N VGND VNB VPB VPWR X
 M1000 a_117_297# D_N VGND VNB nshort w=420000u l=150000u
@@ -26,4 +41,3 @@
 M1011 X a_225_297# VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=2.85e+11p pd=2.57e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/or4b/sky130_fd_sc_hdll__or4b_2.spice b/cells/or4b/sky130_fd_sc_hdll__or4b_2.spice
index bdb11af..f830c8c 100644
--- a/cells/or4b/sky130_fd_sc_hdll__or4b_2.spice
+++ b/cells/or4b/sky130_fd_sc_hdll__or4b_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4b_2 A B C D_N VGND VNB VPB VPWR X
 M1000 a_425_297# A VPWR VPB phighvt w=420000u l=180000u
@@ -30,4 +45,3 @@
 M1013 VGND a_186_21# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4b/sky130_fd_sc_hdll__or4b_4.spice b/cells/or4b/sky130_fd_sc_hdll__or4b_4.spice
index 05e8cb4..989393c 100644
--- a/cells/or4b/sky130_fd_sc_hdll__or4b_4.spice
+++ b/cells/or4b/sky130_fd_sc_hdll__or4b_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4b_4 A B C D_N VGND VNB VPB VPWR X
 M1000 VPWR a_225_297# X VPB phighvt w=1e+06u l=180000u
@@ -38,4 +53,3 @@
 M1017 a_315_297# a_117_413# a_225_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=2.7e+11p ps=2.54e+06u
 .ends
-
diff --git a/cells/or4bb/sky130_fd_sc_hdll__or4bb_1.spice b/cells/or4bb/sky130_fd_sc_hdll__or4bb_1.spice
index d74288e..7afdca1 100644
--- a/cells/or4bb/sky130_fd_sc_hdll__or4bb_1.spice
+++ b/cells/or4bb/sky130_fd_sc_hdll__or4bb_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4bb_1 A B C_N D_N VGND VNB VPB VPWR X
 M1000 X a_331_413# VPWR VPB phighvt w=1e+06u l=180000u
@@ -30,4 +45,3 @@
 M1013 a_527_297# a_27_410# a_421_413# VPB phighvt w=420000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4bb/sky130_fd_sc_hdll__or4bb_2.spice b/cells/or4bb/sky130_fd_sc_hdll__or4bb_2.spice
index a76ded2..0188f1c 100644
--- a/cells/or4bb/sky130_fd_sc_hdll__or4bb_2.spice
+++ b/cells/or4bb/sky130_fd_sc_hdll__or4bb_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4bb_2 A B C_N D_N VGND VNB VPB VPWR X
 M1000 VPWR A a_614_297# VPB phighvt w=420000u l=180000u
@@ -34,4 +49,3 @@
 M1015 VGND a_27_410# a_336_413# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or4bb/sky130_fd_sc_hdll__or4bb_4.spice b/cells/or4bb/sky130_fd_sc_hdll__or4bb_4.spice
index 5d1a82f..cac7d2e 100644
--- a/cells/or4bb/sky130_fd_sc_hdll__or4bb_4.spice
+++ b/cells/or4bb/sky130_fd_sc_hdll__or4bb_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__or4bb_4 A B C_N D_N VGND VNB VPB VPWR X
 M1000 X a_335_297# VPWR VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 VGND a_335_297# X VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/probe_p/sky130_fd_sc_hdll__probe_p_8.spice b/cells/probe_p/sky130_fd_sc_hdll__probe_p_8.spice
index fefc36c..965db05 100644
--- a/cells/probe_p/sky130_fd_sc_hdll__probe_p_8.spice
+++ b/cells/probe_p/sky130_fd_sc_hdll__probe_p_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__probe_p_8 A VGND VNB VPB VPWR X
 M1000 a_399_297# a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -47,4 +62,3 @@
 M1021 VGND a_27_47# a_399_297# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/probec_p/sky130_fd_sc_hdll__probec_p_8.spice b/cells/probec_p/sky130_fd_sc_hdll__probec_p_8.spice
index 3120b9d..8caf558 100644
--- a/cells/probec_p/sky130_fd_sc_hdll__probec_p_8.spice
+++ b/cells/probec_p/sky130_fd_sc_hdll__probec_p_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__probec_p_8 A VGND VNB VPB VPWR X
 M1000 a_399_297# a_27_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -49,4 +64,3 @@
 M1021 VGND a_27_47# a_399_297# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfbbp/sky130_fd_sc_hdll__sdfbbp_1.spice b/cells/sdfbbp/sky130_fd_sc_hdll__sdfbbp_1.spice
index 84c57e5..079ecc6 100644
--- a/cells/sdfbbp/sky130_fd_sc_hdll__sdfbbp_1.spice
+++ b/cells/sdfbbp/sky130_fd_sc_hdll__sdfbbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfbbp_1 CLK D RESET_B SCD SCE SET_B VGND VNB VPB VPWR
 + Q Q_N
@@ -99,4 +114,3 @@
 M1047 Q a_2845_47# VGND VNB nshort w=650000u l=150000u
 +  ad=1.69e+11p pd=1.82e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_1.spice b/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_1.spice
index 111ca53..53b8275 100644
--- a/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_1.spice
+++ b/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfrbp_1 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1428_47# a_1380_303# a_1322_47# VNB nshort w=420000u l=150000u
@@ -82,4 +97,3 @@
 M1039 a_1380_303# a_1202_413# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_2.spice b/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_2.spice
index 38c5e0b..f620ce6 100644
--- a/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_2.spice
+++ b/cells/sdfrbp/sky130_fd_sc_hdll__sdfrbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfrbp_2 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1428_47# a_1380_303# a_1322_47# VNB nshort w=420000u l=150000u
@@ -90,4 +105,3 @@
 M1043 a_1380_303# a_1202_413# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtn/sky130_fd_sc_hdll__sdfrtn_1.spice b/cells/sdfrtn/sky130_fd_sc_hdll__sdfrtn_1.spice
index ef87c80..5da1c39 100644
--- a/cells/sdfrtn/sky130_fd_sc_hdll__sdfrtn_1.spice
+++ b/cells/sdfrtn/sky130_fd_sc_hdll__sdfrtn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfrtn_1 CLK_N D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1428_47# a_1380_303# a_1322_47# VNB nshort w=420000u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_1380_303# a_1202_413# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_1.spice b/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_1.spice
index 608827e..a276bb6 100644
--- a/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_1.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfrtp_1 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1428_47# a_1380_303# a_1322_47# VNB nshort w=420000u l=150000u
@@ -74,4 +89,3 @@
 M1035 a_1380_303# a_1202_413# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_2.spice b/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_2.spice
index a4c35ea..735b202 100644
--- a/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_2.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfrtp_2 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1428_47# a_1380_303# a_1322_47# VNB nshort w=420000u l=150000u
@@ -78,4 +93,3 @@
 M1037 a_1380_303# a_1202_413# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_4.spice b/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_4.spice
index 79eb0cd..8dc8126 100644
--- a/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_4.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hdll__sdfrtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfrtp_4 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1428_47# a_1380_303# a_1322_47# VNB nshort w=420000u l=150000u
@@ -86,4 +101,3 @@
 M1041 a_1380_303# a_1202_413# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_1.spice b/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_1.spice
index 9e0c47e..7437bc7 100644
--- a/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_1.spice
+++ b/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfsbp_1 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q Q_N
 M1000 VGND a_349_21# a_295_47# VNB nshort w=420000u l=150000u
@@ -86,4 +101,3 @@
 M1041 a_1977_47# a_693_369# a_1735_329# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_2.spice b/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_2.spice
index d1defa9..8897c49 100644
--- a/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_2.spice
+++ b/cells/sdfsbp/sky130_fd_sc_hdll__sdfsbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfsbp_2 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q Q_N
 M1000 VGND a_349_21# a_295_47# VNB nshort w=420000u l=150000u
@@ -94,4 +109,3 @@
 M1045 a_1977_47# a_693_369# a_1735_329# VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_1.spice b/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_1.spice
index 9ed8c98..6400210 100644
--- a/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_1.spice
+++ b/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfstp_1 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VPWR SET_B a_1229_21# VPB phighvt w=420000u l=180000u
@@ -82,4 +97,3 @@
 M1039 VPWR CLK a_693_369# VPB phighvt w=640000u l=180000u
 +  ad=0p pd=0u as=1.728e+11p ps=1.82e+06u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_2.spice b/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_2.spice
index 0e473e9..fef5f02 100644
--- a/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_2.spice
+++ b/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfstp_2 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VPWR SET_B a_1229_21# VPB phighvt w=420000u l=180000u
@@ -86,4 +101,3 @@
 M1041 a_1745_329# a_877_369# a_1654_47# VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_4.spice b/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_4.spice
index 895743f..cf9a9bb 100644
--- a/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_4.spice
+++ b/cells/sdfstp/sky130_fd_sc_hdll__sdfstp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfstp_4 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VPWR SET_B a_1229_21# VPB phighvt w=420000u l=180000u
@@ -94,4 +109,3 @@
 M1045 a_1745_329# a_877_369# a_1654_47# VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_1.spice b/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_1.spice
index d82372b..f08ba6f 100644
--- a/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_1.spice
+++ b/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfxbp_1 CLK D SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 VPWR a_1179_183# a_1111_413# VPB phighvt w=420000u l=180000u
@@ -74,4 +89,3 @@
 M1035 VGND a_1464_413# a_1653_315# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=2.015e+11p ps=1.92e+06u
 .ends
-
diff --git a/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_2.spice b/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_2.spice
index b60c27b..59d566c 100644
--- a/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_2.spice
+++ b/cells/sdfxbp/sky130_fd_sc_hdll__sdfxbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfxbp_2 CLK D SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 VPWR a_1179_183# a_1111_413# VPB phighvt w=420000u l=180000u
@@ -82,4 +97,3 @@
 M1039 VGND a_1464_413# a_1653_315# VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=2.015e+11p ps=1.92e+06u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_1.spice b/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_1.spice
index 47f3e3c..45fbb83 100644
--- a/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_1.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfxtp_1 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 VPWR a_1189_21# a_1121_413# VPB phighvt w=420000u l=180000u
@@ -66,4 +81,3 @@
 M1031 Q a_1647_21# VGND VNB nshort w=650000u l=150000u
 +  ad=2.015e+11p pd=1.92e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_2.spice b/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_2.spice
index f76e2fe..c5fe7a4 100644
--- a/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_2.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfxtp_2 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 VPWR a_1189_183# a_1121_413# VPB phighvt w=420000u l=180000u
@@ -70,4 +85,3 @@
 M1033 a_608_369# D a_504_369# VPB phighvt w=640000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_4.spice b/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_4.spice
index 6679ad2..ddd0437 100644
--- a/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_4.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hdll__sdfxtp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdfxtp_4 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 VPWR a_1189_183# a_1121_413# VPB phighvt w=420000u l=180000u
@@ -78,4 +93,3 @@
 M1037 a_608_369# D a_504_369# VPB phighvt w=640000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_1.spice b/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_1.spice
index 96278b7..0dbe563 100644
--- a/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_1.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdlclkp_1 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_484_315# a_299_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -46,4 +61,3 @@
 M1021 a_27_47# GATE VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_2.spice b/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_2.spice
index 9ffd25f..621878f 100644
--- a/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_2.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdlclkp_2 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_484_315# a_299_47# VPWR VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 a_27_47# GATE VGND VNB nshort w=420000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_4.spice b/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_4.spice
index e6ef12e..00f6bc1 100644
--- a/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_4.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hdll__sdlclkp_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sdlclkp_4 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_425_47# a_277_243# a_310_47# VNB nshort w=360000u l=150000u
@@ -58,4 +73,3 @@
 M1027 a_505_315# a_310_47# VGND VNB nshort w=650000u l=150000u
 +  ad=1.69e+11p pd=1.82e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_1.spice b/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_1.spice
index 78762a5..f0df6cf 100644
--- a/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_1.spice
+++ b/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sedfxbp_1 CLK D DE SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1787_159# a_1611_413# VPWR VPB phighvt w=750000u l=180000u
@@ -90,4 +105,3 @@
 M1043 a_1787_159# a_1611_413# VGND VNB nshort w=640000u l=150000u
 +  ad=1.664e+11p pd=1.8e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_2.spice b/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_2.spice
index 848058d..0a5b22f 100644
--- a/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_2.spice
+++ b/cells/sedfxbp/sky130_fd_sc_hdll__sedfxbp_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__sedfxbp_2 CLK D DE SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1787_159# a_1611_413# VPWR VPB phighvt w=750000u l=180000u
@@ -98,4 +113,3 @@
 M1047 a_1787_159# a_1611_413# VGND VNB nshort w=640000u l=150000u
 +  ad=1.664e+11p pd=1.8e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/tap/sky130_fd_sc_hdll__tap_1.spice b/cells/tap/sky130_fd_sc_hdll__tap_1.spice
index 94f7948..b8a03ca 100644
--- a/cells/tap/sky130_fd_sc_hdll__tap_1.spice
+++ b/cells/tap/sky130_fd_sc_hdll__tap_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__tap_1 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.spice b/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.spice
index a0b4f7b..55bd162 100644
--- a/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.spice
+++ b/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__tapvgnd_1 VGND VPB VPWR
 .ends
-
diff --git a/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.spice b/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.spice
index f85bb45..816b250 100644
--- a/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.spice
+++ b/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__tapvgnd2_1 VGND VPB VPWR
 .ends
-
diff --git a/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.spice b/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.spice
index 846e7f2..feb01e9 100644
--- a/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.spice
+++ b/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__tapvpwrvgnd_1 VGND VPWR
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hdll__xnor2_1.spice b/cells/xnor2/sky130_fd_sc_hdll__xnor2_1.spice
index 8c23deb..6139d34 100644
--- a/cells/xnor2/sky130_fd_sc_hdll__xnor2_1.spice
+++ b/cells/xnor2/sky130_fd_sc_hdll__xnor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xnor2_1 A B VGND VNB VPB VPWR Y
 M1000 Y B a_415_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 VPWR a_47_47# Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hdll__xnor2_2.spice b/cells/xnor2/sky130_fd_sc_hdll__xnor2_2.spice
index d267de0..3e9d277 100644
--- a/cells/xnor2/sky130_fd_sc_hdll__xnor2_2.spice
+++ b/cells/xnor2/sky130_fd_sc_hdll__xnor2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xnor2_2 A B VGND VNB VPB VPWR Y
 M1000 a_514_297# A VPWR VPB phighvt w=1e+06u l=180000u
@@ -42,4 +57,3 @@
 M1019 a_514_297# B Y VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hdll__xnor2_4.spice b/cells/xnor2/sky130_fd_sc_hdll__xnor2_4.spice
index a303c81..7df63ae 100644
--- a/cells/xnor2/sky130_fd_sc_hdll__xnor2_4.spice
+++ b/cells/xnor2/sky130_fd_sc_hdll__xnor2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xnor2_4 A B VGND VNB VPB VPWR Y
 M1000 VPWR A a_898_297# VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 a_980_47# B VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor3/sky130_fd_sc_hdll__xnor3_1.spice b/cells/xnor3/sky130_fd_sc_hdll__xnor3_1.spice
index 2bd7528..3506ac3 100644
--- a/cells/xnor3/sky130_fd_sc_hdll__xnor3_1.spice
+++ b/cells/xnor3/sky130_fd_sc_hdll__xnor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xnor3_1 A B C VGND VNB VPB VPWR X
 M1000 VPWR a_83_21# X VPB phighvt w=1e+06u l=180000u
@@ -46,4 +61,3 @@
 M1021 a_375_49# a_226_93# a_83_21# VPB phighvt w=840000u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor3/sky130_fd_sc_hdll__xnor3_2.spice b/cells/xnor3/sky130_fd_sc_hdll__xnor3_2.spice
index 3c13978..587ac12 100644
--- a/cells/xnor3/sky130_fd_sc_hdll__xnor3_2.spice
+++ b/cells/xnor3/sky130_fd_sc_hdll__xnor3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xnor3_2 A B C VGND VNB VPB VPWR X
 M1000 a_477_49# a_328_93# a_79_21# VPB phighvt w=840000u l=180000u
@@ -50,4 +65,3 @@
 M1023 X a_79_21# VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor3/sky130_fd_sc_hdll__xnor3_4.spice b/cells/xnor3/sky130_fd_sc_hdll__xnor3_4.spice
index 806a8a5..ae687e2 100644
--- a/cells/xnor3/sky130_fd_sc_hdll__xnor3_4.spice
+++ b/cells/xnor3/sky130_fd_sc_hdll__xnor3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xnor3_4 A B C VGND VNB VPB VPWR X
 M1000 X a_101_21# VPWR VPB phighvt w=1e+06u l=180000u
@@ -58,4 +73,3 @@
 M1027 a_1089_297# B VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=3.2e+11p pd=2.64e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hdll__xor2_1.spice b/cells/xor2/sky130_fd_sc_hdll__xor2_1.spice
index 9a7e61a..ecba694 100644
--- a/cells/xor2/sky130_fd_sc_hdll__xor2_1.spice
+++ b/cells/xor2/sky130_fd_sc_hdll__xor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xor2_1 A B VGND VNB VPB VPWR X
 M1000 VPWR A a_125_297# VPB phighvt w=1e+06u l=180000u
@@ -22,4 +37,3 @@
 M1009 a_315_297# A VPWR VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hdll__xor2_2.spice b/cells/xor2/sky130_fd_sc_hdll__xor2_2.spice
index 79e0e10..8fdd987 100644
--- a/cells/xor2/sky130_fd_sc_hdll__xor2_2.spice
+++ b/cells/xor2/sky130_fd_sc_hdll__xor2_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xor2_2 A B VGND VNB VPB VPWR X
 M1000 X B a_510_47# VNB nshort w=650000u l=150000u
@@ -42,4 +57,3 @@
 M1019 VPWR A a_510_297# VPB phighvt w=1e+06u l=180000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hdll__xor2_4.spice b/cells/xor2/sky130_fd_sc_hdll__xor2_4.spice
index c78c0a5..2f64fbc 100644
--- a/cells/xor2/sky130_fd_sc_hdll__xor2_4.spice
+++ b/cells/xor2/sky130_fd_sc_hdll__xor2_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xor2_4 A B VGND VNB VPB VPWR X
 M1000 a_27_297# B a_112_47# VPB phighvt w=1e+06u l=180000u
@@ -82,4 +97,3 @@
 M1039 a_112_47# B VGND VNB nshort w=650000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor3/sky130_fd_sc_hdll__xor3_1.spice b/cells/xor3/sky130_fd_sc_hdll__xor3_1.spice
index a539d75..61ef41a 100644
--- a/cells/xor3/sky130_fd_sc_hdll__xor3_1.spice
+++ b/cells/xor3/sky130_fd_sc_hdll__xor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xor3_1 A B C VGND VNB VPB VPWR X
 M1000 VGND A a_991_365# VNB nshort w=640000u l=150000u
@@ -46,4 +61,3 @@
 M1021 a_1276_297# a_991_365# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor3/sky130_fd_sc_hdll__xor3_2.spice b/cells/xor3/sky130_fd_sc_hdll__xor3_2.spice
index d263935..15646f9 100644
--- a/cells/xor3/sky130_fd_sc_hdll__xor3_2.spice
+++ b/cells/xor3/sky130_fd_sc_hdll__xor3_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xor3_2 A B C VGND VNB VPB VPWR X
 M1000 VPWR A a_1050_365# VPB phighvt w=1e+06u l=180000u
@@ -50,4 +65,3 @@
 M1023 a_1335_297# a_1050_365# VGND VNB nshort w=640000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor3/sky130_fd_sc_hdll__xor3_4.spice b/cells/xor3/sky130_fd_sc_hdll__xor3_4.spice
index fbb4467..5537d7c 100644
--- a/cells/xor3/sky130_fd_sc_hdll__xor3_4.spice
+++ b/cells/xor3/sky130_fd_sc_hdll__xor3_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hdll__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_hdll__xor3_4 A B C VGND VNB VPB VPWR X
 M1000 VPWR a_80_207# X VPB phighvt w=1e+06u l=180000u
@@ -58,4 +73,3 @@
 M1027 a_1225_365# a_1109_297# a_652_325# VNB nshort w=600000u l=150000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-