diff --git a/cells/a21o/sky130_fd_sc_hvl__a21o_1.spice b/cells/a21o/sky130_fd_sc_hvl__a21o_1.spice
index 5fcc716..334e0b8 100644
--- a/cells/a21o/sky130_fd_sc_hvl__a21o_1.spice
+++ b/cells/a21o/sky130_fd_sc_hvl__a21o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__a21o_1 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 a_83_283# B1 VGND VNB nhv w=750000u l=500000u
@@ -18,4 +33,3 @@
 M1007 VGND A2 a_631_107# VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a21oi/sky130_fd_sc_hvl__a21oi_1.spice b/cells/a21oi/sky130_fd_sc_hvl__a21oi_1.spice
index 3419958..e490c5a 100644
--- a/cells/a21oi/sky130_fd_sc_hvl__a21oi_1.spice
+++ b/cells/a21oi/sky130_fd_sc_hvl__a21oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__a21oi_1 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_271_107# A2 VGND VNB nhv w=750000u l=500000u
@@ -14,4 +29,3 @@
 M1005 a_56_443# A1 VPWR VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/a22o/sky130_fd_sc_hvl__a22o_1.spice b/cells/a22o/sky130_fd_sc_hvl__a22o_1.spice
index 09a6d58..d2d9426 100644
--- a/cells/a22o/sky130_fd_sc_hvl__a22o_1.spice
+++ b/cells/a22o/sky130_fd_sc_hvl__a22o_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__a22o_1 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_83_81# B2 a_316_443# VPB phv w=1.5e+06u l=500000u
@@ -22,4 +37,3 @@
 M1009 VPWR a_83_81# X VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=4.275e+11p ps=3.57e+06u
 .ends
-
diff --git a/cells/a22oi/sky130_fd_sc_hvl__a22oi_1.spice b/cells/a22oi/sky130_fd_sc_hvl__a22oi_1.spice
index 03a7302..93a6da7 100644
--- a/cells/a22oi/sky130_fd_sc_hvl__a22oi_1.spice
+++ b/cells/a22oi/sky130_fd_sc_hvl__a22oi_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__a22oi_1 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 a_33_443# A2 VPWR VPB phv w=1.5e+06u l=500000u
@@ -18,4 +33,3 @@
 M1007 a_33_443# B1 Y VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/and2/sky130_fd_sc_hvl__and2_1.spice b/cells/and2/sky130_fd_sc_hvl__and2_1.spice
index 668b3be..299ab60 100644
--- a/cells/and2/sky130_fd_sc_hvl__and2_1.spice
+++ b/cells/and2/sky130_fd_sc_hvl__and2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__and2_1 A B VGND VNB VPB VPWR X
 M1000 X a_30_107# VPWR VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 a_183_107# A a_30_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=1.113e+11p ps=1.37e+06u
 .ends
-
diff --git a/cells/and3/sky130_fd_sc_hvl__and3_1.spice b/cells/and3/sky130_fd_sc_hvl__and3_1.spice
index c47275e..39248ac 100644
--- a/cells/and3/sky130_fd_sc_hvl__and3_1.spice
+++ b/cells/and3/sky130_fd_sc_hvl__and3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__and3_1 A B C VGND VNB VPB VPWR X
 M1000 a_30_517# B VPWR VPB phv w=420000u l=500000u
@@ -18,4 +33,3 @@
 M1007 VPWR A a_30_517# VPB phv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hvl__buf_1.spice b/cells/buf/sky130_fd_sc_hvl__buf_1.spice
index 9130e39..53d52c7 100644
--- a/cells/buf/sky130_fd_sc_hvl__buf_1.spice
+++ b/cells/buf/sky130_fd_sc_hvl__buf_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__buf_1 A VGND VNB VPB VPWR X
 M1000 VPWR a_84_81# X VPB phv w=1.5e+06u l=500000u
@@ -10,4 +25,3 @@
 M1003 a_84_81# A VPWR VPB phv w=750000u l=500000u
 +  ad=2.1375e+11p pd=2.07e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hvl__buf_16.spice b/cells/buf/sky130_fd_sc_hvl__buf_16.spice
index 4c00c56..bcfecf7 100644
--- a/cells/buf/sky130_fd_sc_hvl__buf_16.spice
+++ b/cells/buf/sky130_fd_sc_hvl__buf_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__buf_16 A VGND VNB VPB VPWR X
 M1000 VPWR A a_183_141# VPB phv w=1.5e+06u l=500000u
@@ -90,4 +105,3 @@
 M1043 VGND A a_183_141# VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hvl__buf_2.spice b/cells/buf/sky130_fd_sc_hvl__buf_2.spice
index 4a61a39..0219c70 100644
--- a/cells/buf/sky130_fd_sc_hvl__buf_2.spice
+++ b/cells/buf/sky130_fd_sc_hvl__buf_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__buf_2 A VGND VNB VPB VPWR X
 M1000 a_129_279# A VPWR VPB phv w=750000u l=500000u
@@ -14,4 +29,3 @@
 M1005 VGND a_129_279# X VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hvl__buf_32.spice b/cells/buf/sky130_fd_sc_hvl__buf_32.spice
index fa33839..a79c3e3 100644
--- a/cells/buf/sky130_fd_sc_hvl__buf_32.spice
+++ b/cells/buf/sky130_fd_sc_hvl__buf_32.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__buf_32.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__buf_32 A VGND VNB VPB VPWR X
 M1000 VPWR A a_183_141# VPB phv w=1.5e+06u l=500000u
@@ -170,4 +185,3 @@
 M1083 X a_183_141# VGND VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hvl__buf_4.spice b/cells/buf/sky130_fd_sc_hvl__buf_4.spice
index 0d6d5a3..9828477 100644
--- a/cells/buf/sky130_fd_sc_hvl__buf_4.spice
+++ b/cells/buf/sky130_fd_sc_hvl__buf_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__buf_4 A VGND VNB VPB VPWR X
 M1000 VGND a_149_81# X VNB nhv w=750000u l=500000u
@@ -22,4 +37,3 @@
 M1009 X a_149_81# VPWR VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/buf/sky130_fd_sc_hvl__buf_8.spice b/cells/buf/sky130_fd_sc_hvl__buf_8.spice
index 073d45d..b46e09c 100644
--- a/cells/buf/sky130_fd_sc_hvl__buf_8.spice
+++ b/cells/buf/sky130_fd_sc_hvl__buf_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__buf_8 A VGND VNB VPB VPWR X
 M1000 X a_45_443# VPWR VPB phv w=1.5e+06u l=500000u
@@ -46,4 +61,3 @@
 M1021 X a_45_443# VGND VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/conb/sky130_fd_sc_hvl__conb_1.spice b/cells/conb/sky130_fd_sc_hvl__conb_1.spice
index 0189022..7cbfcd5 100644
--- a/cells/conb/sky130_fd_sc_hvl__conb_1.spice
+++ b/cells/conb/sky130_fd_sc_hvl__conb_1.spice
@@ -1,7 +1,21 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__conb_1 VGND VNB VPB VPWR HI LO
 R0 HI VPWR short w=510000u l=45000u
 R1 VGND LO short w=510000u l=45000u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hvl__decap_4.spice b/cells/decap/sky130_fd_sc_hvl__decap_4.spice
index 292529d..03b34fa 100644
--- a/cells/decap/sky130_fd_sc_hvl__decap_4.spice
+++ b/cells/decap/sky130_fd_sc_hvl__decap_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__decap_4 VGND VNB VPB VPWR
 M1000 VGND VPWR VGND VNB nhv w=750000u l=1e+06u
@@ -6,4 +21,3 @@
 M1001 VPWR VGND VPWR VPB phv w=1e+06u l=1e+06u
 +  ad=5.5e+11p pd=5.1e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/decap/sky130_fd_sc_hvl__decap_8.spice b/cells/decap/sky130_fd_sc_hvl__decap_8.spice
index c7364ae..30ac5a4 100644
--- a/cells/decap/sky130_fd_sc_hvl__decap_8.spice
+++ b/cells/decap/sky130_fd_sc_hvl__decap_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__decap_8 VGND VNB VPB VPWR
 M1000 VPWR VGND VPWR VPB phv w=1e+06u l=1e+06u
@@ -10,4 +25,3 @@
 M1003 VGND VPWR VGND VNB nhv w=750000u l=1e+06u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfrbp/sky130_fd_sc_hvl__dfrbp_1.spice b/cells/dfrbp/sky130_fd_sc_hvl__dfrbp_1.spice
index 17fc40f..cc21f4d 100644
--- a/cells/dfrbp/sky130_fd_sc_hvl__dfrbp_1.spice
+++ b/cells/dfrbp/sky130_fd_sc_hvl__dfrbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__dfrbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__dfrbp_1 CLK D RESET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_2412_107# RESET_B VGND VNB nhv w=420000u l=500000u
@@ -70,4 +85,3 @@
 M1033 VPWR a_1900_107# a_2937_443# VPB phv w=750000u l=500000u
 +  ad=0p pd=0u as=2.1375e+11p ps=2.07e+06u
 .ends
-
diff --git a/cells/dfrtp/sky130_fd_sc_hvl__dfrtp_1.spice b/cells/dfrtp/sky130_fd_sc_hvl__dfrtp_1.spice
index 34f2cdf..d0c49df 100644
--- a/cells/dfrtp/sky130_fd_sc_hvl__dfrtp_1.spice
+++ b/cells/dfrtp/sky130_fd_sc_hvl__dfrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__dfrtp_1 CLK D RESET_B VGND VNB VPB VPWR Q
 M1000 a_339_537# a_30_107# VPWR VPB phv w=750000u l=500000u
@@ -66,4 +81,3 @@
 M1031 VGND a_2096_417# a_2089_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfsbp/sky130_fd_sc_hvl__dfsbp_1.spice b/cells/dfsbp/sky130_fd_sc_hvl__dfsbp_1.spice
index 6d72126..893464d 100644
--- a/cells/dfsbp/sky130_fd_sc_hvl__dfsbp_1.spice
+++ b/cells/dfsbp/sky130_fd_sc_hvl__dfsbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__dfsbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__dfsbp_1 CLK D SET_B VGND VNB VPB VPWR Q Q_N
 M1000 a_1874_543# a_30_112# a_1732_543# VPB phv w=1e+06u l=500000u
@@ -70,4 +85,3 @@
 M1033 a_1732_543# a_761_109# VPWR VPB phv w=1e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfstp/sky130_fd_sc_hvl__dfstp_1.spice b/cells/dfstp/sky130_fd_sc_hvl__dfstp_1.spice
index 5ff63fa..feac2dc 100644
--- a/cells/dfstp/sky130_fd_sc_hvl__dfstp_1.spice
+++ b/cells/dfstp/sky130_fd_sc_hvl__dfstp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__dfstp_1 CLK D SET_B VGND VNB VPB VPWR Q
 M1000 VPWR a_1000_81# a_982_529# VPB phv w=420000u l=500000u
@@ -66,4 +81,3 @@
 M1031 VPWR a_2031_177# a_1989_515# VPB phv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxbp/sky130_fd_sc_hvl__dfxbp_1.spice b/cells/dfxbp/sky130_fd_sc_hvl__dfxbp_1.spice
index 03cdc7b..fcd6e70 100644
--- a/cells/dfxbp/sky130_fd_sc_hvl__dfxbp_1.spice
+++ b/cells/dfxbp/sky130_fd_sc_hvl__dfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__dfxbp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__dfxbp_1 CLK D VGND VNB VPB VPWR Q Q_N
 M1000 a_1494_539# a_30_112# a_1063_85# VPB phv w=1e+06u l=500000u
@@ -58,4 +73,3 @@
 M1027 Q_N a_2365_443# VGND VNB nhv w=750000u l=500000u
 +  ad=1.9875e+11p pd=2.03e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/dfxtp/sky130_fd_sc_hvl__dfxtp_1.spice b/cells/dfxtp/sky130_fd_sc_hvl__dfxtp_1.spice
index 14e125c..2663042 100644
--- a/cells/dfxtp/sky130_fd_sc_hvl__dfxtp_1.spice
+++ b/cells/dfxtp/sky130_fd_sc_hvl__dfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__dfxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__dfxtp_1 CLK D VGND VNB VPB VPWR Q
 M1000 a_982_543# a_30_127# a_780_574# VPB phv w=420000u l=500000u
@@ -50,4 +65,3 @@
 M1023 Q a_1729_87# VGND VNB nhv w=750000u l=500000u
 +  ad=1.9875e+11p pd=2.03e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/diode/sky130_fd_sc_hvl__diode_2.spice b/cells/diode/sky130_fd_sc_hvl__diode_2.spice
index 72938a3..23f113c 100644
--- a/cells/diode/sky130_fd_sc_hvl__diode_2.spice
+++ b/cells/diode/sky130_fd_sc_hvl__diode_2.spice
@@ -1,6 +1,20 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__diode_2 DIODE VGND VNB VPB VPWR
 D0 VNB DIODE ndiode_h p=5.88e+06u a=6.072e+11p
 .ends
-
diff --git a/cells/dlclkp/sky130_fd_sc_hvl__dlclkp_1.spice b/cells/dlclkp/sky130_fd_sc_hvl__dlclkp_1.spice
index 92c4917..2ca84a2 100644
--- a/cells/dlclkp/sky130_fd_sc_hvl__dlclkp_1.spice
+++ b/cells/dlclkp/sky130_fd_sc_hvl__dlclkp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__dlclkp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__dlclkp_1 CLK GATE VGND VNB VPB VPWR GCLK
 M1000 a_189_445# GATE VPWR VPB phv w=750000u l=500000u
@@ -42,4 +57,3 @@
 M1019 VPWR CLK a_1438_171# VPB phv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/dlrtp/sky130_fd_sc_hvl__dlrtp_1.spice b/cells/dlrtp/sky130_fd_sc_hvl__dlrtp_1.spice
index 056fc41..fe7975b 100644
--- a/cells/dlrtp/sky130_fd_sc_hvl__dlrtp_1.spice
+++ b/cells/dlrtp/sky130_fd_sc_hvl__dlrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__dlrtp_1 D GATE RESET_B VGND VNB VPB VPWR Q
 M1000 a_1512_107# a_917_107# a_1138_81# VNB nhv w=420000u l=500000u
@@ -42,4 +57,3 @@
 M1019 VGND D a_32_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=1.197e+11p ps=1.41e+06u
 .ends
-
diff --git a/cells/dlxtp/sky130_fd_sc_hvl__dlxtp_1.spice b/cells/dlxtp/sky130_fd_sc_hvl__dlxtp_1.spice
index c158b28..65c748b 100644
--- a/cells/dlxtp/sky130_fd_sc_hvl__dlxtp_1.spice
+++ b/cells/dlxtp/sky130_fd_sc_hvl__dlxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__dlxtp_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__dlxtp_1 D GATE VGND VNB VPB VPWR Q
 M1000 a_384_107# a_30_443# VGND VNB nhv w=420000u l=500000u
@@ -34,4 +49,3 @@
 M1015 a_806_107# a_384_107# a_650_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/einvn/sky130_fd_sc_hvl__einvn_1.spice b/cells/einvn/sky130_fd_sc_hvl__einvn_1.spice
index 47b9d60..2393850 100644
--- a/cells/einvn/sky130_fd_sc_hvl__einvn_1.spice
+++ b/cells/einvn/sky130_fd_sc_hvl__einvn_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__einvn_1 A TE_B VGND VNB VPB VPWR Z
 M1000 Z A a_413_443# VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 VPWR TE_B a_30_173# VPB phv w=750000u l=500000u
 +  ad=0p pd=0u as=2.1375e+11p ps=2.07e+06u
 .ends
-
diff --git a/cells/einvp/sky130_fd_sc_hvl__einvp_1.spice b/cells/einvp/sky130_fd_sc_hvl__einvp_1.spice
index 73ee9a6..e9865c7 100644
--- a/cells/einvp/sky130_fd_sc_hvl__einvp_1.spice
+++ b/cells/einvp/sky130_fd_sc_hvl__einvp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__einvp_1 A TE VGND VNB VPB VPWR Z
 M1000 Z A a_413_443# VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 VGND TE a_30_189# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=1.197e+11p ps=1.41e+06u
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hvl__fill_1.spice b/cells/fill/sky130_fd_sc_hvl__fill_1.spice
index d7180fe..d0888f5 100644
--- a/cells/fill/sky130_fd_sc_hvl__fill_1.spice
+++ b/cells/fill/sky130_fd_sc_hvl__fill_1.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__fill_1 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hvl__fill_2.spice b/cells/fill/sky130_fd_sc_hvl__fill_2.spice
index c97d116..aeaddc8 100644
--- a/cells/fill/sky130_fd_sc_hvl__fill_2.spice
+++ b/cells/fill/sky130_fd_sc_hvl__fill_2.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__fill_2 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hvl__fill_4.spice b/cells/fill/sky130_fd_sc_hvl__fill_4.spice
index fde047a..795d39c 100644
--- a/cells/fill/sky130_fd_sc_hvl__fill_4.spice
+++ b/cells/fill/sky130_fd_sc_hvl__fill_4.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__fill_4 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/fill/sky130_fd_sc_hvl__fill_8.spice b/cells/fill/sky130_fd_sc_hvl__fill_8.spice
index 38b720b..78c124d 100644
--- a/cells/fill/sky130_fd_sc_hvl__fill_8.spice
+++ b/cells/fill/sky130_fd_sc_hvl__fill_8.spice
@@ -1,5 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__fill_8 VGND VNB VPB VPWR
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hvl__inv_1.spice b/cells/inv/sky130_fd_sc_hvl__inv_1.spice
index 111daff..b8af050 100644
--- a/cells/inv/sky130_fd_sc_hvl__inv_1.spice
+++ b/cells/inv/sky130_fd_sc_hvl__inv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__inv_1 A VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phv w=1.5e+06u l=500000u
@@ -6,4 +21,3 @@
 M1001 Y A VGND VNB nhv w=750000u l=500000u
 +  ad=2.1375e+11p pd=2.07e+06u as=2.1375e+11p ps=2.07e+06u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hvl__inv_16.spice b/cells/inv/sky130_fd_sc_hvl__inv_16.spice
index a64799f..e4ab2da 100644
--- a/cells/inv/sky130_fd_sc_hvl__inv_16.spice
+++ b/cells/inv/sky130_fd_sc_hvl__inv_16.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__inv_16 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phv w=1.5e+06u l=500000u
@@ -66,4 +81,3 @@
 M1031 VGND A Y VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hvl__inv_2.spice b/cells/inv/sky130_fd_sc_hvl__inv_2.spice
index a72732c..6768f94 100644
--- a/cells/inv/sky130_fd_sc_hvl__inv_2.spice
+++ b/cells/inv/sky130_fd_sc_hvl__inv_2.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__inv_2 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phv w=1.5e+06u l=500000u
@@ -10,4 +25,3 @@
 M1003 VGND A Y VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hvl__inv_4.spice b/cells/inv/sky130_fd_sc_hvl__inv_4.spice
index 07d3804..f58ced3 100644
--- a/cells/inv/sky130_fd_sc_hvl__inv_4.spice
+++ b/cells/inv/sky130_fd_sc_hvl__inv_4.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__inv_4 A VGND VNB VPB VPWR Y
 M1000 VPWR A Y VPB phv w=1.5e+06u l=500000u
@@ -18,4 +33,3 @@
 M1007 Y A VGND VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/inv/sky130_fd_sc_hvl__inv_8.spice b/cells/inv/sky130_fd_sc_hvl__inv_8.spice
index 35c3d84..996552d 100644
--- a/cells/inv/sky130_fd_sc_hvl__inv_8.spice
+++ b/cells/inv/sky130_fd_sc_hvl__inv_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__inv_8 A VGND VNB VPB VPWR Y
 M1000 Y A VGND VNB nhv w=750000u l=500000u
@@ -34,4 +49,3 @@
 M1015 VPWR A Y VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lsbufhv2hv_hl/sky130_fd_sc_hvl__lsbufhv2hv_hl_1.spice b/cells/lsbufhv2hv_hl/sky130_fd_sc_hvl__lsbufhv2hv_hl_1.spice
index 3a4448a..a848f55 100644
--- a/cells/lsbufhv2hv_hl/sky130_fd_sc_hvl__lsbufhv2hv_hl_1.spice
+++ b/cells/lsbufhv2hv_hl/sky130_fd_sc_hvl__lsbufhv2hv_hl_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbufhv2hv_hl_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_hvl__lsbufhv2hv_hl_1 A LOWHVPWR VGND VNB VPB VPWR X
 M1000 a_762_107# a_662_81# X VNB nhv w=750000u l=500000u
@@ -10,4 +25,3 @@
 M1003 LOWHVPWR a_662_81# X LOWHVPWR phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=4.275e+11p ps=3.57e+06u
 .ends
-
diff --git a/cells/lsbufhv2hv_lh/sky130_fd_sc_hvl__lsbufhv2hv_lh_1.spice b/cells/lsbufhv2hv_lh/sky130_fd_sc_hvl__lsbufhv2hv_lh_1.spice
index 21eca81..59728b4 100644
--- a/cells/lsbufhv2hv_lh/sky130_fd_sc_hvl__lsbufhv2hv_lh_1.spice
+++ b/cells/lsbufhv2hv_lh/sky130_fd_sc_hvl__lsbufhv2hv_lh_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbufhv2hv_lh_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_hvl__lsbufhv2hv_lh_1 A LOWHVPWR VGND VNB VPB VPWR X
 M1000 a_847_1221# a_626_141# VGND VNB nhv w=1.5e+06u l=500000u
@@ -34,4 +49,3 @@
 M1015 a_1353_107# a_935_141# a_779_141# VNB nhv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lsbufhv2lv/sky130_fd_sc_hvl__lsbufhv2lv_1.spice b/cells/lsbufhv2lv/sky130_fd_sc_hvl__lsbufhv2lv_1.spice
index bd2a01e..0c5c165 100644
--- a/cells/lsbufhv2lv/sky130_fd_sc_hvl__lsbufhv2lv_1.spice
+++ b/cells/lsbufhv2lv/sky130_fd_sc_hvl__lsbufhv2lv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbufhv2lv_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_hvl__lsbufhv2lv_1 A LVPWR VGND VNB VPB VPWR X
 M1000 a_30_1337# A VPWR VPB phv w=420000u l=500000u
@@ -34,4 +49,3 @@
 M1015 a_30_207# a_30_1337# a_30_443# VPB phv w=420000u l=500000u
 +  ad=1.113e+11p pd=1.37e+06u as=1.197e+11p ps=1.41e+06u
 .ends
-
diff --git a/cells/lsbufhv2lv_simple/sky130_fd_sc_hvl__lsbufhv2lv_simple_1.spice b/cells/lsbufhv2lv_simple/sky130_fd_sc_hvl__lsbufhv2lv_simple_1.spice
index 5cb62e1..01be23e 100644
--- a/cells/lsbufhv2lv_simple/sky130_fd_sc_hvl__lsbufhv2lv_simple_1.spice
+++ b/cells/lsbufhv2lv_simple/sky130_fd_sc_hvl__lsbufhv2lv_simple_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbufhv2lv_simple_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_hvl__lsbufhv2lv_simple_1 A LVPWR VGND VNB VPB VPWR X
 M1000 a_762_107# a_662_81# X VNB nhv w=750000u l=500000u
@@ -10,4 +25,3 @@
 M1003 a_662_81# A LVPWR LVPWR phv w=750000u l=500000u
 +  ad=2.1375e+11p pd=2.07e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/lsbuflv2hv/sky130_fd_sc_hvl__lsbuflv2hv_1.spice b/cells/lsbuflv2hv/sky130_fd_sc_hvl__lsbuflv2hv_1.spice
index 78e36b5..86c7f82 100644
--- a/cells/lsbuflv2hv/sky130_fd_sc_hvl__lsbuflv2hv_1.spice
+++ b/cells/lsbuflv2hv/sky130_fd_sc_hvl__lsbuflv2hv_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbuflv2hv_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_hvl__lsbuflv2hv_1 A LVPWR VGND VNB VPB VPWR X
 M1000 a_1197_107# a_772_151# a_686_151# VNB nhv w=1.5e+06u l=500000u
@@ -42,4 +57,3 @@
 M1019 a_686_151# a_772_151# a_1197_107# VNB nhv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lsbuflv2hv_clkiso_hlkg/sky130_fd_sc_hvl__lsbuflv2hv_clkiso_hlkg_3.spice b/cells/lsbuflv2hv_clkiso_hlkg/sky130_fd_sc_hvl__lsbuflv2hv_clkiso_hlkg_3.spice
index a43b991..33a9209 100644
--- a/cells/lsbuflv2hv_clkiso_hlkg/sky130_fd_sc_hvl__lsbuflv2hv_clkiso_hlkg_3.spice
+++ b/cells/lsbuflv2hv_clkiso_hlkg/sky130_fd_sc_hvl__lsbuflv2hv_clkiso_hlkg_3.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbuflv2hv_clkiso_hlkg_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_hvl__lsbuflv2hv_clkiso_hlkg_3 A SLEEP_B LVPWR VGND VNB VPB VPWR
 + X
@@ -99,4 +114,3 @@
 M1047 a_362_133# a_262_107# X VNB nhv w=1e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lsbuflv2hv_isosrchvaon/sky130_fd_sc_hvl__lsbuflv2hv_isosrchvaon_1.spice b/cells/lsbuflv2hv_isosrchvaon/sky130_fd_sc_hvl__lsbuflv2hv_isosrchvaon_1.spice
index 356d348..cac4a8f 100644
--- a/cells/lsbuflv2hv_isosrchvaon/sky130_fd_sc_hvl__lsbuflv2hv_isosrchvaon_1.spice
+++ b/cells/lsbuflv2hv_isosrchvaon/sky130_fd_sc_hvl__lsbuflv2hv_isosrchvaon_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbuflv2hv_isosrchvaon_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_hvl__lsbuflv2hv_isosrchvaon_1 A SLEEP_B LVPWR VGND VNB VPB VPWR
 + X
@@ -37,4 +52,3 @@
 M1016 a_341_183# SLEEP_B a_188_1293# VNB nhv w=5e+06u l=600000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/lsbuflv2hv_symmetric/sky130_fd_sc_hvl__lsbuflv2hv_symmetric_1.spice b/cells/lsbuflv2hv_symmetric/sky130_fd_sc_hvl__lsbuflv2hv_symmetric_1.spice
index 2981137..2d746d7 100644
--- a/cells/lsbuflv2hv_symmetric/sky130_fd_sc_hvl__lsbuflv2hv_symmetric_1.spice
+++ b/cells/lsbuflv2hv_symmetric/sky130_fd_sc_hvl__lsbuflv2hv_symmetric_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__lsbuflv2hv_symmetric_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_hvl__lsbuflv2hv_symmetric_1 A LVPWR VGND VNB VPB VPWR X
 M1000 a_1197_107# a_772_151# a_686_151# VNB nhv w=1.5e+06u l=500000u
@@ -40,4 +55,3 @@
 M1018 a_1400_777# a_1406_429# a_1197_107# VNB nhv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux2/sky130_fd_sc_hvl__mux2_1.spice b/cells/mux2/sky130_fd_sc_hvl__mux2_1.spice
index 6ba00c3..112186f 100644
--- a/cells/mux2/sky130_fd_sc_hvl__mux2_1.spice
+++ b/cells/mux2/sky130_fd_sc_hvl__mux2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__mux2_1 A0 A1 S VGND VNB VPB VPWR X
 M1000 a_671_491# A1 a_94_81# VPB phv w=420000u l=500000u
@@ -26,4 +41,3 @@
 M1011 a_671_107# A0 a_94_81# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/mux4/sky130_fd_sc_hvl__mux4_1.spice b/cells/mux4/sky130_fd_sc_hvl__mux4_1.spice
index 1dc6b84..b6ae893 100644
--- a/cells/mux4/sky130_fd_sc_hvl__mux4_1.spice
+++ b/cells/mux4/sky130_fd_sc_hvl__mux4_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__mux4_1.ext - technology: sky130A
+* Copyright 2020 The SkyWater PDK Authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*
+* SPDX-License-Identifier: Apache-2.0
+
 
 .subckt sky130_fd_sc_hvl__mux4_1 A0 A1 A2 A3 S0 S1 VGND VNB VPB VPWR X
 M1000 a_339_627# A2 VPWR VPB phv w=420000u l=500000u
@@ -54,4 +69,3 @@
 M1025 a_637_107# S0 a_481_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand2/sky130_fd_sc_hvl__nand2_1.spice b/cells/nand2/sky130_fd_sc_hvl__nand2_1.spice
index 4d92ad3..f319c73 100644
--- a/cells/nand2/sky130_fd_sc_hvl__nand2_1.spice
+++ b/cells/nand2/sky130_fd_sc_hvl__nand2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__nand2_1 A B VGND VNB VPB VPWR Y
 M1000 a_233_111# B VGND VNB nhv w=750000u l=500000u
@@ -10,4 +25,3 @@
 M1003 Y B VPWR VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nand3/sky130_fd_sc_hvl__nand3_1.spice b/cells/nand3/sky130_fd_sc_hvl__nand3_1.spice
index 9eea4a3..dfb6965 100644
--- a/cells/nand3/sky130_fd_sc_hvl__nand3_1.spice
+++ b/cells/nand3/sky130_fd_sc_hvl__nand3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__nand3_1 A B C VGND VNB VPB VPWR Y
 M1000 Y A VPWR VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 Y A a_385_107# VNB nhv w=750000u l=500000u
 +  ad=2.175e+11p pd=2.08e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/nor2/sky130_fd_sc_hvl__nor2_1.spice b/cells/nor2/sky130_fd_sc_hvl__nor2_1.spice
index c84270f..98fa936 100644
--- a/cells/nor2/sky130_fd_sc_hvl__nor2_1.spice
+++ b/cells/nor2/sky130_fd_sc_hvl__nor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__nor2_1 A B VGND VNB VPB VPWR Y
 M1000 a_251_443# A VPWR VPB phv w=1.5e+06u l=500000u
@@ -10,4 +25,3 @@
 M1003 VGND B Y VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/nor3/sky130_fd_sc_hvl__nor3_1.spice b/cells/nor3/sky130_fd_sc_hvl__nor3_1.spice
index 09c48e1..86c8679 100644
--- a/cells/nor3/sky130_fd_sc_hvl__nor3_1.spice
+++ b/cells/nor3/sky130_fd_sc_hvl__nor3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__nor3_1 A B C VGND VNB VPB VPWR Y
 M1000 a_205_443# A VPWR VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 VGND B Y VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21a/sky130_fd_sc_hvl__o21a_1.spice b/cells/o21a/sky130_fd_sc_hvl__o21a_1.spice
index 38c6541..e28614c 100644
--- a/cells/o21a/sky130_fd_sc_hvl__o21a_1.spice
+++ b/cells/o21a/sky130_fd_sc_hvl__o21a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__o21a_1 A1 A2 B1 VGND VNB VPB VPWR X
 M1000 VGND a_83_87# X VNB nhv w=750000u l=500000u
@@ -18,4 +33,3 @@
 M1007 VPWR A1 a_602_443# VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o21ai/sky130_fd_sc_hvl__o21ai_1.spice b/cells/o21ai/sky130_fd_sc_hvl__o21ai_1.spice
index 8489efa..6f3eaa7 100644
--- a/cells/o21ai/sky130_fd_sc_hvl__o21ai_1.spice
+++ b/cells/o21ai/sky130_fd_sc_hvl__o21ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__o21ai_1 A1 A2 B1 VGND VNB VPB VPWR Y
 M1000 a_205_443# A1 VPWR VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 VPWR B1 Y VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22a/sky130_fd_sc_hvl__o22a_1.spice b/cells/o22a/sky130_fd_sc_hvl__o22a_1.spice
index 6ed25cf..68c5ab1 100644
--- a/cells/o22a/sky130_fd_sc_hvl__o22a_1.spice
+++ b/cells/o22a/sky130_fd_sc_hvl__o22a_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__o22a_1 A1 A2 B1 B2 VGND VNB VPB VPWR X
 M1000 a_87_81# B2 a_533_443# VPB phv w=1.5e+06u l=500000u
@@ -22,4 +37,3 @@
 M1009 a_533_443# B1 VPWR VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/o22ai/sky130_fd_sc_hvl__o22ai_1.spice b/cells/o22ai/sky130_fd_sc_hvl__o22ai_1.spice
index 7d5f6b0..ac67887 100644
--- a/cells/o22ai/sky130_fd_sc_hvl__o22ai_1.spice
+++ b/cells/o22ai/sky130_fd_sc_hvl__o22ai_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__o22ai_1 A1 A2 B1 B2 VGND VNB VPB VPWR Y
 M1000 VGND A2 a_36_113# VNB nhv w=750000u l=500000u
@@ -18,4 +33,3 @@
 M1007 a_36_113# A1 VGND VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or2/sky130_fd_sc_hvl__or2_1.spice b/cells/or2/sky130_fd_sc_hvl__or2_1.spice
index f536323..b5c4ea7 100644
--- a/cells/or2/sky130_fd_sc_hvl__or2_1.spice
+++ b/cells/or2/sky130_fd_sc_hvl__or2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__or2_1 A B VGND VNB VPB VPWR X
 M1000 X a_84_443# VPWR VPB phv w=1.5e+06u l=500000u
@@ -14,4 +29,3 @@
 M1005 a_84_443# B VGND VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/or3/sky130_fd_sc_hvl__or3_1.spice b/cells/or3/sky130_fd_sc_hvl__or3_1.spice
index 2f1b9db..cb88203 100644
--- a/cells/or3/sky130_fd_sc_hvl__or3_1.spice
+++ b/cells/or3/sky130_fd_sc_hvl__or3_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__or3_1 A B C VGND VNB VPB VPWR X
 M1000 X a_30_107# VPWR VPB phv w=1.5e+06u l=500000u
@@ -18,4 +33,3 @@
 M1007 VGND C a_30_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/probe_p/sky130_fd_sc_hvl__probe_p_8.spice b/cells/probe_p/sky130_fd_sc_hvl__probe_p_8.spice
index 0035b08..4b66a99 100644
--- a/cells/probe_p/sky130_fd_sc_hvl__probe_p_8.spice
+++ b/cells/probe_p/sky130_fd_sc_hvl__probe_p_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__probe_p_8 A VGND VNB VPB VPWR X
 M1000 X a_45_443# VPWR VPB phv w=1.5e+06u l=500000u
@@ -46,4 +61,3 @@
 M1021 X a_45_443# VGND VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/probec_p/sky130_fd_sc_hvl__probec_p_8.spice b/cells/probec_p/sky130_fd_sc_hvl__probec_p_8.spice
index dcc368a..4b12821 100644
--- a/cells/probec_p/sky130_fd_sc_hvl__probec_p_8.spice
+++ b/cells/probec_p/sky130_fd_sc_hvl__probec_p_8.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__probec_p_8 A VGND VNB VPB VPWR X
 M1000 X a_45_443# VPWR VPB phv w=1.5e+06u l=500000u
@@ -46,4 +61,3 @@
 M1021 X a_45_443# VGND VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/schmittbuf/sky130_fd_sc_hvl__schmittbuf_1.spice b/cells/schmittbuf/sky130_fd_sc_hvl__schmittbuf_1.spice
index 154ce1a..70465b2 100644
--- a/cells/schmittbuf/sky130_fd_sc_hvl__schmittbuf_1.spice
+++ b/cells/schmittbuf/sky130_fd_sc_hvl__schmittbuf_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__schmittbuf_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_hvl__schmittbuf_1 A VGND VNB VPB VPWR X
 R0 a_78_463# VGND mrdn_hv w=290000u l=1.355e+06u
@@ -20,4 +35,3 @@
 M1007 a_217_207# A a_117_181# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=1.113e+11p ps=1.37e+06u
 .ends
-
diff --git a/cells/sdfrbp/sky130_fd_sc_hvl__sdfrbp_1.spice b/cells/sdfrbp/sky130_fd_sc_hvl__sdfrbp_1.spice
index 1b01f39..b903023 100644
--- a/cells/sdfrbp/sky130_fd_sc_hvl__sdfrbp_1.spice
+++ b/cells/sdfrbp/sky130_fd_sc_hvl__sdfrbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdfrbp_1 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 a_1569_126# a_1290_126# VGND VNB nhv w=420000u l=500000u
@@ -86,4 +101,3 @@
 M1041 a_339_655# a_222_131# a_518_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfrtp/sky130_fd_sc_hvl__sdfrtp_1.spice b/cells/sdfrtp/sky130_fd_sc_hvl__sdfrtp_1.spice
index 70e359d..865aa62 100644
--- a/cells/sdfrtp/sky130_fd_sc_hvl__sdfrtp_1.spice
+++ b/cells/sdfrtp/sky130_fd_sc_hvl__sdfrtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdfrtp_1 CLK D RESET_B SCD SCE VGND VNB VPB VPWR Q
 M1000 a_2539_181# a_1212_100# a_2360_115# VNB nhv w=420000u l=500000u
@@ -82,4 +97,3 @@
 M1039 VPWR a_2616_417# a_2574_543# VPB phv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfsbp/sky130_fd_sc_hvl__sdfsbp_1.spice b/cells/sdfsbp/sky130_fd_sc_hvl__sdfsbp_1.spice
index d7a44ce..6abe38f 100644
--- a/cells/sdfsbp/sky130_fd_sc_hvl__sdfsbp_1.spice
+++ b/cells/sdfsbp/sky130_fd_sc_hvl__sdfsbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdfsbp_1 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q Q_N
 M1000 VPWR SCE a_30_569# VPB phv w=420000u l=500000u
@@ -86,4 +101,3 @@
 M1041 a_2501_543# a_1243_116# a_2394_107# VNB nhv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfstp/sky130_fd_sc_hvl__sdfstp_1.spice b/cells/sdfstp/sky130_fd_sc_hvl__sdfstp_1.spice
index f551603..0ae405e 100644
--- a/cells/sdfstp/sky130_fd_sc_hvl__sdfstp_1.spice
+++ b/cells/sdfstp/sky130_fd_sc_hvl__sdfstp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdfstp_1 CLK D SCD SCE SET_B VGND VNB VPB VPWR Q
 M1000 VPWR a_1669_87# a_1686_543# VPB phv w=420000u l=500000u
@@ -82,4 +97,3 @@
 M1039 a_637_107# SCE a_481_107# VNB nhv w=420000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxbp/sky130_fd_sc_hvl__sdfxbp_1.spice b/cells/sdfxbp/sky130_fd_sc_hvl__sdfxbp_1.spice
index 1a27e8d..e9db148 100644
--- a/cells/sdfxbp/sky130_fd_sc_hvl__sdfxbp_1.spice
+++ b/cells/sdfxbp/sky130_fd_sc_hvl__sdfxbp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdfxbp_1 CLK D SCD SCE VGND VNB VPB VPWR Q Q_N
 M1000 VPWR SCD a_268_659# VPB phv w=420000u l=500000u
@@ -74,4 +89,3 @@
 M1035 VPWR a_1124_81# a_1067_107# VPB phv w=1e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdfxtp/sky130_fd_sc_hvl__sdfxtp_1.spice b/cells/sdfxtp/sky130_fd_sc_hvl__sdfxtp_1.spice
index f5ca323..06362da 100644
--- a/cells/sdfxtp/sky130_fd_sc_hvl__sdfxtp_1.spice
+++ b/cells/sdfxtp/sky130_fd_sc_hvl__sdfxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdfxtp_1 CLK D SCD SCE VGND VNB VPB VPWR Q
 M1000 a_2310_107# a_938_107# a_2123_543# VNB nhv w=420000u l=500000u
@@ -66,4 +81,3 @@
 M1031 a_2123_543# a_938_107# a_1688_81# VPB phv w=1e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlclkp/sky130_fd_sc_hvl__sdlclkp_1.spice b/cells/sdlclkp/sky130_fd_sc_hvl__sdlclkp_1.spice
index cc97a84..031a63f 100644
--- a/cells/sdlclkp/sky130_fd_sc_hvl__sdlclkp_1.spice
+++ b/cells/sdlclkp/sky130_fd_sc_hvl__sdlclkp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__sdlclkp_1 CLK GATE SCE VGND VNB VPB VPWR GCLK
 M1000 a_1261_133# a_495_311# VGND VNB nhv w=420000u l=500000u
@@ -46,4 +61,3 @@
 M1021 VPWR CLK a_1630_171# VPB phv w=750000u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/sdlxtp/sky130_fd_sc_hvl__sdlxtp_1.spice b/cells/sdlxtp/sky130_fd_sc_hvl__sdlxtp_1.spice
index 1a65c41..dca1fed 100644
--- a/cells/sdlxtp/sky130_fd_sc_hvl__sdlxtp_1.spice
+++ b/cells/sdlxtp/sky130_fd_sc_hvl__sdlxtp_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__sdlxtp_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_hvl__sdlxtp_1 D GATE SCD SCE VGND VNB VPB VPWR Q
 M1000 a_1724_593# a_1214_107# a_1480_107# VPB phv w=420000u l=500000u
@@ -50,4 +65,3 @@
 M1023 a_944_107# GATE VPWR VPB phv w=750000u l=500000u
 +  ad=2.1375e+11p pd=2.07e+06u as=0p ps=0u
 .ends
-
diff --git a/cells/xnor2/sky130_fd_sc_hvl__xnor2_1.spice b/cells/xnor2/sky130_fd_sc_hvl__xnor2_1.spice
index 28be94d..de4fe69 100644
--- a/cells/xnor2/sky130_fd_sc_hvl__xnor2_1.spice
+++ b/cells/xnor2/sky130_fd_sc_hvl__xnor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__xnor2_1 A B VGND VNB VPB VPWR Y
 M1000 a_539_443# A VPWR VPB phv w=1.5e+06u l=500000u
@@ -22,4 +37,3 @@
 M1009 a_30_107# B VPWR VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=0p ps=0u
 .ends
-
diff --git a/cells/xor2/sky130_fd_sc_hvl__xor2_1.spice b/cells/xor2/sky130_fd_sc_hvl__xor2_1.spice
index dc6e75e..a9de69f 100644
--- a/cells/xor2/sky130_fd_sc_hvl__xor2_1.spice
+++ b/cells/xor2/sky130_fd_sc_hvl__xor2_1.spice
@@ -1,4 +1,19 @@
-* NGSPICE file created from sky130_fd_sc_hvl__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_hvl__xor2_1 A B VGND VNB VPB VPWR X
 M1000 a_531_443# a_30_443# X VPB phv w=1.5e+06u l=500000u
@@ -22,4 +37,3 @@
 M1009 a_187_443# B a_30_443# VPB phv w=1.5e+06u l=500000u
 +  ad=0p pd=0u as=4.275e+11p ps=3.57e+06u
 .ends
-