open-source-silicon.dev

<https://github.com/IHP-GmbH/IHP-Open-PDK/issues/443|#443 Klayout LVS of GDS vs two different CDL netlists is clean>
Issue created by <https://github.com/b10346|b10346>
Hello,

It is found strange behavior of LVS deck in Klayout version 29.12.  
Two CDL netlists (cdl_v1 and cdl_v2) have a difference in a pins (B1 and B2) to gates connection (see attached files).  
Klayout LVS shows "Clean" results with the same GDS layout.  
The correct one is cdl_v1.

Merging of stacked MOS structure can cause potential errors in circuits at clean LVS results.

<https://private-user-images.githubusercontent.com/170172006/432299510-995c4b7e-883f-41a8-8394-e2afc3148fdd.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDQzMTEzMTQsIm5iZiI6MTc0NDMxMTAxNCwicGF0aCI6Ii8xNzAxNzIwMDYvNDMyMjk5NTEwLTk5NWM0YjdlLTg4M2YtNDFhOC04Mzk0LWUyYWZjMzE0OGZkZC5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNDEwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDQxMFQxODUwMTRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1lNmE3OTFmNzg2ZTQyZjUwMjk5MDViMmZhZTExOWUxYzIyNjAyOWU4NmFkMWQwODQyZjI5OTQ1YmI5MmRlODQwJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.PTKjw2WCCFzen5bUK4oKfe3DhlT-nCmWvL8UeTNX5S0|[Image](https://private-user-images.githubusercontent.com/170172006/432299510-995c4b7e-883f-41a8-8394-e2afc3148fdd.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDQzMTEzMTQsIm5iZiI6MTc0NDMxMTAxNCwicGF0aCI6Ii8xNzAxNzIwMDYvNDMyMjk5NTEwLTk5NWM0YjdlLTg4M2YtNDFhOC04Mzk0LWUyYWZjMzE0OGZkZC5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNDEwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDQxMFQxODUwMTRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1lNmE3OTFmNzg2ZTQyZjUwMjk5MDViMmZhZTExOWUxYzIyNjAyOWU4NmFkMWQwODQyZjI5OTQ1YmI5MmRlODQwJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.PTKjw2WCCFzen5bUK4oKfe3DhlT-nCmWvL8UeTNX5S0)>  
<https://private-user-images.githubusercontent.com/170172006/432299512-fb825712-d313-4c50-b441-ae9be058c7e5.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDQzMTEzMTQsIm5iZiI6MTc0NDMxMTAxNCwicGF0aCI6Ii8xNzAxNzIwMDYvNDMyMjk5NTEyLWZiODI1NzEyLWQzMTMtNGM1MC1iNDQxLWFlOWJlMDU4YzdlNS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNDEwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDQxMFQxODUwMTRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT03ZmMyOTJjMmUzNTBlODA5MjgzNjkzNTcxOTA4MWEzZmExMDEzNjc3OTc3Y2FmMzA4NTkwYzhjNDljNDIxNGU4JlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.4vg-NaGiVvEvip7uoMb-B9nNCJgRWPVBXqNLxmKnDFI|[Image](https://private-user-images.githubusercontent.com/170172006/432299512-fb825712-d313-4c50-b441-ae9be058c7e5.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDQzMTEzMTQsIm5iZiI6MTc0NDMxMTAxNCwicGF0aCI6Ii8xNzAxNzIwMDYvNDMyMjk5NTEyLWZiODI1NzEyLWQzMTMtNGM1MC1iNDQxLWFlOWJlMDU4YzdlNS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNDEwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDQxMFQxODUwMTRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT03ZmMyOTJjMmUzNTBlODA5MjgzNjkzNTcxOTA4MWEzZmExMDEzNjc3OTc3Y2FmMzA4NTkwYzhjNDljNDIxNGU4JlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.4vg-NaGiVvEvip7uoMb-B9nNCJgRWPVBXqNLxmKnDFI)>  
<https://private-user-images.githubusercontent.com/170172006/432299511-4166b1a6-3312-400d-912a-a15ed0acf75e.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDQzMTEzMTQsIm5iZiI6MTc0NDMxMTAxNCwicGF0aCI6Ii8xNzAxNzIwMDYvNDMyMjk5NTExLTQxNjZiMWE2LTMzMTItNDAwZC05MTJhLWExNWVkMGFjZjc1ZS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNDEwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDQxMFQxODUwMTRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT00NTFmOTA5YzdhYmIyNTUxODJmMjg3NWVlYjBiM2E0OGQ2OWMxODdjNjI3NGIwMmQ2MDA2MjU4Y2JiNjEzNDhhJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.4w8BQ0GUQp0wwJb6A5Pa0X6h_vLxJAabKutTmgb1iWE|[Image](https://private-user-images.githubusercontent.com/170172006/432299511-4166b1a6-3312-400d-912a-a15ed0acf75e.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDQzMTEzMTQsIm5iZiI6MTc0NDMxMTAxNCwicGF0aCI6Ii8xNzAxNzIwMDYvNDMyMjk5NTExLTQxNjZiMWE2LTMzMTItNDAwZC05MTJhLWExNWVkMGFjZjc1ZS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNDEwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDQxMFQxODUwMTRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT00NTFmOTA5YzdhYmIyNTUxODJmMjg3NWVlYjBiM2E0OGQ2OWMxODdjNjI3NGIwMmQ2MDA2MjU4Y2JiNjEzNDhhJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.4w8BQ0GUQp0wwJb6A5Pa0X6h_vLxJAabKutTmgb1iWE)>
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>