Which foundries are the most friendly to open-source? Is there an open-source #PDK?
Kholdoun Torki of Circuits-Multi-Projects (https://mycmp.fr/) provided a great overview:
"Towards Foundry PDKs on Free CAD Tools"
https://peertube.f-si.org/videos/watch/db22ddc7-85cf-4356-bc46-af90e3f72fd6