Google has done a lot of effort in that direction. The first ever chips have already been produced that are fully open source from the tools used to make to the complete tool chain need to manufacture them.
There is a huge amount of great stuff going on this this area.
Tim Ansell - Skywater PDK: Fully open source manufacturable PDK for a 130nm process
There is a huge amount of great stuff going on this this area.
Tim Ansell - Skywater PDK: Fully open source manufacturable PDK for a 130nm process
https://www.youtube.com/watch?v=EczW2IWdnOM