skywater-pdk

It looks neat, but the process node is 1 um with 3 metal layers. The open Skywater PDK is 130 nm : https://github.com/google/skywater-pdk (though I don't know how reliable the PDK is?)

From working in a somewhat related discipline, the PDKs for the high end nodes (think tsmc N16 and lower) are quite hard to obtain and require your org to pass security audit. In addition to that the cadence licenses are priced very much for a big-org rather than a startup. Does your chip absolutely need a modern node? I'm assuming you've seen the open source skywater pdk, but here it is just in case. https://github.com/google/skywater-pdk

That would be really neat, but I haven't seen anyone even make a CMOS imager on SKY130. https://github.com/google/skywater-pdk One could make an array of thermopiles, like the hacker that made their own imager out of discrete diodes (digiOBSCURA) . But each pixel would cost $7. https://www.digikey.com/en/products/detail/excelitas-technol... One might be able to make an array of thermistors (possibly with active cooling using a peltier) like the diycamera (digiOBSCURA) below. Might be an application of combining many RC oscillators in a tree and recovering the signal with an FFT. I have a gut feeling this is possible, but haven't show it. Isn't this the same as or similar to your keyboard multiplexer design? https://www.digikey.com/en/products/detail/panasonic-electro... https://github.com/IdleHandsProject/diycamera (digiOBSCURA) One could