There's a small-scale IC fabrication system under development. It costs $5-30M, fits in an office, and can manufacture 0.5-inch wafers with CMOS and MEMS. The company provides training and rents out time on the machines.

https://www.yokogawa.com/yjp/solutions/solutions/minimal-fab...

HN post: https://news.ycombinator.com/item?id=24540562