I think it's less any regulation and more the lack of products to facilitate it. The guys rolling their own from scratch on youtube weren't anywhere near 300 nm last I checked.
replyThere are plenty of products to facilitate small-scale semiconductor manufacture: university nanofabs all over the world have them.
replyYou can, too, without much/any paperwork... if you have the funds.
> I am pretty sure there are entire YouTube channels dedicated to this.
replyIP laws. You personally might be able to do this. But should you attempt to sell a device that makes it easy for anyone to do, you will get sued into oblivion.
replyThere's a big difference.