I think abusing a write-off electron microscope to side step the need for masks is also an interesting idea, however, I believe acquiring wafers of sufficient quality and depositing layers to be etched could be the bigger challenge here.
And the clean environment as a whole. That's a massive investment and there are a million ways to mess that up.
And the clean environment as a whole. That's a massive investment and there are a million ways to mess that up.