Making 100 transistors silicon integrated circuit chips in your garage (youtube.com)

Interesting. Curious what the yield is. And he doesn't need a cleanroom, or work with dangerous chemicals like HF?

Making the masks in photoshop is a really neat trick. Reminds me of Bob Moore of Forth fame who said something like "once you have enough code to draw a square you are half way to a chip design package".

Related thread: https://news.ycombinator.com/item?id=28176255

Direct link to the blogpost: http://sam.zeloof.xyz/second-ic/

I loved this, it made me realise how close to negative development is to photolithography. When doing separate etching layers how are wafers lined up or is everything done in situ?