Hold on, if I had an electron microscope, can I just put in a decapped cheap large format photodiode under it, jack the beam current way up, and start etching trenches on it?
replyI don't think so: it's a microscope, not a synchrotron. :D
replyI meant "drawing" on a photoresist layer with a SEM and then wet-etching it. Also all silicon in a photodiode is doped, so the etched parts would be of little use, I believe.
And the clean environment as a whole. That's a massive investment and there are a million ways to mess that up.
replyThere's this guy doing clean room in a shed on YouTube: https://www.youtube.com/@Dr.Semiconductor
reply> however, I believe acquiring wafers of sufficient quality and depositing layers to be etched could be the bigger challenge here
replyDefinitely hard for a home fab but how about a community fab? Not necessarily a geographic community.
for making research grade devices you barely need a cleanroom
replywafers are the easy bit.
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