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Awesome video and process, we've been talking about this at work since it showed up here and have a few questions if you don't mind: How far do you think you'd
by bane 7y ago
Awesome video and process, we've been talking about this at work since it showed up here and have a few questions if you don't mind:
How far do you think you'd be from making a simple 8-bit CPU like a 6502?
Have you thought about illuminating the initial film exposure as well as the substrate exposure (on the slide glass) using monochromatic light sources like a mercury UV lamp?
Instead of a vacuum pump to flatten the film during exposure, how about electrostatic charges?
- EvanAnderson 7y agoI looked up the 4004 earlier today, thinking about DIY microprocessors. It was 10 micron process. 20 micron is more like 1960-level technology, unfortunately.
- bkraz 7y agoThanks! I'm very far from making a CPU. Check out Sam Zeloof's work to see some of the other parts of home IC fabrication. Creating the mask is just one part of the process, and dialing in diffusion, oxide growth, metal deposition would take a lot of additional effort. Yes. My original attempt (years ago) was to use a standard photographic enlarger: replace the lens with quartz, place the paper or plastic master design on a UV light source on the table, then place the microscope slide with photoresist in the enlarger where the film would normally go. One problem is the lens is not setup to cover a whole microscope slide. Another problem is not enough UV light getting through the whole optical system -- exposure would have been hours if it worked at all. Haven't tried electrostatic. Considered low-tack adhesive (3M post-it).