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Lithography masks for early integrated circuits were drawn by hand iirc.
by grishka 2y ago
Lithography masks for early integrated circuits were drawn by hand iirc.
- jasomill 2y agoNot just ICs, microprocessors: https://en.wikipedia.org/wiki/Rubylith https://en.wikipedia.org/wiki/Rubylith
- grishka 2y ago> Certain digital image editing programs that have masking features may use a red overlay to designate masked areas, mimicking the use of actual Rubylith film. Oh so that's why masking mode in Photoshop is a red overlay?! TIL.