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Re:Google offers free fabbing for 130nm open-source chips by namibj on Tuesday July 07, 2020 @04:37PM (#23763752)
I suggest you take a look at how easy maskless photolithography is: https://sam/zeloof.xyz

Theoretically it should be feasible to fab 350 nm without double-patterning by optimizing a simple immersion DLP/DMD i-line stepper.

I think ArF immersion with double-patterning should be able to do maskless 90 nm.

Re:Google offers free fabbing for 130nm open-source chips by kanwisher on Wednesday July 08, 2020 @06:17AM (#23768519)
fixing the url http://sam.zeloof.xyz/