Silicon Machining

Thanks for all the information on G-Codes to Stepper Pulses. There
seems to be a lot to learn any way you do it.

Has anyone considered making their own desktop chip foundry? I read
that Charles Moore, inventor of Forth got into the National Bureau of
Standards integrated circuit cell definition library and designed his
own CPU. I've also read the pamphlet published by Lindsay books on
making your own mirrors in a vacuum jar. It seemed to me there should
be some way to combine the two ideas with an external laser under XY
control to replace some of the expensive chemicals used in industry to
build integrated circuits in a machine that is no bigger than a
mill-lathe.

The laser processing would be slower and may not have as fine resolution
as industry now uses but it could be great for making a few chips to
build a non-Intel PC and other hard to get devices or repair something.
Any information to further this like how to access the cell definition
library, or what size laser is needed to zap away the right parts of
chips and coating materials without drilling through the whole unit?
What minimum chemicals are needed to make the different layers?

Kirk