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Sibling has a good comment about silicon. Another reason you're printing something like 100B transistors. So that's at least 100B raster steps. It would just take too long.
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The closest thing there is is e-beam lithography. It isn't really practical.
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Isnt that smaller? I was under the impression e-beam is one of the (possible) next generation chip technologies.

Getting it to scale is the issue

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AFAIK you can't really print crystalline silicon so they have to start with a wafer and dope/etch into it to form transistors.
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