TLDR: “3nm” only means “the technology node after 5nm” and doesn’t relate to any physical feature size.
It’s almost exclusively marketing bs terminology: https://en.m.wikipedia.org/wiki/3_nm_process
ArrowMax
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Cake day: July 1st, 2023
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No doubt the advancements are significant, but “3nm” as a label is just deceptive.
Nothing in the node relates to that number, as far as I can tell, and the gate pitch, which used to be what that number meant, is in the realm of 40-45nm.