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> 3D transistors already expanded the limit of how small parts can get before physics hits you in the face with a baseball bat.

Yes, but we are just starting 10nm now. Go two more nodes (if I understand correctly that is meant here by cycles) and you are at 5nm.

https://en.wikipedia.org/wiki/5_nanometer

to put that into perspective: "An Australian team announced that they fabricated a single functional transistor out of 7 atoms that measured 4 nm in length."

Maybe we can make our way down to single atom transistors eventually, but who knows how long it will take to make that commercially viable.




We already have a single atom transistor (https://en.wikipedia.org/wiki/Single-atom_transistor), but you're right that it's far from commercially viable.




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