IBM's '0.7nm' chip has nothing on it that measures 0.7nm (newsroom.ibm.com)
IBM's new 'nanostack' stacks transistors vertically to claim 0.7nm, or '7 angstroms' — roughly twice the density of its 2021 2nm chip, with 50% more performance or 70% better efficiency.
But the number is marketing, not measurement: the smallest real features are around 5nm. As one engineer put it, the name scales better than the tech. And IBM has no production fabs — it paid GlobalFoundries $1.5B in 2014 to take them away.
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