The problem, per SK, is that HBM cubes are capped at a total thickness of 775 microns, the standard thickness of a 300mm logic wafer.
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August 24, 2026 at 5:55 PM
SK hynix pushes hybrid bonding HBM5 as AI memory hits 775-micron ceiling — firm extends MR-MUF through Nvidia Rubin
Toms Hardware
