Yeah, it is TSMC, see: https://3dfabric.tsmc.com/english/dedicatedFoundry/technology/3DFabric.htm https://3dfabric.tsmc.com/english/dedicatedFoundry/technolog.

Yeah, it is TSMC, see: https://3dfabric.tsmc.com/english/dedicatedFoundry/technology/3DFabric.htm https://3dfabric.tsmc.com/english/dedicatedFoundry/technolog... Older explanation, but lots of this stuff is just now shipping: https://www.anandtech.com/show/16051/3dfabric-the-home-for-tsmc-2-5d-and-3d-stacking-roadmap https://www.anandtech.com/show/16051/3dfabric-the-home-for-t... Not that AMD doesn't deserve any credit, they have considerable multi chip experience under their belt and undoubtedly served as a guinea pig/pipe cleaner for TSMC's advanced package.