Advanced packaging, not the GPU die, is the new limiter for AI accelerators

HSINCHU, Taiwan — The AI hardware shortage has a new address. It is not only the leading-edge wafer. It is the advanced packaging line that stitches high-bandwidth memory to a logic die, and those lines are booked as tightly as any EUV bay.

Packaging houses said customers are now dual-sourcing interposers and quoting 2026 capacity as if it were a commodity future. A missed CoWoS window can strand a GPU that already cost tens of thousands of dollars to fabricate.

Design teams are responding by simplifying stacks and accepting slightly lower bandwidth rather than missing a cloud-launch window. The market is pricing packaging vendors like mini-foundries, because for this cycle they are.