Intel EMIB-T Packaging Faces Yield Hurdles, 50% Target for 2027 Mass Production

Intel's next-generation advanced packaging technology EMIB-T is facing serious yield challenges, according to Taiwanese media reports. ABF substrate supplier Unimicron said at its July 29 earnings call that the technology is "not yet mature," and the three EMIB-T substrate suppliers — Unimicron, Ibiden and Shinko Electric — are targeting only a 50% yield rate for the initial mass production phase at the end of 2027.

A direct challenge to TSMC's CoWoS-L

EMIB-T is Intel's advanced packaging answer to TSMC's CoWoS-L. The key difference: silicon bridges are embedded directly into the substrate rather than using a silicon interposer, making substrate suppliers the critical link in determining success. Google's ninth-generation TPU is confirmed to adopt EMIB-T packaging for mass production in 2028, with MediaTek handling chip co-design. If the chip reaches mass production, its shipment volume could challenge Nvidia.

Profit guarantees, but uncertainty remains

Unimicron said Intel has provided a profit guarantee mechanism, ensuring suppliers remain profitable even if yields disappoint. Once the 50% yield target is achieved, profit margins are expected to be above the company's average. Whether EMIB-T can meet its mass production goals by the end of 2027 remains highly uncertain.