Intel proposes a different position for the control chip in HBM memory. Instead of sitting beneath all memory layers, the interface die would sit between them or higher in the stack. Published on September 10, 2026, application US20260271782A1 addresses two constraints of tall stacks: unequal signal paths and heat.
The middle favors signals; the top favors cooling
In the central arrangement, memory chips sit above and below the interface logic, reducing the difference between paths to nearby and distant layers. Additional through-silicon vias connect the interface die through the lower memory chips to the contacts at the bottom. A higher position brings it closer to the heat sink but sacrifices some signal-path balance. Paragraphs 0050–0054 and Figures 3–5 describe this trade-off.
The cited 60 percent refers only to a smaller difference in signal-path lengths in an example with six memory chips. It is not a measured bandwidth or latency improvement.
Assessment: Packaging becomes a design variable
For AI accelerators, the interesting question is whether taller memory stacks could operate reliably. In our assessment, the deciding factor is whether the benefit in a finished package justifies the additional interconnect effort. Comparable measurements of temperature, transfer rate and manufacturing yield would be needed. The reviewed passages provide no such validation, and they do not establish a specific production product.
Document status, checked September 12: a published US application by Intel Corporation, filed March 10, 2025, as 19/075,591. The cover lists no earlier priority claim. This A1 publication does not establish a patent grant.