Intel Unveils XBM Memory Patent Technology, Aiming at HBM4

Intel has unveiled a new patented technology called XBM, which is designed as an alternative to HBM4 and promises to deliver higher bandwidth at a lower cost.

XBM stands for Extended Bandwidth Memory and is a DRAM memory solution. Its package size will remain consistent with HBM4, with each chip's capacity ranging from 0.5GB to 5GB, featuring a 32GT/s UCIe universal chiplet interconnect interface.

The core breakthrough of XBM lies in the migration of the manufacturing process: traditional DRAM memory cells are fabricated in the front-end-of-line (FEOL) , which is the underlying silicon substrate natively used for transistor fabrication. In contrast, XBM moves the 1T1C memory cell to the back-end-of-line (BEOL), placing it within the metal via stack region above the transistors, and employs thin-film transistor (TFT) technology.

Notably, the patent's focus is not on the memory cell itself, but on a customized packaging solution: Intel introduces Memory-on-Package (MoP) integration and an inverted cantilever structure to optimize Z‑axis stack height. Traditional MoP adds 300–350 micrometers of thickness, whereas the new structure reduces stack height, eliminates anti-warpage stiffeners, and allows voltage regulators to power the DRAM directly, achieving a smaller footprint and lower-cost package form factor.

It is reported that the commercialization of XBM technology is expected to take place after 2030.