CXMT May Break The Memory Bottleneck

The reported Korean-media signal says China's CXMT is testing a pilot production line for bonded DRAM in Hefei. Bonded DRAM separates the memory cell array and peripheral circuitry onto different wafers and then bonds them together. Samsung is reportedly developing its own bonded DRAM under the "B1b" project, while SK Hynix is pursuing similar technology.

The memory-long thesis depends on supply staying tight because advanced DRAM and HBM capacity are hard to scale. Bonded DRAM is dangerous to that thesis because it could increase density without requiring the same EUV bottleneck. If CXMT can scale this commercially in the 2027-2028 window, it becomes the exact kind of credible memory innovation that breaks the scarcity story. Not confirmed yet. But it is now a named falsifier.