NAND replacement bites the dust Alternative memory technologies can be pursued for decades – five in the case of phase change – and still not become mainstream. Another is cross-point memory. In 2002, Unity Semiconductor set out to develop an IBM-developed memory technology called CMOxIM – intended to be a non-volatile solid state memory to replace NAND. CMOxIM was designed to scale beyond the limitations of the transistor technology currently used in NAND flash memory. The selling pitch for CMOxIM was that it was a small geometry, multi-layer cross- point memory array with higher density, faster performance, lower manufacturing costs, and greater data reliability than NAND.