Chinese 3D NAND champion YMTC has filed a lawsuit against Micron in the Northern District of California (via Blocks & Files) accusing the American company of infringing 11 of its patents covering various aspects of 3D NAND operation. Yangtze Memory asks the court to order Micron to stop the stop the sale of Micron's memory in the U.S. while awarding it with royalty fees.
YMTC says that Micron's 3D NAND memory with 96 layers (B27A), 128 layers (B37R), 176 layers (B47R), and 232 layers (B58R) as well as some of Micron's DDR5 SDRAM products (Y2BM-series) infringe 11 of its patents or patents applications filed in the U.S. The list of patent applications gathered by @lithos_graphein indicates that they cover general aspects of 3D NAND and DRAM functionality, which may essentially mean that YMTC is trying to make Micron's life harder in a get to gain a leverage against the U.S. government.
