❶ YMTC has filed a lawsuit against Micron in the U.S., accusing Micron of infringing 11 of its patents related to 3D NAND technology. ❷ YMTC is seeking to halt Micron's sales in the U.S. and is asking for royalty fees. ❸ Despite facing challenges due to U.S. sanctions, YMTC continues to innovate and improve its 3D NAND technology.