German court orders Micron injunctions in YMTC 3D NAND patent dispute

The ruling threatens Micron’s flash supply into Germany and could tighten NAND availability across Europe if it holds on appeal.

A German court has issued injunctions against Micron after finding that it infringed two of YMTC’s 3D NAND utility model patents, potentially constraining Micron’s memory shipments into Germany and affecting NAND supply in Europe. The Sept. 18 ruling, stemming from a lawsuit YMTC filed in late 2025 at the Munich 1 Regional Court, covers DE202020006166U1 and DE202021004551U1 and is limited to first-instance decisions that can be paused if Micron wins on appeal. Micron disputes the judgment, has already appealed, and is simultaneously attacking the validity of YMTC’s patents in multiple jurisdictions. This is the latest step in a broader Micron–YMTC conflict that began with a 2023 3D NAND patent suit in California and has expanded into more than 20 patent-related actions and countersuits across the U.S., China, Europe and the U.K. For hardware vendors and cloud providers, any sustained supply limits on Micron’s NAND in Germany could tighten regional flash availability and pricing while the two companies continue their global IP war over 3D NAND technology.