A court in Germany has granted court injunctions against Micron, marking a win for YMTC on the European/German front in the 3-year legal war between the two companies over memory technology patents.
According to a Digitimes report, the court ruled on Sept. 18 that Micron did infringe YMTC’s 3D NAND technology patents in two instances. The injunctions could restrict Micron’s supply in Germany and impact the broader European NAND market. Micron said it disagreed with the court ruling and has already filed an appeal. It is also challenging the validity of the related patents in separate legal cases across various countries.
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YMTC filed the lawsuit that won the recent injunctions in late 2025 at the Munich 1 Regional Court, opening five cases involving four German utility models and a European patent. The court granted injunctions on two of the utility models with 10-year protection periods — DE202020006166U1 (case No. 7O12615/25) and DE202021004551U1 (case No. 12614/25) — and adjourned the others. The injunctions are only first-instance rulings and can be suspended if Micron successfully appeals at the Munich Higher Regional Court.
The ruling is the latest development in a years-long dispute between the two memory makers that started in 2023 when YMTC sued Micron in California, alleging violations of eight 3D NAND architecture patents .
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