News: Microelectronics
19 June 2026
Munich District Court rules in favour of Infineon in patent infringement cases against Innoscience
Infineon Technologies AG of Munich, Germany says that the Munich District Court (Landgericht München I) has ruled in its favor in two further patent infringement cases – specifically one based on a patent and one based on a utility model – concerning gallium nitride (GaN) technology between Infineon and Innoscience.
The cases concern the unauthorized use of GaN technologies patented by Infineon by China-based Innoscience (Suzhou) Technology Holding Co Ltd, which manufactures GaN-on-silicon power chips on 8” silicon wafers, With the latest rulings, the court prohibits Innoscience from manufacturing, selling and marketing additional patent-infringing products in Germany. Furthermore, the court has ordered Innoscience to pay damages to Infineon.
Infineon says that this marks Innoscience’s third and fourth legal defeats in a series of court cases, each of which found that Innoscience’s products infringe Infineon’s patents. Courts and authorities in both Germany and the USA have repeatedly concluded that Innoscience’s products infringe Infineon’s intellectual property rights. Prior rulings include the decision against Innoscience from 1 August 2025, in an initial German proceeding. Furthermore, on 7 May, the Full Commission of the US International Trade Commission (ITC) found that Innoscience had infringed an Infineon patent in the field of GaN technology. Additional proceedings regarding the infringement of other Infineon patents are pending in the USA and Germany.
“Today’s ruling demonstrates the value of our GaN portfolio and underscores our commitment to vigorously defending our intellectual property and promoting fair competition,” says Johannes Schoiswohl, senior VP & head of Infineon’s GaN Systems business line.
Innoscience’s current products unaffected by Munich Court’s rulings
In response, Innoscience says that the Munich District Court rulings confirm that its currently marketed GaN power device products fall outside the scope of Infineon’s asserted German patents and may be commercialized in Germany without restriction.
The firm adds that these rulings are consistent with the final determination issued in May by the US International Trade Commission (ITC), which found that Innoscience’s current products do not infringe Infineon’s asserted US patent relating to packaging design (US Patent No. 9,899,481). The Munich case concerns the German counterparts of that same patent family. Innoscience says that the Munich Court found infringement only with respect to a limited set of legacy products — certain packaged 650–700V transistors — that had already been discontinued. So, Innoscience claims that any injunction granted would not apply to its current product portfolio, and there is hence no impact on its ongoing operations or customers’ use of its products in Germany.
The Munich Court ruling follows the Supreme People’s Court of China on 12 June issuing a final review decision in a patent infringement case brought by Innoscience, sustaining a sales injunction against Infineon, prohibiting it from selling its relevant GaN products within mainland China.
Innoscience says that, together, these rulings reaffirm the legality of its current product portfolio and its ability to operate freely in key global markets.
While proceedings in Germany remain ongoing, including Innoscience’s invalidity challenges to the asserted German patent, Innoscience claims that the growing body of decisions across China, the USA and Germany underscores that the global litigation campaign initiated by Infineon has not altered the competitive position of Innoscience’s core products. To the contrary, independent judicial findings across multiple jurisdictions have consistently validated the robustness of Innoscience’s technology, the firm adds.
Innoscience concludes that it remains committed to expanding its global footprint and delivering GaN solutions to customers worldwide in a fair and competitive marketplace.
China’s Supreme Court upholds injunction against Infineon, says Innoscience
ITC affirms initial determination that Innoscience infringed Infineon GaN patent
Munich District Court rules in favor of Infineon in patent-infringement case against Innoscience
