On the evening of June 12, 2026, Innoscience, a leading domestic gallium nitride (GaN) manufacturer, announced via its official WeChat public account that the Supreme People’s Court had formally issued a ruling on the reconsideration of the preliminary injunction, upholding the sales ban against Infineon handed down by the Suzhou Intermediate People’s Court. The ruling prohibits the sale of Infineon’s relevant GaN products within Chinese territory, marking Innoscience’s final victory in the patent infringement litigation.
Back in early 2025, Innoscience filed a lawsuit with the Suzhou Intermediate People’s Court of Jiangsu Province, alleging that Infineon Technologies (China) Co., Ltd., Infineon Technologies (Wuxi) Co., Ltd., and its distributor Suzhou Xinwoke Electronic Technology Co., Ltd. had infringed two core invention patents covering gallium nitride technology owned by Innoscience.
The two patents (Patent Nos. 202311774650.7 and 202211387983.X) relate to gallium nitride power devices and their fabrication methods, representing key technological achievements of Innoscience in the third-generation semiconductor sector.
On May 27, 2026, the Suzhou Intermediate People’s Court issued its first-instance judgment, confirming Infineon’s infringement. The court ordered Infineon to immediately cease all infringing acts including sale, offer for sale and import of the disputed products, and ordered the company to pay a total of RMB 10 million to Innoscience as compensation for economic losses, with the judgment taking immediate effect.
Dissatisfied with the ruling, Infineon filed a reconsideration application with the Supreme People’s Court.
It is worth noting that while the infringement litigation proceeded, Infineon launched a counterattack through a separate legal channel by filing a request with the China National Intellectual Property Administration (CNIPA) to invalidate Innoscience’s two core patents.
On November 19, 2025, the CNIPA issued a decision fully upholding the validity of both of Innoscience’s invention patents. Infineon subsequently filed an administrative lawsuit with the Beijing Intellectual Property Court.
In April 2026, the Beijing Intellectual Property Court handed down a judgment fully dismissing all of Infineon’s claims, judicially affirming the validity of Innoscience’s two GaN patents.
The ruling from the Beijing Intellectual Property Court removed a critical barrier for Innoscience’s subsequent infringement litigation, as valid patent rights serve as the prerequisite for any finding of infringement.
Based on this foundation, the Supreme People’s Court issued its formal reconsideration ruling on the preliminary injunction on June 12, 2026, rejecting all of Infineon’s reconsideration requests and sustaining the injunction issued by the Suzhou Intermediate People’s Court.
Industry analysts believe the final ruling by the Supreme People’s Court carries far-reaching implications. China ranks among Infineon’s most important markets worldwide, and the sales ban on its GaN products will deal a substantial blow to its domestic GaN business. For Innoscience, the victory constitutes not only a major legal breakthrough but also paves the way for further expansion of its domestic market share and reinforces its leading position in the global gallium nitride power device industry.
For the broader sector, the case sends a clear signal that China’s judicial system is strengthening protection for domestic enterprises’ independent intellectual property rights, and that leveraging patents as a competitive tool is not an exclusive privilege of multinational giants.
It should be noted that the patent dispute between Innoscience and Infineon extends beyond China, with parallel litigations ongoing in the United States and Germany.
In May 2026, the full commission of the U.S. International Trade Commission (ITC) issued its final determination affirming its preliminary ruling issued in December 2025, which found Innoscience liable for infringing one of Infineon’s GaN technology patents and issued an import and sales ban targeting Innoscience. Nevertheless, the ITC also confirmed that Innoscience’s current GaN power device products do not infringe Infineon’s relevant patents and may continue to be imported and sold in the U.S. without restrictions.
(Reprinted from https://news.eccn.com/）