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Infineon GaN products banned in China market
💡Supply chain alert: Infineon GaN chips are now banned in China, impacting AI hardware manufacturing.
⚡ 30-Second TL;DR
What Changed
Supreme People's Court upheld the preliminary injunction
Why It Matters
This ruling disrupts supply chains for power electronics and AI hardware components relying on GaN technology in China. Companies may need to pivot to alternative suppliers to avoid compliance risks.
What To Do Next
Audit your hardware supply chain for Infineon GaN components if your AI infrastructure or server products are manufactured or sold in China.
Who should care:Enterprise & Security Teams
Key Points
- •Supreme People's Court upheld the preliminary injunction
- •Ban covers sales, offers to sell, and imports of GaN products
- •Conclusion of a major cross-border semiconductor patent litigation
🧠 Deep Insight
Web-grounded analysis with 15 cited sources.
🔑 Enhanced Key Takeaways
- •The patent dispute involves Innoscience, a Chinese GaN semiconductor company, which successfully sued Infineon for infringement of two of its core GaN invention patents.
- •The initial ruling by the Suzhou Intermediate People's Court on May 27, 2026, found Infineon liable for infringement and ordered them to cease all infringing activities, including sales, offers to sell, and imports, while also awarding Innoscience 10 million RMB (approximately $1.38 million USD) in damages.
- •This Chinese ruling is part of a broader, multi-jurisdictional patent conflict between Infineon and Innoscience, where Infineon has secured favorable judgments against Innoscience in other regions, including an import ban in the US by the ITC and injunctions in Germany.
- •The two specific Innoscience patents involved in the Chinese lawsuit are ZL202311774650.7 and ZL202211387983.X, which relate to a GaN power device and its preparation method, and a nitride-based semiconductor device and its manufacturing method, respectively.
- •The Beijing Intellectual Property Court had previously confirmed the validity of Innoscience's two core GaN patents in April 2026, rejecting Infineon's invalidation claims, which paved the way for the infringement ruling.
🛠️ Technical Deep Dive
- Infineon's GaN products, such as the CoolGaN Transistors 650 V G5, are designed for high-voltage applications like USB-C adapters, chargers, lighting, data center rectifiers, renewable energy, and motor drives.
- The CoolGaN Transistors 650 V G5 offer improved figures of merit, including up to 50% lower energy stored in the output capacitance (Eoss), up to 60% improved drain-source charge (Qoss), and up to 60% lower gate charge (Qg) compared to previous generations and competitors.
- Infineon's GaN technology utilizes patented Island Technology® and GaNPX® packaging, which contribute to high current die, high yield, low inductance, and low thermal resistance in a small package.
- Key features of Infineon's GaN transistors include 650V enhancement mode, high switching frequency (>10MHz), fast and controllable fall and rise times, reverse conduction capability, and zero reverse recovery loss.
- Products like the CoolGaN Drive HB 600 V G5 integrate a half-bridge power stage with two 270 mΩ GaN switches and integrated high- and low-side gate drivers in a compact 6x8 mm TFLGA-27 package.
- Infineon's GaN solutions are based on a normally-off concept and are suitable for both hard and soft-switching applications, offering excellent efficiency and power density.
🔮 Future ImplicationsAI analysis grounded in cited sources
The ruling will likely lead to a significant shift in market share within China's GaN semiconductor market.
With Infineon's GaN products banned, domestic players like Innoscience are positioned to capture a larger share of the rapidly growing Chinese market for GaN devices, particularly in consumer electronics, data centers, and automotive applications.
Global semiconductor companies will face increased scrutiny and complexity regarding intellectual property enforcement in China.
This landmark decision by China's Supreme People's Court underscores China's assertive stance in IP litigation and its growing influence in shaping global patent disputes, necessitating more robust IP strategies for international firms.
The multi-jurisdictional patent disputes in the semiconductor industry, especially for critical technologies like GaN, will intensify.
The ongoing legal battles between Infineon and Innoscience across China, the US, and Germany demonstrate a trend of companies aggressively protecting their intellectual property in key technological areas, leading to more frequent and complex cross-border litigations.
⏳ Timeline
2024-11
Innoscience sued Infineon for patent infringement in China's Suzhou Intermediate People's Court.
2024-12
Suzhou Intermediate Court held its first hearing for the Innoscience vs. Infineon patent infringement case.
2025-05
Suzhou Intermediate Court held its second hearing for the Innoscience vs. Infineon patent infringement case.
2026-04
Beijing Intellectual Property Court confirmed the validity of Innoscience's two core GaN patents, rejecting Infineon's invalidation claims.
2026-05-07
The US International Trade Commission (ITC) ordered an import ban on Innoscience products into the US, finding infringement of an Infineon GaN patent.
2026-05-27
Suzhou Intermediate People's Court ruled that Infineon infringed two of Innoscience's GaN patents, ordering a cease of infringing activities and awarding 10 million RMB in damages.
2026-06-13
China's Supreme People's Court upheld the preliminary injunction, banning the sale and import of Infineon's relevant GaN products in mainland China.
📎 Sources (15)
Factual claims are grounded in the sources below. Forward-looking analysis is AI-generated interpretation.
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