What are GaN chips and why are they critical for AI?

GaN chips (gallium nitride-based) offer superior energy efficiency and switching speeds compared to silicon alternatives. They are essential for modern AI systems, including Nvidia servers, as they reduce energy loss and enable smaller component sizes.

How will the ban impact Infineon?

Infineon loses access to China, its largest market accounting for 38% of revenue. This could intensify competition from Innoscience and local manufacturers, particularly in high-performance AI solutions.

How is the patent dispute between Infineon and Innoscience evolving?

The dispute spans multiple regions: Innoscience won in China, Infineon in the U.S. (with a ban on competitor imports), while litigation continues in Germany. Both companies are vigorously defending their technologies and market positions.

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Hardware

China's Supreme Court Bans Infineon from Selling GaN Chips in Country

June 16, 2026

Photo: Tom's Hardware

Quick answer

China's Supreme Court banned Infineon from selling GaN chips in the country after ruling in favor of Innoscience in a patent dispute.

China's Supreme Court upheld a ban on the sale, offer, and import of Infineon's GaN chips within the country. The decision follows a patent dispute with Chinese firm Innoscience, which accused the German manufacturer of infringing two patents. Infineon is also required to pay a fine of 10 million yuan (approximately $1.48 million).

Both companies are approved suppliers for Nvidia's AI server power systems operating at 800V. GaN technology reduces energy loss and component sizes, which is critical for high-performance computing systems. Innoscience leads the global GaN chip market with a 29.9% share in 2024, while Infineon holds the fourth position at 10.3%.

The patent conflict extends beyond China. In May, the U.S. International Trade Commission (ITC) ruled Innoscience violated Infineon's patents and banned imports of its products, though the Chinese company claims its updated solutions bypass the restrictions. Litigation in Germany continues, with a 2025 ruling favoring Infineon.

The Chinese court's decision boosted Innoscience's stock by 16.6% and positively impacted Chinese semiconductor manufacturers. Analysts suggest the ban could strengthen local companies' positions in energy-efficient AI and data center solutions.

Common questions

What are GaN chips and why are they critical for AI?: GaN chips (gallium nitride-based) offer superior energy efficiency and switching speeds compared to silicon alternatives. They are essential for modern AI systems, including Nvidia servers, as they reduce energy loss and enable smaller component sizes.
How will the ban impact Infineon?: Infineon loses access to China, its largest market accounting for 38% of revenue. This could intensify competition from Innoscience and local manufacturers, particularly in high-performance AI solutions.
How is the patent dispute between Infineon and Innoscience evolving?: The dispute spans multiple regions: Innoscience won in China, Infineon in the U.S. (with a ban on competitor imports), while litigation continues in Germany. Both companies are vigorously defending their technologies and market positions.

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