Signal Navitas sues Renesas over GaN power semiconductor patent infringement

Summary

US next-generation power semiconductor company Navitas Semiconductor filed a patent infringement lawsuit against Japan's Renesas Electronics. The suit was filed in the US District Court for the Eastern District of Texas. The filing date was August 11 2026. Navitas alleges that Renesas's flagship gallium nitride power semiconductor line, marketed as SuperGaN, infringes four of its core GaN patents without authorization. The lawsuit reflects intensifying patent competition in the GaN power semiconductor market as demand grows for higher-efficiency power electronics. The two companies compete directly in the GaN power semiconductor space.