China’s Gallium Oxide Leap
Chinese researchers are advancing gallium oxide semiconductors in ways that analysts say could leave U.S. F‑22 radar systems “two generations behind,” a claim that underlines accelerating military-electronics competition reported. The development signals strategic risk for U.S. avionics and highlights how materials breakthroughs can rapidly shift capability gaps.
A Science Advances [paper published]science.org on Feb. 11, 2026, lists Wei Ren et al. (with coauthors including Zhenping Wu) and reports robust room‑temperature ferroelectricity in the κ‑phase of Ga2O3. orcid.org The [experiments demonstrated]science.org that epitaxial κ‑Ga2O3 grown by MOCVD shows stable polarization while retaining ultra‑wide‑bandgap power‑device properties, enabling the same crystal to act as a high‑voltage transmitter and nonvolatile memory; team lead Wu described this multifunction integration in an email cited by SCMP on Mar. 3, 2026. science.org China’s strategic control of gallium — export licensing announced in July 2023 and a December 2024 U.S‑targeted ban — has tightened downstream access, with CSIS estimating China supplies about 98% of primary gallium, and U.S. watchdog reporting the F‑35 Block‑4 radar modernization slipped to at least 2031 (roughly five years late). usitc.gov Concurrent moves to scale Ga2O3 include Hon Hai Research Institute’s joint work with National Yang Ming Chiao Tung University on higher‑voltage Ga2O3 devices reported in 2024 and parallel theoretical studies (npj Computational Materials / arXiv) modeling κ‑Ga2O3 domain behavior, giving multiple institutional paths to translate the Science Advances result into producible radar and guidance electronics. nycu.edu.tw
