Infineon presents first functional power devices on 300mm SiC wafers - Semiconductor Today

Infineon's 300mm SiC power device demonstration is not a product announcement—it's a supply-chain power play. The 150mm-to-300mm jump quadruples usable die area per wafer, yet the binding constraint remains PVT crystal-growth thermodynamics: micropipe density and dislocation control at 8-inch scale are still unsolved at industry level. Infineon's choice to showcase 'functional devices' rather than declare volume production signals that yield has not yet crossed the commercial threshold. On supply-chain risk, Wolfspeed's 2024 financial collapse exposed the structural vulnerability of single-source US substrate dependency. Infineon's vertical-integration move is a defensive hedge—building capacity redundancy under the EU Chips framework while reducing upstream pricing leverage. Competitively, STMicroelectronics and Rohm will likely unveil 8-inch roadmaps within two quarters. The real wildcard, however, is China: Tianyue and SICC already command roughly 30% of the global 6-inch substrate market. The 8-inch technology window is closing in 18–24 months. Verdict: by H2 2026, 800V EV platforms will shift 300mm SiC from 'optional' to 'mandatory.' If per-die cost fails to drop another 40%, the IGBT-replacement thesis slips a full generation.