Infineon says it processed functional power devices on 300mm SiC wafers

Infineon's Villach fab validating functional power devices on 300mm SiC wafers is not an incremental size upgrade—it is a structural reset of the SiC cost curve. Moving from 150mm to 300mm multiplies die output per wafer by roughly 4x. Once yield matures, cost-per-amp drops into the 1.2-to-1.5x range of silicon, pulling the economic crossover for 800V EV traction inverters forward by 18 to 24 months. The competitive read is sharper than the headline. STMicroelectronics' Sicralys platform remains anchored to 200mm. Wolfspeed is mired in financial restructuring. Chinese device makers—BYD Semi, StarPower, Sanan—have volume lines concentrated at 150 to 200mm. By leaping directly to 300mm, Infineon is engineering a generational capital penalty: latecomers must either match the capex or absorb a two-to-three-year cost disadvantage across equipment, substrate specs, and design tooling. The real 12-to-24-month variable sits upstream. Whether Wolfspeed, Coherent, or SK Siltron can deliver production-grade 300mm SiC substrates by 2026 determines whether this becomes an industry-wide retooling or a single-player showcase. If substrate supply lags, 300mm stays a trade-show artifact. If it scales, SiC power-device BOM costs will breach the Si IGBT premium threshold by 2027, making material substitution in EV powertrains irreversible.