What functional devices on a 300 mm SiC wafer show, and what they do not

On 9 November 2026 Infineon said it had processed 300 mm silicon-carbide wafers into functional power devices at its fab in Villach, Austria. The company says this used existing silicon manufacturing equipment in a full-scale fab, and that it is the first such result in that kind of environment. A functional device means the process built a power device that Infineon could measure as working. It does not by itself state yield, a qualified process design kit, or a date when customers can order that process.

Infineon says the result shows that 300 mm SiC can move toward later industrialization. It also says the ramp timing will be planned with customers and partners, while the 200 mm SiC manufacturing roadmap continues. Those two sentences keep the milestone on the development side of volume production. Silicon Showcase has not listed a commercially available 300 mm SiC foundry process from this announcement.

The same release says a 300 mm wafer can hold 2.3 times as many chips as a 200 mm wafer. That is Infineon’s area comparison. It was not remeasured. Infineon separately says a Cold Split trial at its Dresden site showed a way to separate more wafers from a SiC boule. That trial is a materials step, not the Villach device result. Infineon plans to show a processed 300 mm SiC wafer at electronica in Munich from 10 to 13 November 2026. The Fabrication & Prototyping guide is the place to compare foundry access, a named process, and manufacturing equipment. This announcement is none of those three listings.

A working device on a development wafer answers a different question from a process a chip team can book, and from a power transistor a board team can buy.

Ask whether a customer can submit a design to the 300 mm SiC flow, and on what date. Ask what “functional” covered: which device, which test, and which yield. Ask how the Villach device lot relates to the Dresden Cold Split trial. Ask which products still come from the 200 mm SiC line. Silicon Showcase reviewed Infineon’s release on 9 November 2026. The release date is the same day.