Infineon Shows World's First 300mm SiC Power Wafer: 2.3x More Chips Than 200mm (November 10, 2026)

Event overview ​

On November 9, 2026, Infineon Technologies AG issued a press release from Munich and Villach, Austria, saying it had successfully processed 300mm silicon carbide wafers into functional power devices at its Villach fab. Infineon calls this the first time a company has demonstrated the milestone in a full-scale semiconductor manufacturing environment, and says the result was achieved by using existing silicon (Si) manufacturing equipment.

From November 10 to 13, Infineon is showing the processed 300mm SiC wafer to the public at electronica in Munich, Hall C3, Booth 502. The company frames the result as a technology milestone: it demonstrates that 300mm SiC is feasible on existing production equipment and lays a foundation for long-term supply to automotive, renewable-energy, industrial and AI data center customers.

The distinction between "shown" and "in volume production" matters. Infineon exhibited the first wafer processed into devices, not a product shipping in volume. The company says the timing and pace of a 300mm SiC ramp will be decided with customers and partners, while it continues to execute its 200mm SiC manufacturing roadmap.

Key facts ​

The 300mm arithmetic: where 2.3x comes from ​

Moving a wafer from 200mm to 300mm increases area quadratically. By pure geometry, a 300mm wafer has 2.25 times the area of a 200mm wafer. Infineon's figure of 2.3 times more chips is slightly above the area ratio; the difference reflects layout, usable edge area and how the figure is counted, and Infineon did not break it down. The number describes chips per wafer, not yield and not cost per chip.

For SiC power semiconductors, which are built on silicon carbide substrates, a larger wafer spreads the fixed cost of substrate, epitaxy and manufacturing across more devices. Infineon describes 300mm processing as technologically more advanced and significantly more efficient than 200mm, and calls the result a step from the lab into a manufacturing environment.

But 2.3 times more chips does not mean a 2.3 times lower unit cost. Yield, substrate defect density, device consistency and customer qualification all affect final cost. Infineon has not published 300mm SiC yield, device parameter distribution or cost per wafer, so the unit-cost reduction cannot be calculated. This site does not estimate it.

From "feasible in the lab" to "in volume production" ​

What Infineon showed is a working power device, not a mature product shipping in volume. The key words in the release are "feasibility" and "full-scale manufacturing environment": the first means the process path works, the second means it is not a single lab demonstration. Neither equals volume production.

Three public inputs are still missing. First, ramp timing: the company says only that it will be decided with customers and partners, with no year, quarter or capacity target. Second, yield and reliability: the release does not disclose 300mm SiC device yield, long-term reliability data or automotive qualification progress. Third, customer adoption: no first customers, vehicle programs or data center projects were named.

Infineon is keeping its 200mm SiC roadmap. That parallel approach makes 300mm a long-term platform rather than an immediate replacement. For customers, current SiC products still come mainly from 200mm lines; the value of 300mm appears only after a volume ramp.

Why SiC is being re-framed for AI data centers ​

Infineon lists the applications for SiC as traction inverters for electric vehicles, on-board chargers, EV charging stations, large-scale energy storage, industrial drives and uninterruptible power supplies. These applications share high voltage, high temperature and high-power conversion, where SiC's lower losses and higher power density translate into efficiency and thermal benefits.

The release also names new demand from AI data centers: solid-state transformers (SST), circuit breakers and power supply units (PSU). As AI rack power density rises, data center power delivery moves from the room level toward the rack level, raising requirements for high-voltage conversion efficiency and power density. Infineon says its CoolSiC portfolio addresses these applications.

Facts and judgments need to be separated. Infineon states that AI data centers are a new growth area for SiC and names SST, breakers and PSU as specific directions. The pace of SiC adoption in data center power delivery depends on rack power, power architecture and cost; Infineon has not published market size or customer data, and this site offers no quantitative forecast.

Cold Split and the 200mm roadmap ​

Infineon also proved the feasibility of its Cold Split technology for 300mm SiC at its Dresden site. Cold Split separates wafers from a SiC boule with less material loss and substantially shorter processing time than conventional wire sawing, so more wafers come from the same crystal and part of the capital expenditure is avoided.

The relationship between Cold Split and 300mm is upstream slicing plus downstream manufacturing: 300mm increases chips per wafer, while Cold Split increases wafers per boule. Together they spread the substrate cost of SiC. Infineon says the two developments position it to scale SiC technology in line with market demand.

Cold Split is also at the feasibility stage for 300mm. Infineon has not disclosed yield, wafer thickness, commercialization timing or line-conversion investment, so it cannot be treated as a production process already in place.

Impact and limits ​

First, the SiC size race has entered the 300mm stage. Infineon says it is the first company to process 300mm SiC devices in a full-scale fab. That "first" is the company's own claim; independent verification and competitors' progress require separate checks. The confirmed fact is that Infineon processed the wafer in Villach and exhibited it publicly.

Second, supply security and the cost curve are long-term variables. More chips per 300mm wafer can ease SiC supply constraints and spread manufacturing cost, but the actual effect depends on yield ramp, substrate supply and customer qualification. Infineon has not given a volume timeline, so the impact on market pricing cannot be calculated now.

Third, AI data centers have become a new SiC narrative. Infineon names SST, breakers and PSU as new applications but does not disclose specific customers, project scale or revenue contribution. For readers following AI infrastructure, the confirmed fact is that Infineon is extending SiC into data center power delivery, not that SiC has already replaced silicon devices at scale in AI data centers.

Fourth, 200mm remains the near-term workhorse. Infineon continues its 200mm SiC roadmap, which makes 300mm a medium- to long-term platform. For buyers, SiC devices available in the near term still come from 200mm lines; sampling, qualification and supply timing for 300mm products are undisclosed.

The limits are clear: Infineon has not published 300mm SiC volume timing, yield, device specifications, pricing or customer names. "World's first" and "2.3x more chips" are company statements. This site reports only what the official material discloses and does not estimate undisclosed capacity or cost.

Official sources ​

• Infineon official press release (OTS original, German): Infineon erzielt technologischen Meilenstein mit weltweit erstem 300-Millimeter-Siliziumkarbid-(SiC)-Wafer
• Semiconductor for You: Infineon marks innovation milestone with world's first 300-millimeter power silicon carbide (SiC) wafer
• Infineon electronica 2026 event page