Infineon said on Tuesday that it will invest around €1.1 billion in its existing cleanrooms at Villach, Austria, to build the first high-volume plant for gallium nitride power semiconductors on 300-millimetre wafers. Production is scheduled to start by the end of 2027. The money is spread out to 2034.
The European Commission has approved €319 million in Austrian state aid for the project under the European Chips Act. Austria's economics ministry says it will support the investment with up to that amount, subject to funding criteria, with the formal commitment still to be signed. Infineon's chief executive called it a commitment to Europe's semiconductor ecosystem; Austria's chancellor called it one of the largest single investments in the country's high-tech history.
The amount is not the interesting part. The wafer size is.
Why 300 millimetres changes the maths
Gallium nitride power devices have shipped on 200-millimetre wafers. A 300-millimetre wafer yields about 2.3 times as many chips of the same size, which is Infineon's own figure. More useful for the capital budget: 300 millimetres is the diameter Infineon's silicon lines in Villach already run at, so the €1.1 billion upgrades cleanrooms that exist rather than building a shell around new ones.
That is the difference between a first-of-a-kind process with a plausible payback and one that needs a decade of patience. Infineon processed its first 300-millimetre GaN wafers two years ago; what was announced this week is the transfer of that process into volume manufacturing. That it will be the world's first such plant is the company's claim, and no third party has confirmed how close its competitors are.
What the material is for
Gallium nitride switches electricity with lower losses than silicon and at higher frequency, which means smaller power supplies, less heat, and less waste between the wall socket and the chip. Infineon puts the demand in AI data centres, grid infrastructure, electric vehicles, robotics and consumer electronics.
Analysts expect the GaN power semiconductor market to reach roughly USD 3.5 billion by 2031, growing around 35 percent a year from 2025, according to the Yole Group forecast Infineon cites. That is a forecast, not an order book. Set against it, €1.1 billion of new capacity is a substantial share bet, and GaN devices already ship in volume from several suppliers. What is new here is the wafer size, not the material.
The aid comes from the first Chips Act
The €319 million is roughly 29 percent of the investment, approved by the Commission under the 2023 Chips Act. Chips Act 2.0, proposed in June 2026, is still being negotiated between member states and the European Parliament, so this decision is being taken under the earlier framework, before the current version of the argument about European chip capacity was written.
There is a gap in the timetable worth noting. Production starts by the end of 2027, but the money runs to 2034, and Infineon says only that ramp-up will be aligned with market demand. Capital spending paced to demand is prudent; it also means the volume actually built depends on customers who have not been named.
What is still unconfirmed
- How many wafers per month the plant will produce, and at what revenue expectation. Infineon has not published either.
- Which customers. None were named.
- How many jobs the new line adds. Infineon gives current headcount in Austria, around 5,800 people with about 4,800 at Villach, but not the increment.
- Whether €319 million is the final subsidy figure, or whether Austria's formal commitment matches the approval.
- Whether the plant is first in the world, as opposed to first at Infineon.
Europe's chip policy is usually judged on leading-edge logic, where it remains a spectator. Power semiconductors are the part of the stack where Europe already has a position, and a first-of-a-kind approval is a different kind of bet from a subsidy for capacity that would have been built anyway. Whether it counts as sovereignty depends on the number nobody published: wafers a month, at what price, for whom.
This post will be updated when Infineon publishes capacity figures or Austria signs the funding commitment.
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