Washington thinks one of ASML's most advanced lithography machines may be sitting in China. ASML says that is not possible, has never been possible, and isn't possible now. Both sides are arguing about the wrong thing.
The accusation came from US Commerce Secretary Howard Lutnick, who raised it directly with ASML executives in meetings reported by Bloomberg. ASML's response was flat: it has never shipped an EUV system to China, and none are operating there. Senior US officials reportedly claim to hold evidence that EUV-related components and transport equipment did move to China, but they haven't shown it publicly.
On the physical facts, ASML has the easier case. An EUV machine is roughly the size of a school bus, weighs about 180 tonnes, gets built in small numbers, and needs constant servicing by ASML staff. You don't smuggle one. You don't run one in secret for long. ASML is also the only company on earth that builds them, which means every unit has a serial number and a paper trail back to Veldhoven.
So why is Lutnick pushing a claim that, on its face, sounds implausible? Because the machine isn't the point. The leverage is.
The MATCH Act is the real weapon
US lawmakers introduced the MATCH Act earlier this year. It would expand restrictions beyond EUV to cover deep ultraviolet lithography systems and their associated service mechanisms. That second half is what should make ASML's CFO sweat. The bill defines servicing broadly — installation, maintenance, remote software updates, technical support — and DUV immersion tools are a core part of ASML's product mix.
China has spent years buying every DUV tool it's allowed to buy, reportedly stockpiling in anticipation of exactly this kind of squeeze. Those tools are already installed. They are already running. They need updates and parts. Cut the servicing, and you're not just blocking new sales — you're degrading an installed base on a clock.
Bank of America ran the numbers. A full ban on immersion lithography tools and related services to China could cut ASML's revenue by roughly 14–15% and EBIT by 16–17% on a gross basis. That is not a rounding error. That is a strategic wound to the only company in the world that makes the machines the entire AI buildout depends on.
Shenzhen already changed the math
Here's the part Washington can't ignore even if it wants to. A Reuters investigation reported that Chinese engineers have activated an EUV prototype inside a secure facility in Shenzhen overseen by the Central Science and Technology Commission, built in part by former ASML engineers. Working prototype is not mass production. But it is a credible signal that the moat ASML enjoyed is no longer infinite.
Gary Ng at Natixis put the strategic logic plainly: the priority for mastering EUV in China will be defense. That reframes the whole export-control debate. The original US theory was that you could keep Beijing a generation behind by controlling the tools. If Beijing builds its own tools, even slowly, even badly at first, the clock on that theory runs out.
Which brings us back to Lutnick's accusation. It looks less like a discrete enforcement action and more like positioning. If you're about to push allies and a Dutch company into accepting a much harsher servicing regime, it helps to have a public narrative that the current rules are already being violated. Whether or not a machine is in China, the policy direction is set.
ASML is now caught between a customer base it can't fully serve, a regulator with leverage over its biggest product line, and a competitor that, until recently, wasn't supposed to exist. The next year will not be decided by where one EUV machine is. It will be decided by how broadly Washington defines the word "servicing" — and how quickly Shenzhen can turn a prototype into a production line.
The silicon curtain isn't coming. It's already being measured for installation.
