The United States is pressing ASML, the Dutch chip-equipment giant, over concerns that one of its most advanced machines may have ended up in China in violation of export restrictions.
According to Bloomberg, citing sources, US Commerce Secretary Howard Lutnick questioned ASML's leaders about worries that China acquired one of the company's EUV machines. Such a sale would breach the US-led export controls designed to keep the most cutting-edge chipmaking tools out of Chinese hands.
Bloomberg reports that this scrutiny represents ASML's biggest challenge yet under the Trump administration. ASML is the world's dominant supplier of EUV (extreme ultraviolet) lithography systems — the room-sized machines used to print the smallest, most powerful computer chips. No other company makes them, which is exactly why governments treat access to them as a strategic lever.
For years, Washington has worked with allies, including the Netherlands, to block China from obtaining this technology, fearing it could advance Beijing's military and AI capabilities. If a machine slipped through, it would mark a notable gap in those controls.
The details reported so far are limited to the concerns raised and the questioning of ASML's leadership; the source does not establish that a violation has been confirmed.
Why it matters: EUV machines sit at the chokepoint of the global chip race, so any sign that one reached China tests whether US-led export restrictions are actually holding.