Export controls move upstream

The chip fight between Washington and Beijing has moved one step backward in the supply chain. For the past few years, the headline restrictions were about the most advanced chips and the machines used to make them. Now a bipartisan group in Congress wants to go after the less glamorous tools behind a much larger share of chip production: deep ultraviolet lithography systems, etching gear, and the service work that keeps those machines running. The bill is called the MATCH Act, and it was introduced in the House on April 2 with a Senate companion backed by Sens. Pete Ricketts and Andy Kim (baumgartner.house.gov, nbcnews.com). That shift matters because China was already locked out of the very top tier. ASML has never shipped its EUV lithography systems to China, so the new proposal is aimed at the next rung down: DUV tools, especially immersion DUV machines that can still produce a wide range of commercially useful chips. Those are older than EUV, but they are not obsolete. They sit in the middle of modern semiconductor manufacturing, which is exactly why lawmakers targeted them (cnbc.com, federalregister.gov). The bill is not just about sales. It would also restrict maintenance, upgrades, and technical support for major Chinese chip firms. That is a more serious move than it sounds. Chipmaking tools are not appliances you plug in and forget. They need constant calibration, replacement parts, software updates, and engineers who know how to keep yields from collapsing. A ban on service can turn an installed machine base into a slow-motion write-off, which is one reason the proposal landed so hard in European markets (digitaltoday.co.kr, bloomberg.com). ASML was the obvious target, and investors understood that immediately. Its shares fell on April 7 after CNBC reported on the proposal and its implications for China sales. The company had already warned that China would shrink from 33% of net system sales in 2025 to about 20% in 2026. Even before this bill, that business was heading down. The point of the MATCH Act is to push it down further by closing off one of the last places where China could still buy world-class foreign equipment at scale (cnbc.com, asml.com). Congress is acting because the earlier export regime left a hole big enough to drive a fab through. Since 2018, the United States has steadily tightened controls on advanced semiconductors and some manufacturing equipment, with major rules in October 2022 and October 2023. But those controls were uneven across countries and product categories. A Congressional Research Service report published in September 2025 said plainly that some parts of the semiconductor supply chain remained open to China even after the newer rules. The House Select Committee on China has argued that Chinese firms used those gaps to keep buying chipmaking equipment despite the broader crackdown (congress.gov, chinaselectcommittee.house.gov). That is why the bill keeps talking about allies. The United States does not make every critical tool itself. ASML is Dutch. Tokyo Electron is Japanese. If Washington wants to choke off China’s access to manufacturing gear, it has to bring the Netherlands and Japan along or pressure them into parallel rules. That is the real meaning of “move upstream.” The fight is no longer just over the chips that come out of the fab. It is over who gets to sell the machines, who gets to fix them, and whether an engineer in Veldhoven or Tokyo is still allowed to answer the phone when a tool inside a Chinese fab goes down (bloomberg.com, baumgartner.house.gov).