China has started mass production of domestic immersion deep ultraviolet (DUV) lithography machines, a step that could reshape how its leading chipmakers navigate US-led export controls. A state-backed Shanghai company has begun building the tools, with first deliveries this year to Semiconductor Manufacturing International Corp. (SMIC), Hua Hong Semiconductor, and ChangXin Memory Technologies (CXMT), according to a report from The Information cited by Reuters. ASML shares fell more than 6.5% after the news broke.
A state-backed Shanghai supplier steps into the DUV gap
The manufacturer has not been publicly named due to political sensitivities. The Information linked the effort to Shanghai Yuliangsheng Technology and reported that SMIC tested a Yuliangsheng immersion DUV machine in 2025. Tom’s Hardware, citing the same reports, added that initial output is modest, around five systems in 2026 and roughly 20 units in 2027, suggesting a measured ramp with extended field validation still ahead.
While local officials and corporate stakeholders have long telegraphed ambitions to localize lithography, the pivot to actual volume builds marks a meaningful shift. It gives leading foundries and memory makers a domestic option for immersion DUV, the most advanced lithography class still broadly accessible to Chinese fabs after EUV shipments were effectively blocked. That access path has been central to China’s efforts to sustain process improvements under tightening Western controls, as EastFrontier has tracked in its lithography loophole analysis.
Why immersion DUV is the strategic hinge
Immersion DUV systems are workhorses for mainstream logic and memory production and can be pushed, via multi-patterning, into more advanced geometries. For China’s top fabs, securing a stable domestic supply is strategically critical, it is the tool class with the most immediate impact on yields, throughput, and cost structures across a wide span of nodes.
But closing the performance gap with ASML remains formidable. According to Reuters and The Information, the new Chinese systems lag on both performance and reliability and will require additional testing before true mass adoption. Metrics like numerical aperture, overlay accuracy, uptime, and defectivity, areas where ASML has refined its installed base over decades, will dictate how quickly local tools can be qualified for high-volume manufacturing. China is also pursuing a domestic EUV machine, but Reuters reported that effort remains at the prototype stage.
Deliveries align with national champions as Congress considers tighter curbs
The first slated recipients SMIC, Hua Hong, and CXMT are precisely the companies at the center of US debates about restricting advanced chipmaking in China. A bill moving through Congress would cut off ASML sales and servicing to these firms, a provision that survived even as the broader package was scaled back under industry pressure, as EastFrontier reported in its MATCH Act analysis.
If enacted, limits on servicing could be as consequential as fresh export bans. Modern immersion DUV tools require constant calibration, parts, and software updates. The specter of curtailed service contracts has already accelerated Beijing’s push to localize critical tool categories and spare parts. Against that backdrop, the timing of domestic deliveries is notable: CXMT began trading on Shanghai’s STAR Market on July 27 with an estimated $85 billion valuation, spotlighting the state’s continued mobilization around memory as a pillar of industrial policy. More on that story in today’s final article.
ASML’s moat endures — but the direction of travel is clear
ASML’s steep stock decline highlights how even small shifts in China’s tool autonomy reverberate globally. Still, the Dutch company retains a deep moat in immersion DUV performance, field reliability, and a global service organization built on thousands of tools and millions of field hours. “Mass production” in this Chinese context, five units in 2026 and around 20 in 2027, remains a fraction of annual immersion DUV output from established vendors.
The tools’ ultimate value will hinge on successful, sustained high-volume manufacturing at customer fabs. Field acceptance tests, line integration, maintenance maturity, and parts availability will all determine whether these systems can meaningfully displace foreign supply in the near term. Two milestones will signal real progress: first, a credible public report of sustained high-volume production at a named customer fab; second, a reduction in the performance gap with ASML tools on overlay and uptime metrics.
China has set its sights on 80% chip self-sufficiency by 2030. Domestic immersion DUV is a necessary, if not sufficient, condition for reaching that target. Today’s news is a step in that direction, but the distance remaining is still substantial.
The broader localization picture: DUV as one piece of a larger puzzle
Lithography is the most visible but not the only front in China’s chip tool localization effort. Etch, deposition, inspection, and metrology equipment are all subject to similar export control pressures, and Chinese companies are making varying degrees of progress across each category. The DUV announcement is significant precisely because lithography has historically been the hardest category to localize — it requires the most precise optics, the most sophisticated laser sources, and the most demanding systems integration of any tool class in the fab.
The fact that a Chinese company has reached mass production, however modest in initial volume, is a signal that the localization effort is progressing further than most Western analysts expected. It also changes the calculus for US policymakers: if China can produce its own immersion DUV tools, the case for restricting ASML’s service contracts (as the MATCH Act proposes) becomes weaker, because the primary effect would be to accelerate adoption of domestic alternatives rather than to slow China’s chip production.
For China’s AI industry, the DUV development is a long-term positive. The near-term constraint on AI compute is not lithography, it is the availability of advanced packaging, HBM memory, and the interconnect technologies that allow large GPU clusters to function efficiently. But as the AI buildout continues and demand for domestic chips grows, the ability to produce those chips at scale without dependence on foreign lithography tools will become increasingly important. Today’s announcement is a down payment on that capability, one that will take several years to fully mature, but that is now clearly underway.