China Starts Mass Production of Domestic DUV Lithography Machines
A state-backed company headquartered in Shanghai has commenced mass production of China's first homegrown immersion deep ultraviolet (DUV) lithography machines, marking one of the most consequential milestones in Beijing's decade-long drive toward semiconductor self-sufficiency. The initial production batch stands at approximately five units, with deliveries to leading Chinese chipmakers scheduled for 2026. The development, first reported by Reuters, represents a direct and concrete response to successive rounds of Western export controls that have progressively restricted China's access to advanced chipmaking equipment.
The Manufacturer: Shanghai's State-Backed Yuliangsheng
The entity responsible for the breakthrough is Yuliangsheng, a Shanghai-based company operating under state backing and aligned with China's broader semiconductor industrial policy objectives. Yuliangsheng functions within the ecosystem of state-directed investment that Beijing has channeled into domestic chip equipment development, a strategic priority formalized through initiatives such as the "Big Fund" (National Integrated Circuit Industry Investment Fund). The company's mandate is explicitly to develop and commercialize lithography equipment that can substitute for imported tools — most critically, those supplied by the Dutch firm ASML Holding NV, which has held a near-global monopoly on advanced lithography systems.
Production Scale and Initial Output
The current production volume of approximately five immersion DUV units is modest by global industry standards, but its symbolic and strategic weight is substantial. Sources cited in Reuters reporting describe the output as the opening phase of a ramp-up trajectory, with the first machines due for delivery to domestic customers within 2026. The pace of subsequent production scaling will depend on yield performance, component supply chain stability, and customer qualification results — all of which remain subject to ongoing evaluation. Analysts note that even limited domestic availability of immersion DUV tools materially alters China's negotiating position with foreign suppliers and its vulnerability to further export restrictions.
Technical Specifications: What Immersion DUV Technology Delivers
Immersion DUV lithography machines are the workhorses of modern semiconductor fabrication. They use deep ultraviolet light — typically at a wavelength of 193 nanometers — projected through a liquid medium, usually ultra-pure water, interposed between the final lens element and the silicon wafer. This liquid immersion increases the effective numerical aperture of the optical system, enabling finer patterning resolution than is achievable with conventional dry DUV tools. The result is the ability to manufacture chips at process nodes down to approximately 28nm, and with multiple patterning techniques, somewhat beyond.
How Immersion DUV Differs from Dry DUV and EUV
Dry DUV lithography, which uses air rather than liquid between lens and wafer, is limited to process nodes of roughly 65nm and above, making it suitable for less complex, mature-node chips. Immersion DUV extends that capability significantly, supporting nodes from approximately 28nm down to around 14nm when combined with multi-patterning techniques, at a substantially lower cost per tool than extreme ultraviolet (EUV) systems. EUV lithography, ASML's most advanced product line, uses 13.5nm wavelength light and is essential for sub-7nm leading-edge nodes, but each machine costs in excess of $150 million and requires an entirely different optical and vacuum infrastructure. Immersion DUV machines, by contrast, are estimated to cost in the range of $50–80 million per unit for ASML's NXT series — a price point that China's domestic alternative would need to approach competitively to gain broad adoption.
Target Node: 28nm and Its Commercial Relevance
The 28nm node occupies a uniquely important position in the global semiconductor landscape. It is the process generation at which a vast range of commercially critical chips are manufactured: microcontrollers for automotive systems, power management integrated circuits, display drivers, industrial sensors, and a broad category of consumer electronics components. Global demand for 28nm-class chips has proven resilient and structurally durable, precisely because these applications do not require the bleeding-edge transistor density of smartphone processors or AI accelerators. For China specifically, domestic production capability at 28nm is strategically vital: it addresses the segment of the chip market most immediately affected by export controls, and it underpins the supply chains of Chinese automotive, industrial, and electronics manufacturers who cannot readily source equivalent chips from foreign fabs under current geopolitical conditions.
Key Customers: SMIC and China's Leading Chipmakers
The first immersion DUV machines produced by Yuliangsheng are expected to be delivered in 2026 to Semiconductor Manufacturing International Corp (SMIC), China's largest and most advanced contract chipmaker, as well as potentially to other leading domestic fabs. SMIC has already been reported to be testing the tools, a qualification process that typically involves running production wafers through the machine to assess patterning accuracy, overlay performance, and throughput consistency before committing to volume deployment.
SMIC's participation as a launch customer is strategically significant on multiple levels. The company operates at the frontier of what Chinese chipmaking can achieve under current equipment constraints, having demonstrated 7nm-class production using multi-patterning on existing DUV tools — a technically demanding workaround that underscores both the ingenuity and the limitations of China's current equipment base. Access to domestically produced immersion DUV tools would reduce SMIC's dependence on its existing ASML machine inventory, which cannot be replenished under current Dutch export licensing restrictions, and would provide a path to sustaining and expanding 28nm-class production capacity without foreign equipment approvals. Other potential customers include Hua Hong Semiconductor and additional state-affiliated fabs that collectively form the backbone of China's domestic chip supply chain.
Geopolitical Impact: Reducing Dependence on ASML and Western Suppliers
China's successful initiation of immersion DUV mass production directly challenges ASML's effective monopoly on lithography equipment and represents the most tangible evidence to date that Western export controls, while significantly constraining China's access to leading-edge tools, have simultaneously accelerated Beijing's investment in domestic alternatives. The strategic logic is straightforward: each successive round of restrictions has raised the cost of dependence on foreign suppliers, increasing the return on investment for homegrown development programs.
ASML's Exposure and Market Implications
ASML's financial exposure to the Chinese market is substantial. In its 2024 annual results, the company reported that China accounted for approximately 29% of total net system sales — a figure that had already declined from a peak of around 49% in 2023 as export licensing restrictions tightened. The immersion DUV segment, which includes ASML's NXT:2000i and related systems, represents a significant portion of that China-facing revenue. If Chinese chipmakers progressively substitute domestically produced immersion DUV tools for ASML equivalents — even partially and over a multi-year horizon — the revenue impact on ASML could be material. Analysts at several European investment banks have flagged China DUV substitution risk as a medium-term headwind for ASML's earnings, though most current models assume a gradual rather than abrupt displacement given the qualification timelines and volume constraints of nascent domestic production.
U.S. and Allied Export Controls: The Policy Backdrop
The policy environment that precipitated China's immersion DUV push has been constructed incrementally since 2018. The U.S. Department of Commerce's Entity List additions — most notably the designation of SMIC in December 2020 — restricted the supply of U.S.-origin equipment and components to key Chinese chipmakers. In 2023, the Dutch government, under U.S. diplomatic pressure, revoked ASML's export licenses for its most advanced DUV systems, specifically the NXT:2000i series, effectively prohibiting new shipments of immersion DUV tools to China. Japan subsequently imposed parallel restrictions on its own semiconductor equipment exporters. These measures, taken together, created a hard ceiling on China's ability to expand its immersion DUV installed base through conventional commercial channels — and, in doing so, provided the strategic imperative for accelerated domestic development programs such as Yuliangsheng's.
Outlook: Challenges, Limitations, and the Road to Advanced Nodes
Despite the undeniable significance of Yuliangsheng's production milestone, a sober assessment of China's homegrown DUV program requires acknowledging the substantial challenges that remain. An initial batch of approximately five units is orders of magnitude below the production volumes required to meaningfully supply China's chipmaking industry at scale. ASML ships hundreds of DUV systems annually; closing that gap will require years of manufacturing ramp-up, sustained capital investment, and resolution of complex supply chain dependencies.
Yield performance — the proportion of chips produced that meet specification — is a critical unknown. Lithography machines must achieve extraordinarily precise overlay accuracy, measured in single-digit nanometers, consistently across millions of wafer exposures. Whether Yuliangsheng's tools can match the overlay and throughput specifications of ASML's established NXT series remains to be demonstrated at production scale. Precision optics represent a particular vulnerability: the lens systems used in immersion DUV machines require optical glass of exceptional purity and homogeneity, historically sourced from a small number of specialized suppliers in Germany and Japan. China's domestic optics industry has made progress in this area, but the extent to which Yuliangsheng's supply chain is fully indigenized — or still dependent on foreign components — has not been publicly confirmed.
Furthermore, the gap between 28nm DUV capability and the sub-5nm nodes required for leading-edge logic and high-bandwidth memory chips remains vast. EUV lithography, which is essential for those advanced nodes, is a technology that China has not yet demonstrated any credible path to replicating domestically in the near term. ASML's EUV monopoly, reinforced by export controls that have never permitted a single EUV shipment to China, continues to define the upper boundary of what Chinese fabs can achieve regardless of DUV progress.
Nevertheless, the commencement of immersion DUV mass production in Shanghai constitutes a genuine inflection point. It demonstrates that China's semiconductor equipment industry has crossed a threshold from laboratory demonstration to — however limited — commercial production. The trajectory from this point will be closely monitored by policymakers, investors, and industry participants worldwide as a leading indicator of how effectively technology decoupling can be sustained over the medium and long term.
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