China Cracks DUV Lithography: What It Means for ASML, AMAT, LRCX, and KLAC

On Monday, ASML erased early gains of more than 2% and dragged U.S. semiconductor equipment peers Applied Materials (AMAT), Lam Research (LRCX), and KLA Corp (KLAC) lower following a breaking report by The Information. The report revealed that a Shanghai-based, state-backed company has successfully begun mass-producing homegrown immersion deep ultraviolet (DUV) lithography machines — the first time any Chinese company has achieved this in production volumes.

The development team behind this milestone was assembled from across multiple Chinese firms, including state-backed startup Shanghai Yuliangsheng Technology. The significance of this cannot be overstated: DUV immersion lithography is the workhorse technology used to manufacture the vast majority of chips sold in the world today — from automotive semiconductors and industrial controllers to the memory chips inside your phone. ASML has held what amounted to a global monopoly on these systems for years. That monopoly now has its first credible crack.

What Is Immersion DUV Lithography — And Why Does It Matter?

Lithography is the process of printing circuit patterns onto silicon wafers using light. The finer the pattern, the more transistors you can pack onto a chip, and the more powerful and efficient that chip becomes. Deep ultraviolet (DUV) lithography uses light at 193 nanometre wavelengths to etch these patterns. The "immersion" variant — which passes that light through a water layer between the lens and the wafer — achieves higher resolution than dry DUV, enabling the production of chips at nodes from 90nm down to approximately 7nm when combined with multiple patterning techniques.

Immersion DUV is not cutting-edge in the way that EUV (extreme ultraviolet) is — ASML's EUV machines, which cost over $200 million each and require 100,000 parts, are essential for the most advanced 3nm and 2nm nodes used in chips like Apple's A-series and Nvidia's Blackwell GPUs. But immersion DUV is the backbone of global chip production. It is used to manufacture the overwhelming majority of chips by volume — automotive chips, industrial controllers, 28nm and 14nm logic, DRAM, NAND flash, and large portions of the advanced node process steps that EUV does not handle alone.

China's semiconductor industry has been cut off from ASML's DUV systems since the Dutch government, under U.S. pressure, restricted exports of immersion DUV machines to China in early 2023. China still has existing ASML machines installed in fabs, but it cannot get new ones — and it cannot get parts and service support under the new controls. The ability to produce domestic DUV machines would fundamentally change China's position in global semiconductor manufacturing.

What China Has Actually Achieved

According to The Information's report, the Shanghai-based company has moved beyond prototype and laboratory demonstration — it has entered mass production of immersion DUV lithography systems. This distinction matters enormously. Producing a single working prototype in a lab is orders of magnitude easier than building these machines at scale with the yield, consistency, and reliability that chip fabs require. A lithography machine that cannot deliver consistent overlay accuracy across thousands of wafers per month is not a production tool — it is an experiment.

The company reportedly assembled its development teams by drawing talent from multiple Chinese firms, including Shanghai Yuliangsheng Technology, a state-backed startup that had been working on lithography subsystems. This consolidation of expertise — drawing on engineers who had worked on different components of the lithography stack across multiple organisations — mirrors the approach China has taken in other strategic technology programs: pool dispersed capability, fund it heavily with state capital, and accelerate toward a single national champion.

What This Means for ASML

ASML's business has two distinct segments: EUV machines for the leading edge, and DUV machines for the mainstream. The DUV business — while less glamorous than EUV — generates substantial revenue. In 2024, DUV system revenue accounted for a significant portion of ASML's total bookings, particularly from customers in China who were rushing to place orders before export controls tightened further.

China was, until the export controls took effect, one of ASML's largest markets by revenue. Chinese customers accounted for approximately 29% of ASML's net system sales in 2023. The export controls have already sharply reduced ASML's China DUV revenue. A domestic Chinese DUV machine that can substitute — even partially — for ASML's systems would further erode the potential for any future resumption of that business. It also creates a precedent: if China can produce working immersion DUV machines, it will only improve the technology over time.

The more important long-term question is whether Chinese domestic lithography can eventually threaten ASML's EUV business in third markets — Japan, South Korea, Taiwan, Europe, and the United States. That threat is not present today. But it cannot be ruled out over a 10–15 year horizon if China's semiconductor equipment investment continues at its current trajectory.

Why AMAT, LRCX, and KLAC Fell With ASML

Applied Materials, Lam Research, and KLA Corp do not make lithography machines — that is ASML's domain. They make the other equipment that chip fabs need: deposition equipment (Applied Materials, Lam Research), etch equipment (Lam Research), and process control and inspection equipment (KLA Corp). So why did they sell off on this news?

The answer is investor sentiment about China exposure. All three companies have significant China revenue that has already been constrained by U.S. export controls. The market's reaction reflects a broader fear: if China is successfully developing lithography domestically, what other semiconductor equipment might it develop next? Applied Materials, Lam Research, and KLA all face similar political risk — their equipment is subject to export control restrictions, and the news of a Chinese DUV breakthrough raises the spectre of China accelerating domestic development across the entire equipment stack.

There is also a second-order effect: if China gains access to more capable domestic lithography, it can produce more advanced chips domestically, potentially reducing demand from Chinese fabs for the etch, deposition, and inspection equipment that AMAT, LRCX, and KLAC sell. A self-sufficient Chinese semiconductor ecosystem — even a partially self-sufficient one — is structurally negative for all Western semiconductor equipment companies.

How Credible Is This Breakthrough?

The honest answer is: we do not yet know the full capability of what China has produced. Immersion DUV lithography involves extraordinary engineering precision — overlay accuracy at single-digit nanometre levels, vibration isolation, ultra-pure optics, and laser light sources that must operate with extraordinary stability. ASML spent decades and billions of euros perfecting these systems. A Chinese machine entering mass production does not necessarily mean a machine that matches ASML's resolution, throughput, or reliability.

What matters for assessing the threat is not whether the Chinese machine is as good as an ASML NXT system today — it almost certainly is not. What matters is whether it is good enough to be useful in Chinese fabs producing mature-node chips (28nm and above), and whether it can be improved over time. The history of technology suggests that once a country achieves a working production system, the gap narrows faster than incumbents expect.

China has already demonstrated this pattern in other areas of semiconductor manufacturing. SMIC, China's leading foundry, achieved 7nm production using DUV multi-patterning — a result that surprised the industry. CXMT, the Chinese DRAM maker, has grown to significant scale faster than most Western analysts projected. Pattern recognition here matters: China's semiconductor industry is behind, but it is moving faster than consensus assumes.

The Export Control Escalation Risk

This development will almost certainly accelerate the U.S.-led effort to further tighten export controls on semiconductor equipment. The logic of export controls is straightforward: restrict China's access to the tools it needs to build advanced chips. But controls only work if China cannot domestically develop the restricted tools. Once China can produce its own immersion DUV machines, the controls that prevented it from importing ASML DUV systems lose much of their force.

The U.S. response is likely to be one of two things — or both. First, tighten controls on the components and subsystems that go into DUV machines: light sources, optics, vibration control systems, metrology equipment. If China is assembling its DUV machines using Western components (as appears to be the case with some Chinese equipment efforts), restricting those components would impede further development. Second, accelerate investment in next-generation EUV technology and other tools that keep the Western lead at the bleeding edge, even as China narrows the gap at mature nodes.

Bull and Bear Case for Semiconductor Equipment Stocks

What Should Investors Do?

The sell-off in ASML and U.S. equipment peers is a rational first reaction to news that changes the long-term competitive landscape. But it is worth separating the immediate market noise from the structural reality. ASML's EUV franchise — the part of the business that earns the highest margins and serves the most advanced fabs in the world — is not threatened by a Chinese immersion DUV machine. Taiwan Semiconductor, Samsung, and Intel are not going to buy Chinese lithography equipment. They are buying ASML EUV systems and will continue to do so for the foreseeable future.

For Applied Materials, Lam Research, and KLA Corp, the sell-off reflects sentiment contagion more than a direct fundamental threat. These companies' revenues are driven by investment cycles at leading-edge fabs globally — the AI capex boom that is driving record semiconductor investment in the United States, Japan, and Europe. A Chinese DUV machine does not change the capital expenditure plans of TSMC, Samsung, or the CHIPS Act-funded fabs rising in Arizona and Ohio.

The more important question for long-term investors is whether China's domestic equipment industry — if it continues to advance at its current pace — could eventually threaten Western equipment makers in third markets. That is a 10-year question, not a 10-month one. For now, the AI infrastructure build-out remains the dominant driver for semiconductor equipment demand, and that driver is intact.

Our view: the sell-off in AMAT, LRCX, and KLAC is likely an overreaction driven by sentiment. ASML faces a more nuanced long-term question around its mature-node DUV business, but its EUV-driven earnings trajectory is unchanged. Investors with a 2–3 year horizon who have been waiting for an entry point in quality semiconductor equipment names have one today.