TL;DR
The US claims ASML’s advanced EUV lithography machines may be in China, raising concerns over export controls. ASML denies any machines are there. The situation remains unresolved, with government evidence undisclosed.
The US government has publicly alleged that ASML’s most advanced EUV lithography machines may be in China, a claim the Dutch chipmaker strongly denies. This ongoing tension is part of broader US-China competition over technological supremacy. This dispute centers on concerns over potential breaches of export controls designed to restrict China’s access to cutting-edge chip manufacturing technology. The allegations have significant implications for global supply chains and national security, given ASML’s monopoly on EUV technology.
According to Bloomberg, US Commerce Secretary Howard Lutnick has conveyed to senior ASML executives that there is evidence suggesting one of the Dutch company’s EUV systems may be in China. The US government has declined to publicly disclose this evidence, and ASML has responded by asserting that no such machine exists in China, nor has it ever been there.
ASML CEO Christophe Fouquet emphasized that the company tracks all shipped machines and maintains strict internal controls, including firewalls that prevent Chinese staff from accessing sensitive EUV technology. Fouquet also highlighted that the company’s EUV machines are built from decades of prior knowledge, making reverse engineering or unauthorized replication highly unlikely. The company currently sells older DUV tools to China, but these are explicitly framed as a commercial decision, not a loophole to bypass export restrictions.
While the US’s allegations have raised alarms, the government has not presented publicly available evidence, and ASML’s position remains that its technology has not been transferred illegally. The Department of Commerce has not responded to inquiries about whether it has concrete evidence of an EUV machine in China. The controversy is further complicated by ongoing legislative efforts in Congress to tighten export controls, including a proposed ban on all DUV sales to China, which could impact ASML’s revenue.
Implications for Global Tech Security and Supply Chains
This dispute underscores the strategic importance of ASML’s EUV technology, which is essential for manufacturing the most advanced semiconductors. If proven that EUV machines are in China, it could represent a major breach of export controls, potentially enabling China to accelerate its chip capabilities and challenge US-led technology dominance. The outcome could influence international trade policies, supply chain resilience, and national security strategies.
For consumers and industry players, the case highlights the fragility of the global semiconductor ecosystem, where a single company’s technology holds significant geopolitical weight. The dispute also raises questions about the effectiveness of current export controls and enforcement mechanisms in preventing the transfer of critical technology.

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Background on ASML and US-China Tech Tensions
ASML, a Dutch company, is the sole manufacturer of EUV lithography machines, which are vital for producing the most advanced chips used in AI, smartphones, and data centers. Its monopoly status has made it a focal point in US efforts to restrict China’s access to cutting-edge semiconductor technology, especially since the Trump administration imposed export bans in 2019.
While ASML sells older DUV tools to China, its EUV systems have been tightly controlled due to their strategic importance. The US has repeatedly accused China of attempting to acquire these systems through various means, though evidence has not been publicly disclosed. The current controversy emerged after US officials suggested that some EUV equipment might be in China, despite ASML’s denials.
This ongoing tension is part of broader US-China competition over technological supremacy, with semiconductor technology at the core of national security and economic leadership.
“We have evidence suggesting that ASML’s EUV systems may have been shipped to China, which would be a serious breach of export controls.”
— Howard Lutnick, US Commerce Secretary

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Unconfirmed Evidence and Ongoing Investigations
The US government has not publicly disclosed the evidence supporting its claim that EUV machines are in China. It remains unclear whether any such equipment has been shipped or is operational there. ASML continues to deny the allegations, and no independent verification has been provided. The Department of Commerce has declined to comment on whether it possesses concrete proof, leaving the situation unresolved.

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Next Steps in US-China Semiconductor Dispute
The US government may further investigate the allegations and potentially escalate to legal or diplomatic actions if evidence emerges. Congress is considering legislation that would tighten export restrictions, which could impact ASML’s sales and operations. Meanwhile, ASML is expected to continue monitoring its shipments and defending its compliance. The company and government officials will likely remain in close contact as the investigation unfolds.

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Key Questions
What evidence does the US claim to have that suggests EUV machines are in China?
The US has not publicly disclosed specific evidence; officials have only indicated that they possess intelligence suggesting shipments to China. The details remain classified.
Has ASML ever sold EUV machines to China?
No. ASML has not sold EUV systems to China. The company states that all EUV machines are tracked and that none are in China.
Could the US allegations be mistaken or based on false information?
It is possible. The US has not released concrete evidence, and ASML denies the claims. The situation is still under investigation.
What are the potential consequences if EUV machines are found in China?
It could lead to violations of export controls, possible sanctions, and a reassessment of US-China technology restrictions, impacting global supply chains and geopolitical relations.
How might this affect ASML’s business?
If the allegations lead to increased restrictions, ASML could face reduced sales to China and potential legal challenges, affecting its revenue and monopoly status.
Source: TechCrunch