The U.S. government recently expressed serious concerns to Dutch semiconductor equipment giant ASML that its top-tier EUV lithography machine may have been diverted to China, escalating the ongoing tech rivalry despite ASML's firm denials.
This concern did not arise in a vacuum, of course. It's the latest development in a long-running effort by Washington to limit China's access to advanced semiconductor technology, which began with comprehensive export controls in late 2023. These rules aimed to prevent China from using advanced chips for military purposes.
So, what changed the game? The first major trigger was a December 2025 report that China had secretly built a prototype EUV-class tool. While not ready for mass production, this news fueled fears in Washington that existing, entity-based restrictions were porous and that sensitive technology was leaking through loopholes.
Second, this suspicion prompted U.S. lawmakers to act. In early 2026, they introduced the MATCH Act, a bill designed to close these perceived gaps. Its key objective was to shift from blacklisting specific companies to imposing country-wide restrictions, especially on DUV immersion tools—a slightly older but still critical technology that China was purchasing in large quantities from ASML.
That brings us to the current situation. The U.S. Commerce Secretary's direct communication with ASML signifies a new level of pressure. The focus has broadened beyond just EUV. Now, even if ASML has perfectly complied with EUV export bans, Washington is scrutinizing the entire support ecosystem, including the sale and maintenance of DUV equipment. The fear is that expertise gained from servicing DUV tools could indirectly help China advance its own lithography ambitions.
The financial stakes are high. ASML has stated that China is expected to account for about 20% of its sales in 2026, which could translate to over €7 billion in revenue. A sweeping ban on DUV sales and services would not only be a significant blow to ASML's bottom line but could also create serious diplomatic friction between the U.S. and the Netherlands. For now, the market seems more focused on the powerful AI-driven demand for chips, but this geopolitical risk is a critical variable to watch.
- EUV (Extreme Ultraviolet) Lithography: The most advanced and complex technology used to print circuits on the world's most powerful microchips. ASML is the sole manufacturer of these machines.
- DUV (Deep Ultraviolet) Lithography: A less advanced, but still highly sophisticated, generation of chip-making technology. It is used to produce a vast range of mature and specialized semiconductors.
- ASML: A Dutch company that is the world's leading manufacturer of semiconductor lithography equipment, holding a monopoly on EUV technology.