Report: China stockpiled 343 immersion DUV chipmaking tools

The Centre for Technology & Statecraft says China has accumulated 343 immersion deep-ultraviolet lithography tools used for advanced chipmaking. It calls for banning exports of all immersion DUV tools to China, echoing the MATCH Act proposed by US legislators.

Why it matters: Immersion DUV, used with multi-patterning, is how China can make near-leading-edge AI chips without EUV machines, so a large stockpile blunts the effect of export controls. It raises pressure for broader tool bans, alongside the recent arrest over alleged Nvidia chip smuggling.