China’s buying spree in ASML DUV gear prompts US calls for total export ban - South China Morning Post

China's aggressive DUV procurement is rational window-period arbitrage, not panic buying. The strategic logic: lock in 28nm+ capacity before the Netherlands tightens export controls under US pressure. Technical cascade: DUV underpins roughly 70% of global chip output—automotive MCUs, industrial controllers, IoT silicon. A hard cutoff hits the mature-node supply chain harder than any advanced-fab disruption. ASML's upstream partners (Zeiss optics, Trumpf excimer lasers) face an order cliff. Compliance calculus: ~25% of ASML revenue flows from mainland China, yet the legal authority to amend export controls sits in The Hague, not Washington. That jurisdictional gap is ASML's compliance arbitrage space. A total ban will almost certainly materialize as tiered restrictions, mirroring the incremental tightening pattern of the October 2022 entity list. Competitive response: Nikon and Canon cannot absorb displaced demand at scale. The real wildcard is SMEE—stricter controls will trigger more aggressive state-fund allocation toward domestic lithography. 12-24 month trajectory: Chinese fabs will accelerate multi-patterning and chiplet packaging to stretch DUV process limits. ASML will pivot strategic weight toward High-NA EUV, leaving its DUV line structurally squeezed as compliance overhead erodes mature-node margins.