China's DUV Lithography: Not an ASML Killer, But an Iteration Loop
demian_ai · x · 2026-07-31
Commenting on reports of China developing an immersion DUV lithography system, the author argues that calling it an "ASML killer" is an overstatement, yet dismissing it due to initial poor performance is equally misguided.
The core thesis is that the primary objective isn't attractive wafer economics immediately, but rather closing the loop between domestic tools, working fabs, and next-gen engineers. Every install generates failure data, trains service teams, qualifies component suppliers, and reveals which subsystem breaks first.
While export controls restrict access to equipment, this domestic program creates access to iteration. ASML's true advantage isn't a single brilliant schematic that can be copied, but the accumulated engineering experience and data feedback over time.
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