Langdao Silex Shows an EUV Light Source Prototype, Says Mass Production Is Three to Five Years Away - Pandaily

Langdao Silex's EUV light source prototype matters less for the 'China built it' narrative and more for its position on the technology maturity curve. The light source accounts for over 30% of an EUV system's cost and is its most energy-intensive module—exciting tin-droplet plasma to 13.5 nm demands extreme power density and beam stability. A prototype signals the fundamental physics is solved, but production-grade reliability (uptime above 90%), beam uniformity, and optical-path coupling precision still require years of engineering iteration. The 3-to-5-year window mirrors Cymer's own prototype-to-volume timeline, confirming no shortcut was taken. Upstream, high-power laser suppliers, precision collector optics, and tin-droplet generators will see early order traction. Downstream, the light source is merely the heart; without a matching projection objective, dual workpiece stage, and mask system, no production line emerges. The critical variable: once the light source is domestically secured, the number of chokepoints in the EUV chain collapses from many to few, sharply lowering integration difficulty. ASML's likely response is accelerating High-NA EUV commercialization to widen the generational gap. Over the next 12-24 months, expect multiple thermal-cycle and beam-quality validation rounds plus joint light-source-to-optics integration testing with domestic scanner makers. Before 2026 the market structure holds; after 2028, if volume production materializes, ASML's monopoly premium faces structural erosion.