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Samsung Tests Domestic EUV Mask Blanks in 4nm Foundry Production Line
What happened
Samsung Electronics is testing S&S Tech's EUV blank masks in its 4nm mass production line for the first time, aiming to reduce reliance on Japanese supplier Hoya. This strategic localization effort follows previous supply disruptions in Japan and involves high-value components. The move signals a shift in the EUV supply chain landscape but requires further validation.
Impact and signal
Low impactImpact score: 25/100
Affected components and suppliers
EUV blank masks
localizationsupply chainEUVmask blanks
Source and time
Source: The Elec · 4/16/2026 · View original source
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