[Sci-Tech NOW] UNIST boosts sensitivity of next-generation EUV photoresist design - DongA Science

The UNIST study on tin-based EUV photoresists represents a meaningful step in extending extreme ultraviolet lithography beyond its current performance envelope. The key insight—that ligand chemistry, ... Read original →

The UNIST tin-based EUV resist work is not a sensitivity increment—it's a paradigm shift. By showing ligand architecture, not tin loading, governs the sensitivity-precision trade-off, the research collapses the molecular-weight × acid-diffusion design space Japanese suppliers optimized for two decades into a third axis: supramolecular assembly. Technical cascade: Ligand engineering as an independent tuning knob rewrites ASML's high-NA EUV calibration logic. Below 2 nm, the LER-versus-sensitivity conflict becomes a ligand swap on one molecular skeleton rather than a binary formulation choice. Multi-patterning compresses; TSMC and Samsung 2 nm PDK cycles could shorten 15-20%. Market: JSR, TOK, Shin-Etsu hold 90%+ EUV resist share, their moat a patent thicket on acid generators. Korea industrializing ligand chemistry opens a parallel track. D3 Jubilee Partners' entry signals commercialization, not academia. Risk: BIS controls don't yet cover ligand-engineering routes. Once Korea builds independent supply, tin precursors enter Entity List review within 12 months. For TSMC in Taiwan, China, a non-Japanese resist source is tangible redundancy. Forecast: Pre-2026 high-NA volume, two+ Korean startups close Series A and enter foundry qualification. JSR files ligand-engineering patents by Q3 2025—absorbing, not contesting.