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JSR Corporation is a Japan-based specialty-chemicals company and the world's largest photoresist manufacturer, holding an estimated ~27% share of the global semiconductor photoresist market.
Named counterparties identified by open-source research and written only where a primary source states the relationship — never inferred from sector or co-mention. 1 customer-side. This is a partial view: it covers the relationships we could evidence, not the company's full supply base.
JSR's Inpria subsidiary is co-developing metal-oxide resist (MOR) with SK hynix for next-generation DRAM patterning; in qualification/ramp, not yet disclosed as full commercial-volume shipment. No share_pct disclosed.
Scope. Absence of a counterparty here is not evidence that none exists — most commercial sourcing is confidential and never becomes public. Rows without a share figure mean no share was disclosed, not that the relationship is small.
Every exposure is read as a buyer dependency; the top 2 are its binding chokepoints.
No actions in the register have named or swept this company in the last 24 months.