JSR Corporation — AI supply-chain exposure

JSR makes photoresists — the light-sensitive chemicals coated onto silicon wafers so circuit patterns can be projected and etched into them. It sits in the materials layer of the chain as a supplier of process chemicals to the foundries. Its most strategic products are EUV resists, the specialised formulations that leading-edge fabs need to print the finest features, and its reach extends across the resist and related-chemistry stack.

The structural hook is that photoresist is a consumable every advanced chip depends on, made by only a handful of mostly Japanese firms. Being taken private by a state-backed investor, Japan Investment Corporation, underscores how governments now treat resist supply as strategic infrastructure. The model places JSR mid-chain because it is a quiet chokepoint: small relative to the value of the chips it enables, but without it leading-edge lithography simply does not run, which is where its durable pricing power lives.