a substance that reacts to light, especially one that is used in the process of making electronic circuits (= closed systems through which an electric current can flow)

Silicon chips are manufactured by shining light on silicon that has been coated with photoresist. 硅芯片是通过对涂有光刻胶的硅进行光照而制造的。

The company supplies photoresists for printed circuit boards.

They are hoping to form a technical partnership with a photoresist supplier.