Patent ID: 10418521

Abstract:
A method of producing a patterned substrate includes the steps of: providing, on a substrate, a coating film of a resin composition including (A) an alkali-soluble resin selected from the group consisting of polyimides, polyamideimides, polyimide precursors, polyamideimide precursors, polybenzoxazoles, polybenzoxazole precursors, copolymers of at least two of the resins, and copolymers of at least one of the resins and another structural unit, (B) a photoacid generator, and (C) at least one compound selected from the group consisting of epoxy compounds and oxetane compounds; forming a pattern of the coating film; patterning the substrate through etching using the pattern of the coating film as a mask; and removing the coating film of the resin composition.