abstract |
A curable resin composition excellent in alkali developability, curability, heat resistance, and insulation reliability is provided. The curable resin composition of the present invention contains a carboxyl group-containing photosensitive resin, a photopolymerization initiator, and a thermosetting compound. The carboxyl group-containing photosensitive resin contains a radical polymerizable polymer. The radical polymerizable polymer is a monomer having a base unit polymer, a structural unit derived from a maleimide monomer, a structural unit derived from an unsaturated carboxylic acid monomer having no ester bond, and a hydroxyl group. It contains a structural unit derived from a body as an essential unit, and has a structure obtained by reacting a monomer having a functional group capable of reacting with the carboxyl group to the carboxyl group of the polymer as the base polymer. [Selection figure] None |