Patent ID: 8877843

Claim:
A resin composition comprising: a copolymer comprising a first monomer containing a monomer unit having at least one carboxyl group and a second monomer copolymerizable with the first monomer; and an ultraviolet absorber, wherein, when the resin composition forms a resin film and when ∈1 represents an absorbance coefficient per unit weight of the resin film in a solution prepared by dissolving the resin film in a solvent, ∈1 at a light wavelength at which the resin film is to be irradiated is at least 0.01 (L/(g·cm)) and wherein the first monomer is at least an α,β-unsaturated carbonyl group-containing monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, fumaric acid, maleic acid, and ester compounds thereof.