Patent ID: 7713677

Claim:
A photoresist composition used in a display device, comprising: an alkali-soluble phenol polymer in an amount of 10 to 70 parts by weight, including at least one unit of Formula 1; a photo-acid generator in an amount of 0.5 to 10 parts by weight; a dissolution inhibitor in an amount of 5 to 50 parts by weight, including at least one unit of Formula 2; and a solvent in an amount of 10 to 90 parts by weight, wherein the amounts of the foregoing components is based on a total of 100 parts by weight of alkali-soluble phenol polymer, photo-acid generator, dissolution inhibitor, and solvent; wherein R is a methyl group, wherein at least one of R 1 , R 2 and R 3 is a t-butyl vinyl ether protective group.