Patent ID: 7514203

Claim:
A positive photoresist composition, comprising: 3 to 50% by weights of a binder resin selected from the group consisting of a resin having the structure of a Chemical Formula 1, a resin having the structure of a Chemical Formula 2, and their mixture; 2 to 40% by weights of a photoactive compound; and 10 to 94% by weights of an organic solvent: wherein the Chemical Formula 1 has the structure: wherein, R 1 , R 2 and R 3 are each independently H or methyl, R 4 is an alkyl or cycloalkyl group having 1 to 10 carbon atoms which contains an epoxy group, and x and y represent a mole ratio of the repeating units, wherein x is 0.02 to 0.80 and y is 0.20 to 0.98, provided that the binder resin of said Chemical Formula 1 may be a random copolymer which is not limited to a given order of the repeating unit; and wherein the Chemical Formula 2 has the structure: wherein, R 5 , R 6 , R 7 and R 9 are each independently H or methyl; R 8 is an alkyl or cycloalkyl group having 1 to 10 carbon atoms which contains an epoxy group; R 10 is at least one selected from the group consisting of carboxylic acid, alkoxycarbonyl and aromatic compound which have 1 to 14 carbon atoms; l, m and n are each a mole ratio of the repeating units, wherein l is 0.02 to 0.70, m is 0.05 to 0.60, and n is 0.01 to 0.60, provided that the binder resin of said Chemical Formula 2 may be a random copolymer which is not limited to a given order of the repeating unit.