Patent ID: 7419759

Claim:
A photoresist composition comprising a solvent mixture, a resin, a photo acid generator, and a quencher, the solvent mixture comprising a first solvent containing an ether compound and a second solvent having a polarity stronger than the first solvent, wherein an amount of the first solvent is in a range of about 61% to about 79% by weight based on a total weight of the solvent mixture, and an amount of the second solvent is in a range of about 21% to about 39% by weight based on the total weight of the solvent mixture, wherein the first solvent includes at least one selected from the group consisting of propylene glycol monomethyl ether (PGME) and propylene glycol monomethyl ether acetate (PGMEA), and wherein the second solvent includes at least one selected from the group consisting of cyclohexanone, ethyl lactate, methyl 2-hydroxybutyrate, heptanone, lactone.