Patent ID: 7195863

Claim:
A process for forming a resist pattern which includes: a step of forming a positive-working chemically amplified photoresist coating on a substrate having a diameter of 8 inches or more by application; a step of applying a composition for reducing development defects on the chemically amplified photoresist coating prior to exposure step; a step of baking after at least either the step of forming the chemically amplified photoresist coating by application or the step of applying the composition for reducing development defects; a step of selectively exposing the chemically amplified photoresist coating after forming the chemically amplified photoresist coating and applying the composition for reducing development defects; a step of post-exposure baking the chemically amplified photoresist coating; and a step of developing the chemically amplified photoresist coating, said composition for reducing development defects comprises an acidic composition of pH 1.5 to 4.5 containing a surfactant and where the film thickness of the chemically amplified photoresist coating after development is reduced in the range of 10 Å to 500 Å in comparison with the case of not applying the composition for reducing development defects, wherein said surfactant comprises an admixture of an organic acid and a salt and/or base, where the acid is selected from C 4 to C 15 perfluoroalkylcarboxylic acids, C 4 to C 10 perfluoroalkylsulfonic acids, and perfluoroadipic acid, where the salt is selected from ammonium salts, tetramethylammonium salts or C 1 to C 4 alkanolamine salts of C 4 to C 15 perfluoroalkylcarboxylic acids and C 4 to C 10 perfluoroalkylsulfonic acids, and the quaternary ammonium salts of perfluoroadipic acid, and, where the base is selected from an aqueous solution of ammonia and an aqueous solution of an amine; and, further where the said organic acid and the salt is at a ratio of 3:4–1:6, or the organic acid and the base is at a ratio of 7:4–7:6, both in molar ratio.