Patent ID: 7195863
Filing Date: 2007-03-27
Classification: G03F,H01L

Abstract:
1. 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 where the salt is selected from ammonium salts, tetramethylammonium salts or C 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.