Patent ID: 8530146

Claim:
A method for forming a resist pattern, comprising: using a radiation-sensitive resin composition, a developer that includes an organic solvent in an amount of 80 mass % or more, and an ArF excimer laser beam as an exposure light, the radiation-sensitive resin composition comprising: (A) an acid-labile group-containing polymer; (B) a radiation-sensitive acid generator; and (D) an acid diffusion controller, wherein the acid diffusion controller (D) is at least one compound selected from the group consisting of a hydroxy group-containing tri(cyclo)alkylamine, an amide group-containing compound and a photodegradable base, and wherein a solubility of the radiation-sensitive resin composition to the organic solvent decreases upon the exposure to the ArF excimer laser, and a contrast value γ calculated from a resist dissolution contrast curve obtained by changing only a dose of the ArF excimer laser is 5.0 to 30.0.