Patent ID: 9557643
Date: 2017-01-31
CPC Classifications: G03F

Claim:
1. A pattern forming method comprising: (1) a step of forming a film by using an actinic ray-sensitive or radiation-sensitive resin composition containing (A) a resin containing an acid-decomposable repeating unit and being capable of decreasing the solubility for an organic solvent-containing developer by the action of an acid, (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation, (C) a compound capable of decomposing by the action of an acid to generate an acid, and (D) a solvent, (2) a step of exposing the film by using an actinic ray or radiation, and (4) a step of developing the exposed film by using an organic solvent-containing developer to form a negative pattern, wherein the content of the resin (A) is from 40 to 79 mass % based on the total solids content of the resin composition, the content of the compound (C) is from 2.7 to 11.6 mass % based on the total solids content of the composition, and the acid generated from the compound (C) is a sulfonic acid or a methide acid.