Patent ID: 8808965

Claim:
A pattern forming method comprising: (i) a step of forming a film from a chemical amplification resist composition, (ii) a step of exposing the film, and (iii) a step of developing the exposed film by using an organic solvent-containing developer, wherein the chemical amplification resist composition contains: (A) a resin containing a repeating unit having 2 to 4 hydroxyl groups, (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation, (C) a crosslinking agent, and (D) a solvent, and wherein the crosslinking agent contains at least one of a phenol compound, an epoxy compound or a compound having two or more partial structures represented by the following formula CLNM-1: wherein, in the formula CLNM-1, R NM1 represents a hydrogen atom, an alkyl group, a cycloalkyl group or an oxoalkyl group.