Patent ID: 8911930

Claim:
A method of forming a pattern, comprising the step of applying an actinic-ray- or radiation-sensitive resin composition on a substrate so as to form a film, the step of selectively exposing the film through a mask and the step of developing the exposed film with the use of a developer containing an organic solvent, wherein the actinic-ray- or radiation-sensitive resin composition contains a resin (A) whose polarity is increased by the action of an acid so that the solubility of the resin in the developer containing an organic solvent is decreased, a photoacid generator (B) that when exposed to actinic rays or radiation, generates an acid containing a fluorine atom and having a cyclic structure in its molecule, and a solvent (C), and wherein the photoacid generator (B) is contained in the composition in a ratio of 8 to 20 mass % based on the total solids of the composition, wherein the photoacid generator (B) has a structure expressed by formula (ZI) wherein each of R 201 , R 202 and R 203 independently represents an organic group, wherein Z − is each of Xf independently represents a fluorine atom or an alkyl group substituted with at least one fluorine atom, each of R 1 and R 2 independently represents a member selected from among a hydrogen atom, a fluorine atom, an alkyl group and an alkyl group substituted with at least one fluorine atom, and when two or more R 1 s or R 2 s are contained, the two or more may be identical to or different from each other, L represents any one of a single bond, —COO—, —OCO—, and —CO—, and A represents an alicyclic group or a group with a nonaromatic heterocyclic structure, x is an integer of 1 to 20; y is an integer of 0 to 10 and z is an integer of 0 to 10.