Patent ID: 9128376
Filing Date: 2015-09-08
Classification: C08F,G03F,H01L

Abstract:
1. A pattern forming method comprising: (i) forming a film using an actinic ray-sensitive or radiation-sensitive resin composition containing a resin (A) having a repeating unit having a group generating a polar group upon being decomposed by the action of an acid, and a repeating unit having an aromatic group, a compound (B) generating an acid upon irradiation with actinic rays or radiation, and a solvent (C); (ii) exposing the film; and (iii) developing the exposed film using a developer including an organic solvent to form a negative tone pattern, wherein the repeating unit having an aromatic group is a repeating unit represented by the following general formula (II): wherein, in general formula (II), R X represents a single bond or a divalent linking group, Ar represents an unsubstituted naphthyl group, a naphthyl group having at least one of substituent selected from the group consisting of a linear or branched alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, a halogen atom, a cyano group, an amino group and a nitro group, a biphenyl group, an anthryl group, a fluorenone structure, an anthrone structure, a xanthone structure, a thioxanthone structure, a vinyl benzene structure or a diphenyl sulfone structure, and R