Patent ID: 8329380

Claim:
A positive photosensitive resin composition comprising at least: (A) a resin containing a constituent unit represented by following formula (1) having an acid-dissociable group, and a constituent unit having a functional group capable of reacting with a carboxyl group to form a covalent bond, the resin being alkali-insoluble or sparingly alkali-soluble and becoming alkali-soluble when the acid-dissociable group dissociates; and (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation: wherein R 1 represents a hydrogen atom, a methyl group, a halogen atom or a cyano group; each of R 2 and R 3 independently represents a hydrogen atom, a linear or branched alkyl group, or a cycloalkyl group, provided that at least one of R 2 and R 3 represents a linear or branched alkyl group or a cycloalkyl group; R 4 represents a linear or branched alkyl group that may be substituted, a cycloalkyl group that may be substituted, or an aralkyl group that may be substituted; and R 2 or R 3 may combine with R 4 to form a cyclic ether, wherein the constituent unit having a functional group capable of reacting with a carboxyl group to form a covalent bond is a constituent unit having an oxetane group or a constituent unit which is formed using a radical polymerizable monomer represented by following formula (4): wherein X represents a divalent organic group; R 7 represents a hydrogen atom, a methyl group or a halogen atom; each of R 11 and R 12 independently represents a hydrogen atom or an alkyl group; and n is an integer of 1 to 10.