Patent ID: 8273521

Claim:
A radiation-sensitive resin composition comprising: (A) a compound shown by a formula (1); (B) a resin protected by an acid-dissociable group and being insoluble or scarcely soluble in alkali, the resin becoming alkali-soluble upon dissociation of the acid-dissociable group; and (C) a photoacid generator, wherein R 1 represents a hydrocarbon group having 1 to 20 carbon atoms and R 2 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms, or R 1 and R 2 are such that R 1 and R 2 together with a nitrogen atom form a heterocyclic structure having 4 to 20 carbon atoms if R 1 and R 2 bond with each other via the nitrogen atom, wherein R 3 represents a monovalent acid-dissociable group, n is an integer from 1 to 6, wherein each of R 4A , R 4B , and R 4C represents one of an alkyl group having 1 to 4 carbon atoms and a monovalent alicyclic hydrocarbon group having 4 to 20 carbon atoms, or R 4A represents one of an alkyl group having 1 to 4 carbon atoms and a monovalent alicyclic hydrocarbon group having 4 to 20 carbon atoms and R 4B and R 4C are such that R 4B and R 4C together with a carbon atom form a divalent alicyclic hydrocarbon group having 4 to 20 carbon atoms if R 4B and R 4C bond with each other via the carbon atom, and wherein R 3 in the formula (1) comprises a group shown by formula (I-1), wherein X represents an oxygen atom or a sulfur atom, each of R 5 and R 6 represents one of a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and an alkoxy group having 1 to 20 carbon atoms, and R 7 represents one of an alkyl group having 1 to 20 carbon atoms, an alkoxyalkyl group having 2 to 20 carbon atoms, an alicyclic hydrocarbon hydrocarbon group having 3 to 20 carbon atoms, an aryl group having 6 to 18 carbon atoms, and an aralkyl group having 7 to 19 carbon atoms.