Patent ID: 7090960

Claim:
A negative resist composition comprising: (A) an alkali-soluble polymer; (B) a cross-linking agent that forms a cross-link between the alkali-soluble polymers (A) by the action of an acid; (C) an acid generator that is represented by the following formula (I) and is capable of generating an acid upon irradiation with one of an actinic ray and a radiation; and (D) a nitrogen-containing basic compound: wherein R 1 to R 5 , which are the same or different, each represents a hydrogen atom, a nitro group, a halogen atom, an alkyl group, an alkoxy group, an alkyloxycarbonyl group, an aryl group or an acylamino group; at least two of R 1 to R 5 may be combined with each other to form a cyclic structure; R 6 and R 7 , which are the same or different, each represents a hydrogen atom, a cyano group, an alkyl group or an aryl group; Y 1 and Y 2 , which are the same or different, each represents an alkyl group or an alkenyl group, with proviso that, when both Y 1 and Y 2 are alkyl groups, at least one of the alkyl groups represented by Y 1 and Y 2 has one of a hydroxyl group, an ether linkage group and a sulfide linkage group, or the alkyl groups represented by Y 1 and Y 2 each contains at least two carbon atoms; Y 1 and Y 2 may be combined with each other to form a ring together with S + ; at least one of R 1 to R 5 and at least one of Y 1 and Y 2 may be combined with each other to form a ring; at least one of R 1 to R 5 and at least one of R 6 and R 7 may be combined with each other to form a ring; at least two of the compounds represented by formula (I) may combine with each other via a linkage group at the site of any one of R 1 to R 7 , Y 1 and Y 2 to form a dimer or more; and X − represents a non-nucleophilic anion, which further comprises an acid generator other than the acid generator (C) represented by formula (I), capable of generating an acid upon irradiation with actinic rays or radiation.