Patent ID: 6902862

Claim:
A negative type resist composition comprising: (A1) a compound generating a sulfonic acid upon irradiation with actinic rays or a radiation and having a partial structure represented by the following formula (1) and a counter anion, (A2) a compound generating a sulfonic acid upon irradiation with actinic rays or a radiation and having a partial structure represented by the following formula (I), (II), or (III) and a counter anion, (B) an alkali-soluble resin, and (C) a crosslinking agent capable of carrying out an addition reaction with the alkali-soluble resin which is the component (B) by the action of an acid, wherein the counter anion in the component (A1) differs from the counter anion in the component (A2): wherein X represents a sulfur atom or an iodine atom, provided that the X's may be the same or different, R 1a and R 2a each independently represents an alkyl group or an aryl group, provided that when two or more R 1a 's are present, they may be the same or different, that when two or more R 2a 's are present, they may be the same or different, R 1a and R 2a , R 1a and A, R 1a and B, R 2a and A, or R 2a and B may be bonded to each other to form a ring, A and B each independently represents a hydrocarbon structure connecting X + 's, provided that at least one pair of X + 's connected by A or B has a structure in which the X's connected are present in the same conjugated system, and that when two or more A's are present, they may be the same or different, l represents 0 or 1, provided that when X is a sulfur atom, l represents 1, and that when X is an iodine atom, l represents 0, m represents an integer of 0 to 10 and n represents an integer of 1 to 6, provided that when m is 0, n represents an integer of 2 or larger: wherein R 1 to R 37 each independently represents a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group, a halogen atom, or an —S—R 38 group, wherein R 38 represents an alkyl group or an aryl group, provided that two or more of R 1 to R 15 , two or more of R 16 to R 27 , or two or more of R 28 to R 37 may be bonded to each other to form a ring containing one or more members selected from a single bond, a carbon atom, an oxygen atom, a sulfur atom, and a nitrogen atom.