Patent ID: 7078148

Claim:
A radiation-sensitive resin composition comprising: (A) a resin comprising a hydroxyl group or carboxyl group, of which the hydrogen atom has been replaced by an acid-dissociable group possessing an alkali dissolution controlling capability, wherein the acid-dissociable group dissociates by the action of an acid generated by irradiation and increases the solubility of the resin in an alkaline aqueous solution and (B) a photoacid generator, which comprises a compound (B-1) shown by the following formula (1), wherein the groups R 1 individually represent a hydrogen atom or a linear or branched alkyl group having 1–4 carbon atoms, n is 0 or 1, R 2 and R 3 individually represents a hydrogen atom, a linear or branched alkyl group having 1–4 carbon atoms, or R 2 and R 3 bond together with the sulfur atom in the formula to form a 3–6 member cyclic structure, and X − represents a disulfonylimide acid anion represented by the following formula (i), wherein each R 4 groups individually represent a linear or branched fluoroalkyl group having 1–15 carbon atoms, and a compound (B-2) shown by the following formula (2), wherein the groups R 5 individually represent a hydrogen atom, a hydroxyl group or a derivative thereof, or a linear or branched alkyl group having 1–4 carbon atoms and Y − represents a substituted or unsubstituted, linear or branched fluoroalkyl sulfonic acid anion having 2–15 carbon atoms.