Patent ID: 7202014

Claim:
A stimulus-sensitive composition comprising a compound that generates one of an acid and a radical by external stimulation, the compound being represented by formula (I′): wherein Y represents an aryl group, an alkyl group, a cycloalkyl group, an alkenyl group, a —C(═O)—Y 3a group or a —Y 3b —C(═O)—Y 3c group, wherein Y 3a and Y 3c each represents an alkyl group, a cycloalkyl group, an aryl group, an alkenyl group, an alkoxy group, an aryloxy group, a hydroxyl group, a —NR 3 R 4 group, a —NHC(═O)—R 3 group or a —NHSO 2 R 3 group, wherein R 3 and R 4 each independently represents a hydrogen atom, an alkyl group or a cycloalkyl group, and Y 3b represents a divalent linking group resulting from removal of one hydrogen atom from the Y 3a , R 1 ′ and R 2 ′ each independently represents a hydrogen atom, an alkyl group or a cycloalkyl group, Y 3 and Y 4 each independently represents an alkyl group or a cycloalkyl group, X − represents a non-nucleophilic anion, m represents 0 or 1, and n represents 1 or 2, provided that m+n=2.