53  US 9,323,153 B2  54  In one embodiment, a resin (Ab) preferably include at least  a repeating unit represented by the following formula as a  repeating unit represented by the general formula (A).  -continued  The content of repeating unit represented by the general  formula (A) in the resin (Ab) is preferably from Oto 90% by  mole, more preferably from 5 to 80% by mole, still more  preferably from 10 to 70% by mole, and particularly prefer› ably from 20 to 60% by mole, based on all the repeating units  in the resin (Ab).  In one embodiment, the resin (Ab) may contain a repeating  unit (B) including a structural moiety capable of decompos› ing by irradiation with actinic rays or radiation to generate an  acid (hereinafter referred to as an "acid-generating repeating  unit (B )" or a "repeating unit (B )").  The structural moiety may be, for example, a structural  moiety capable of decomposing by irradiation with actinic  rays or radiation to generate an acid anion in the repeating unit  (B), or a structural moiety capable of discharging an acid  anion to generate a cation structure in the repeating unit (B).  Furthermore, this structural moiety is preferably, for 35  example, an ionic structural moiety including a sulfonium salt  structure or an iodonium salt structure.  This structural moiety may be, for example, the same struc› tural moiety as a structural moiety represented by A in the  general formulae (Bl), (B2), and (B3) shown below.  In one embodiment, it is preferable that the repeating unit  (B) be at least one selected from the group consisting of  repeating units of the following general formulae (Bl), (B2)  and (B3). Among these, the repeating unit represented by the  following general formula (B 1) or (B3) is more preferred, and  the repeating unit represented by the following general for› mula (Bl) is particularly preferred.  [Chem. 26]  [Chem. 27]  In the general formulae (Bl), (B2) and (B3),  A represents a structural moiety capable of decomposing  by irradiation with actinic rays or radiation to generate an acid  amon.  R 04 , R 05  and R 07  to R 09  each independently represent a  hydrogen atom, an alkyl group, a cycloalkyl group, a halogen  atom, a cyano group, or an alkoxycarbonyl group.  R 06  represents a cyano group, a carboxyl group, -CO› OR25 or-CO-N(R 26 )(R$_{27}$). R 25  represents an alkyl group,  a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an  aryl group or an aralkyl group. R 26  and R$_{27 }$ each indepen- dently represent a hydrogen atom, an alkyl group, a  cycloalkyl group, an alkenyl group, a cycloalkenyl group, an  aryl group or an aralkyl group. R 26  and R$_{27 }$may be bonded to  each other to form a ring together with a nitrogen atom.  X 1 , X 2  andX 3  each independently represent a single bond,  an arylene group, an alkylene group, a cycloalkylene group,  ---0-, -S0 2 -, --CO-, -N(R 33 )-, or a divalent con› necting group formed by a combination of two or more of  these. R 33  represents a hydrogen atom, an alkyl group, a  cycloalkyl group, an alkenyl group, a cycloalkenyl group, an  aryl group, or an aralkyl group.  A represents a structural moiety capable of decomposing  by irradiation with actinic rays or radiation to generate an acid  anion, and specific examples thereof include a photoinitiator  for photocationic polymerization, a photoinitiator for photo› radical polymerization, a photo-achromatic agent and photo› discoloring agent for coloring materials, structural moieties  contained in generally known compounds that generate an  acid by light, employed in microresists or the like.  Furthermore, A is preferably an ionic structural moiety  with a sulfonium salt structure or an iodonium salt structure.  In particular, A is preferably any of the groups represented by  the following general formulae  (ZI)  and  (ZII).  R 201 , R 202  and R 203  in the general formula  (ZI)  each inde› pendently represent an organic group.  In the general formula  (ZII),  R 204  and R 205  each indepen› dently represent an aryl group, an alkyl group or a cycloalkyl  group.  ZI  R201  e  I  -z S-R202  01  R203  ZII  -Z0 '  R204 - I - R2os  (Bl)  (B2) Ros  Ro4  I  I  *-+C-Ct-*  I  I  Ro6  X2  I  A  [Chem. 25]  (B3) 