153  US 9,323,150 B2  154  --f-CH,-CH+- Vy  OH  OH  -+CH2-CH+- -+CH2-CH+- OH  -continued  The resin (Ab) in its one form may comprise a repeating  unit (B) (hereinafter referred to as an "acid generating repeat› ing unit (B)" or a "repeating unit (B)") containing a structural  moiety that when exposed to actinic rays or radiation, is  decomposed to thereby generate an acid.  This structural moiety may be, for example, a structural  moiety that when exposed to actinic rays or radiation, is  decomposed to thereby generate an acid anion in the repeat› ing unit (B), or a structural moiety that releases an acid anion  to thereby generate a cation structure in the repeating unit (B).  It is preferred for this structural moiety to be, for example,  an ionic structural moiety with a sulfonium salt structure or an  iodonium salt structure.  This structural moiety may be, for example, the same as  that represented by A in general formulae (B 1 ), (B2) and (B3)  to be described below.  In some aspect, it is preferred for the repeating unit (B) to  be at least one member selected from the group consisting of  repeating units of general formulae (Bl), (B2) and (B3)  below. Among these, the repeating units of general formulae  (B 1) and (B3) below are more preferred. The repeating units  of general formula (B 1) below are most preferred.  (Bl)  Ro4  I  $^{*--+CH2-}$1 r-•  X1  I  A  (B2)  Ros  Ro1  I  I  *  --+C-Cr- *  I  I  Ro6 X2  I  A  (B3)  In general formulae (Bl), (B2) and (B3),  A represents a structural moiety that when exposed to  actinic rays or radiation, is decomposed to thereby generate  an acid anion.  Each ofR 04 , R 05  and R 07  to R 09  independently represents a  hydrogen atom, an alkyl group, a cycloalkyl group, a halogen  atom, a cyano group or an alkoxycarbonyl group.  R 06  represents a cyano group, a carboxyl group, -CO› OR25 or-CO-N(R 26 )(R$_{27}$ ).  R 25  represents an alkyl group,  a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an  $^{aryl group or an aralkyl group. Each ofR}$26 and R$_{27 }$indepen› dently represents a hydrogen atom, an alkyl group, a  cycloalkyl group, an alkenyl group, a cycloalkenyl group, an  aryl group or an aralkyl group. R 26  and R$_{27 }$may be bonded to  each other to thereby form a ring in cooperation with the  nitrogen atom.  Each of Xi, X 2  and X$_{3 }$ independently represents a single  bond, an arylene group, an alkylene group, a cycloalkylene  group,  -0-, -S0 2 -,  -CO-, -N(R$_{33}$)-or a bivalent  connecting group composed of 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. 