US 9,360,753 B2  125  126  -continued  -continued  i-o_,  Q  C*C ’  s~  &o  i-~_,  Q  ’*’  s  F  S03- ~  i-NH- C  Q  C*C ’  s~  &o  While the polymer is characterized by comprising, in copo› lymerized form, recurring units (al) of acid labile group› substituted (meth)acrylic acid, styrenecarboxylic acid or  vinylnaphthalenecarboxylic acid and/or recurring units (a2)  having an acid labile group-substituted phenolic hydroxyl  group, and preferably acid generator-bearing recurring units  (bl) to (b3), recurring units (c) having a phenolic hydroxyl  group as the adhesive group may be further copolymerized.  Examples of the monomer from which recurring units ( c)  having a phenolic hydroxyl group are derived are shown  below.  OH  OH  600  I~  ~  ~  .#  ✓ ,,'f  OH  OH  OH  X X  xox  $^{¢ }$0  #  OH  OH  )yo )yo  0  0  ~  OH  OH  6  HO  OH 