group, a tris(alkylcarbonyl)methylene group, and a tris  (alkylsulfonyl)methylene group. Among those, the repeating  unit ( c) is more preferably a repeating unit having a carboxyl  group. As the repeating unit having an acidic group, all of a  repeating unit where an acidic group is directly bonded to  the main chain of the resin, such as repeating unit by an  acrylic acid or a methacrylic acid, a repeating unit where an  acidic group is bonded to the main chain of the resin through  a linking group, and a repeating unit where an acidic group  is introduced into the polymer chain terminal by using an  acidic group-containing polymerization initiator or a chain  transfer agent at the polymerization, are preferable. A repeat› ing unit by acrylic acid or methacrylic acid is particularly  preferable.  The acidic group which can be contained in the repeating  unit ( c) may or may not contain an aromatic ring, but in a  case where the aromatic ring is contained, it is preferably  selected from acidic groups. In a case where the resin (A)  contains the repeating unit having an acidic group, the  content of the repeating unit having an acidic group in the  resin (A) is usually 1 % by mole or more.  Specific examples of the repeating unit having an acidic  group are shown below, but the present invention is not  limited thereto.  In the specific examples, Rx represents H, CH$_{3}$ ,  CH$_{2}$OH,  or CF$_{3}$ •  It is also preferable that the resin (A) further has repeating  units below (hereinafter also referred to as "other repeating  units") as repeating units other than the above repeating  units.  Examples of polymerizable monomers for forming other  repeating units include styrene, alkyl-substituted styrene,  alkoxy-substituted styrene,  halogen-substituted styrene,  O-alkylated styrene,  O-acylated styrene,  hydrogenated  hydroxystyrene, maleic anhydride, acrylic acid derivatives  (acrylic acid, acrylic ester, and the like), methacrylic acid  derivatives (methacrylic acid, methacrylic ester, and the  like), N-substituted maleimide, acrylonitrile, methacryloni› trile, vinyl naphthalene, vinyl anthracene, and indene, which  may have a substituent.  The resin (A) may or may not contain these other repeat› ing units, but in a case where these other repeating units are  contained, the content of these other repeating units in the  resin (A) is generally 1 % to 30% by mole, preferably 1 % to  20% by mole, and more preferably 5% to 10% by mole, with  respect to all the repeating units constituting the resin (A).  The resin (A) may contain a repeating unit represented by  General Formula (IV) or General Formula (V).  In the formula,  R$_{6 }$ represents a hydrogen atom, a hydroxy group, a linear,  branched, or cyclic alkyl group having 1 to 10 carbon atoms,  an alkoxy group or acyloxy group, a cyano group, a nitro  group, an amino group, a halogen atom, an ester group  (-OCOR or -COOR: R is an alkyl or fluorinated alkyl  group having 1 to 6 carbon atoms), or a carboxyl group.  n$_{3 }$ represents an integer of Oto 6.  US 10,394,127 B2  41  42  OH  CF3  ry  OH  CF3  3  ry  ry  0  0  ~  0  0  OH  CF3  F3C  CF3  OH  (V)  (IV)  0  0  -continued 