US 2020/0050106 Al  21  Feb. 13, 2020  -continued  (A-7)  (A-8)  (A-9)  [0243]  In the formulae, R represents a hydrogen atom, a  methyl group, or an ethyl group.  [0244]  Ra represents a hydrogen atom, an alkyl group, a  cycloalkyl group, an aryl group, an aralkyl group, an alkenyl  group, a hydroxyl group, an alkoxy group, an acyloxy group,  a cyano group, a nitro group, an amino group, a halogen  atom, an ester group (---OCOR"’ or -COOR"’: R"’ repre› sents an alkyl group or fluorinated alkyl group having  1  to  20 carbon atoms), or a carboxyl group. Further, the alkyl  group, the cycloalkyl group, the aryl group, the aralkyl  group, and the alkenyl group may each have a substituent. In  addition, a hydrogen atom bonded to a carbon atom in the  group represented by Ra may be substituted with a fluorine  atom or an iodine atom.  [0245]  Furthermore, R’ and R" each independently repre› sent an alkyl group, a cycloalkyl group, an aryl group, an  aralkyl group, an alkenyl group, a hydroxyl group, an alkoxy  group, an acyloxy group, a cyano group, a nitro group, an  amino group, a halogen atom, an ester group (---OCOR"’ or  -COOR"’: R"’ represents an alkyl group or fluorinated alkyl  group having  1  to 20 carbon atoms), or a carboxyl group.  Further, the alkyl group, the cycloalkyl group, the aryl  group, the aralkyl group, and the alkenyl group may each  have a substituent. In addition, a hydrogen atom bonded to  a carbon atom in the group represented by each ofR’ and R"  may be substituted with a fluorine atom or an iodine atom.  [0246]  L represents a single bond or a divalent linking  group. Examples of the divalent linking group include  -COO-, --CO-, -0-, -S-, -SO-, -SO$_{2}$ -,  an  [0249]  In Formula (B), R$_{61 }$ to R$_{64 }$ each independently  represent a hydrogen atom or an organic group, and at least  two or more of R$_{6}$ i, ... , or R$_{64 }$are organic groups.  [0250]  Furthermore, in a case where at least one of the  organic groups is a group in which a ring structure is directly  linked to the main chain in the repeating unit, the types of  the other organic groups are not particularly limited.  [0251]  In addition, in a case where all the organic groups  are not a group in which a ring structure is directly linked to  the main chain in the repeating unit, at least two or more of  the organic groups are substituents having a number of the  constituent atoms excluding hydrogen atoms of 3 or more.  [0252]  Specific examples of the repeating unit represented  by Formula (B) include the following repeating units.  (B-1)  /R  0  (B-2)  (B)  alkylene group, a cycloalkylene group, an alkenylene group,  and a linking group formed by the linking of a plurality of  these groups.  [0247]  m and n each independently represent an integer of  0  or more. The upper limits of m and n are not particularly  limited, but are preferably 2 or less in many cases, and  1  or  less in more cases.  [0248]  A specific example of a means for accomplishing  (b) above may be a method in which a repeating unit  represented by Formula (B) is introduced into the resin (A). 