Radiation-sensitive resin composition and polymer

1. A radiation-sensitive resin composition comprising:

a solvent; and

a polymer comprising:

a repeating unit (i) shown by a formula (1);

a repeating unit (ii) shown by a formula (4); and

at least one repeating unit (iii) selected from a repeating unit shown by a formula (5) and a repeating unit shown by a formula (6), a content of the repeating unit (iii) in the polymer being 20 mol % or more based on a total amount of repeating units included in the polymer,

wherein p is an integer from 0 to 3, q is an integer from 1 to 3, a sum of p and q is equal to or less than 5, R 1 represents a hydrogen atom or a methyl group, each R 2 independently represents one of a linear or branched alkyl group having 1 to 12 carbon atoms, a linear or branched alkoxy group having 1 to 12 carbon atoms, and an alicyclic hydrocarbon group having 3 to 25 carbon atoms, and each R 2 is a same as or different from each other when p is 2 or 3,

wherein R 3 represents a hydrogen atom, a fluorine atom, a methyl group, or a trifluoromethyl group, each R f independently represents one of a fluorine atom and a linear or branched perfluoroalkyl group having 1 to 10 carbon atoms, each R f is a same as or different from each other, A represents an ester bond or a single bond, G represents an alkylene group having 1 to 5 carbon atoms or a divalent alicyclic hydrocarbon group having 6 to 10 carbon atoms, M + represents a metal ion or a monovalent onium cation, and n is an integer from 1 to 8,

wherein r is an integer equal to or larger than 0, s is an integer equal to or larger than 1, a sum of r and s is equal to or less than 5, each of R 6 to R 11 represents a hydrogen atom or a fluorine atom and at least one of R 6 to R 11 represents a fluorine atom, R 12 represents a hydrogen atom or a linear or branched alkyl group having 1 to 12 carbon atoms, R 4 represents a hydrogen atom or a methyl group, each R 5 independently represents one of a linear or branched alkyl group having 1 to 12 carbon atoms, a linear or branched alkoxy group having 1 to 12 carbon atoms, and an alicyclic hydrocarbon group having 3 to 25 carbon atoms, each R 5 is a same as or different from each other when r is 2 or more, R 13 represents a hydrogen atom, a fluorine atom, a methyl group, or a trifluoromethyl group, and B represents a linear, branched, or cyclic divalent hydrocarbon group having 1 to 40 carbon atoms.

2. The radiation-sensitive resin composition according to claim 1 , wherein the repeating unit (ii) is shown by a formula (4-1) or (4-2),

wherein R 3′ represents a hydrogen atom or a methyl group.

3. The radiation-sensitive resin composition according to claim 1 , the polymer further comprising an acid-dissociable group-containing repeating unit shown by a formula (7),

wherein R 14 represents a hydrogen atom, a methyl group, or a trifluoromethyl group, and X represents an acid-dissociable group including an alicyclic skeleton having 3 to 25 carbon atoms.

4. The radiation-sensitive resin composition according to claim 1 , wherein a content of the repeating unit (i) in the polymer being 10 mol % or more based on a total amount of repeating units included in the polymer.

5. A polymer comprising:

a repeating unit (i) shown by a formula (1);

a repeating unit (ii) shown by a formula (4);

at least one repeating unit (iii) selected from a repeating unit shown by a formula (5) and a repeating unit shown by a formula (6), a content of the repeating unit (iii) in the polymer being 20 mol % or more based on a total amount of repeating units included in the polymer; and

an acid-dissociable group-containing repeating unit shown by a formula (7),

the polymer having a polystyrene-reduced weight average molecular weight determined by gel permeation chromatography of 3000 to 100,000,

wherein p is an integer from 0 to 3, q is an integer from 1 to 3, a sum of p and q is equal to or less than 5, R 1 represents a hydrogen atom or a methyl group, each R 2 independently represents one of a linear or branched alkyl group having 1 to 12 carbon atoms, a linear or branched alkoxy group having 1 to 12 carbon atoms, and an alicyclic hydrocarbon group having 3 to 25 carbon atoms, and each R 2 is a same as or different from each other when p is 2 or 3,

wherein R 3 represents a hydrogen atom, a fluorine atom, a methyl group, or a trifluoromethyl group, each R f independently represents one of a fluorine atom and a linear or branched perfluoroalkyl group having 1 to 10 carbon atoms, each R f is a same as or different from each other, A represents an ester bond or a single bond, G represents an alkylene group having 1 to 5 carbon atoms or a divalent alicyclic hydrocarbon group having 6 to 10 carbon atoms, M + represents a metal ion or a monovalent onium cation, and n is an integer from 1 to 8,

wherein r is an integer equal to or larger than 0, s is an integer equal to or larger than 1, a sum of r and s is equal to or less than 5, each of R 6 to R 11 represents a hydrogen atom or a fluorine atom and at least one of R 6 to R 11 represents a fluorine atom, R 12 represents a hydrogen atom or a linear or branched alkyl group having 1 to 12 carbon atoms, R 4 represents a hydrogen atom or a methyl group, each R 5 independently represents one of a linear or branched alkyl group having 1 to 12 carbon atoms, a linear or branched alkoxy group having 1 to 12 carbon atoms, and an alicyclic hydrocarbon group having 3 to 25 carbon atoms, each R 5 is a same as or different from each other when r is 2 or more, R 13 represents a hydrogen atom, a fluorine atom, a methyl group, or a trifluoromethyl group, and B represents a linear, branched, or cyclic divalent hydrocarbon group having 1 to 40 carbon atoms,

wherein R 14 represents a hydrogen atom, a methyl group, or a trifluoromethyl group, and X represents an acid-dissociable group including an alicyclic skeleton having 3 to 25 carbon atoms.

6. The polymer according to claim 5 , wherein a content of the repeating unit (i) in the polymer being 10 mol % or more based on a total amount of repeating units included in the polymer.