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Details regarding this polymeric compound of the present invention are the same as described above within the descrip› tion of the component (Al) of the resist composition of the present invention. 

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In the formula, R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms, R 0 - 1 represents a single bond or a divalent linking group, each ofR 2 , R $^{3 }$and R$^{4 }$independently represents a linear, branched or cyclic alkyl group which may have a non-aromatic substituent, or alternatively R 3 and R 4 may be bonded to each other to form a ring together with the sulfur atom in the formula, andX represents a non-aromatic divalent linking group or a single bond. 

A more detailed description of the present invention is presented below based on a series of examples, although the present invention is in no way limited by these examples. 

In the examples, a compound represented by a chemical formula (01) is designated as "compound (01 )", and the same labeling system applies for compounds represented by other formulas. 

In the NMR analyses, tetramethylsilane (TMS) was used as an internal standardforthe $^{1}$H-NMRand $^{13}$C-NMRmeasure› ments, and hexafluorobenzene was used as an internal stan› dard for the $^{19}$F-NMR measurements (with the hexafluo› robenzene peak designated as -160 ppm). 

Of the monomers used in the polymer synthesis examples described below, the compound (01) was synthesized via a monomer synthesis example described below. Compounds (02) to (05) were synthesized in a similar manner. 

A round-bottom flask was charged with a compound A (2. 8 g), a compound B (3.8 g), dichloromethane (26 g) and pure water (26 g), and the resulting mixture was stirred for 30 minutes at room temperature. Subsequently, the dichlo› romethane layer was washed with a 1 % aqueous solution of hydrochloric acid, and was then washed repeatedly with pure water (26 g) until neutral. The organic layer was then concen› trated under reduced pressure, yielding 4.7 g of a compound (01) as a white powder. 

The obtained compound was analyzed by NMR, and the structure was identified on the basis of the results shown below. 

$^{1}$H-NMR (400 MHz, DMSO-d6): Ii (ppm)=6.1 (s, lH, CH$_{2}$=C), 5.74 (s, lH, CH$_{2}$=C), 4.58 to 4.67 (t, 2H, CH$_{2}$), 1.89 (s, 3H, CH$_{3}$ ) 

$^{19}$F-NMR (376 MHz, DMSO-d6): Ii (ppm)=-111.3 

## EXAMPLES 

## Monomer Synthesis Example 

## Synthesis of Compound (01) 

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In a separable flask fitted with a thermometer, a reflux condenser and a nitrogen inlet tube, 19 .86 g ( 62. 79 mmol) of a compound (21), 31.77 g (121.09 mmol) of a compound (11) and 8.37 g (15.95 mmol) of the compound (01) were dis› solved in 79.53 g of a mixed solvent of methyl ethyl ketone (MEK) and cyclohexanone (CH). Subsequently, 29.97 mmol of dimethyl azobisisobutyrate (V-601) was added to, and dissolved in, the solution as a polymerization initiator. The resulting solution was added dropwise, over a period of four hours and under a nitrogen atmosphere, to 42.28 g of MEK that was heated to 80° C. Following completion of the drop› wise addition, the reaction solution was stirred for one hour under heat, and was then cooled to room temperature. The thus obtained reaction polymerization solution was added dropwise to a large volume of n-heptane to precipitate the polymer, and the precipitated white powder was separated by filtration, washed with methanol, and subsequently dried, yielding 35.47 g of a polymeric compound 1 as the target compound. 

For this polymeric compound, the polystyrene-equivalent weight-average molecular weight (Mw) determined by GPC measurement was 4,300, and the molecular weight dispersity (Mw/Mn) was 1.87. 

Further, the compositional ratio of the copolymer (the pro› portion (molar ratio) of each of the structural units within the structural formula) determined by carbon-13 nuclear mag› netic resonance spectroscopy (600 MHz, $^{13}$C-NMR) was 1/rn/ n=45.9/44.0/10.1. 

## Polymer Synthesis Example 1 

## Synthesis of Polymeric Compound 1 

