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The resin (B) may contain a plurality of repeating units each containing a lactone group. In this case, either one of (1) using one repeating unit where Ab in formula (AI) is a single bond and one repeating unit where Ab is -Ab$_{1 }$-CO$_{2}$-, or (2) using, in combination, two repeating units where Ab in for› mula (AI) is -Ab$_{1}$-CO$_{2}$-, is preferred. 

The content of the lactone group-containing repeating unit (in the case of containing a plurality of lactone group-con› taining repeating units, the sum total thereof) is preferably from 3 to 70 mo! %, more preferably from 5 to 60 mo! %, based on all repeating units in the resin (B). 

The resin (B) preferably contains a repeating unit having an alicyclic hydrocarbon structure substituted with a polar group. Thanks to this configuration, the adherence to sub› strate and the affinity for developer can be enhanced. The polar group is preferably a hydroxyl group or a cyano group. The hydroxyl group as the polar group forms an alcoholic hydroxyl group. 

The alicyclic hydrocarbon structure substituted with a polar group includes, for example, a structure represented by the following formula (VIIa) or (VIIb): 

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In formula (VIIa), each of R$_{2}$c to R$_{4}$c independently rep› resents a hydrogen atom, a hydroxyl group or a cyano group, provided that at least one ofR$_{2}$c to R$_{4}$c represents a hydroxyl group or a cyano group. A structure where one or two mem› bers out ofR$_{2}$c to R$_{4}$ c are a hydroxyl group with the remain› ing being a hydrogen atom is preferred, and it is more pre› ferred that two members out of R$_{2}$c to R$_{4}$ c are a hydroxyl group and the remaining one member is a hydrogen atom. 

The group represented by formula (VIIa) is preferably a dihydroxy form or monohydroxy form, more preferably a dihydroxy form. 

The repeating unit having a group represented by formula (VIIa) or (VIIb) includes a repeating unit where at least one of R$_{13}$’ to R 16 ’ in formulae (II-AB!) and (II-AB2) has a group represented by formula (VIIa) or (VIIb ), and a repeating unit represented by the following formula (Alla) or (AIIb). Examples of the former include a structure where Rs of -COO Rs is a group represented by formula (VII a) or (VIIb). 

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In formulae (Alla) and (AIIb ), R$_{1}$c represents a hydrogen atom, a methy I group, a trifluoromethy I group or a hydroxym› ethy l group. 

R$_{2}$c to R$_{4}$c have the same meaning as R$_{2}$c to R$_{4}$ c in formula (VIIa). 

Specific examples of the repeating unit represented by formula (Alla) or (AIIb) are illustrated below, but the present invention is not limited thereto. 

