| abstract |
Resin having a structural unit of formula aa. Chemical formula aa In Chemical Formula aa, T 1 is a C4-C34 sultone ring group which may have a substituent, X 2 is -O- or -N (R c )-, R c is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and when X 2 is -O-, Z 1 is * -X 1- , * -X 3 -CO-OX 1- , * -X 3 -CO-N (R c ) -X 1- , * -X 3 -O-CO-X 1 -or * -X 3 -N (R c ) -CO-X 1 -and X 2 is -N (R c )-, Z 1 is * -X 1- , * -X 1 -OX 3- , * -X 1 -CO-, * -X 1 -X 4 -CO-X 3- , * -X 1 -CO-X 4 -X 3- , * -X 1 -X 4 -CO-X 3 -CO- or * -X 1 -CO- X 4 -X 3 -CO-, X 1 and X 3 are each independently a divalent aliphatic hydrocarbon group having 1 to 6 carbon atoms, X 4 is -O- or -N (R c )-, and * is Binding site with X 2 , R < 1> is a C1-C6 alkyl group, hydrogen atom, or halogen atom which may have a halogen atom. |