Patent ID: 11644752

Abstract:
Provided is a polymer that when used as a main chain scission-type positive resist, can sufficiently inhibit resist pattern collapse, can favorably form a clear resist pattern, and can also improve sensitivity. The polymer includes a monomer unit (A) represented by general formula (I), shown below, and a monomer unit (B) represented by general formula (II), shown below. [In formula (I), R1 is an organic group including not fewer than 5 and not more than 7 fluorine atoms. In formula (II), R2 is a hydrogen atom, a fluorine atom, an unsubstituted alkyl group, or a fluorine atom-substituted alkyl group, R3 is a hydrogen atom, an unsubstituted alkyl group, or a fluorine atom-substituted alkyl group, p and q are each an integer of not less than 0 and not more than 5, and p+q=5.]