Patent ID: 8470510
Filing Date: 2013-06-25
Classification: C08F,G03F

Abstract:
1. A polymer for lithographic purposes, comprising: at least a repeating structural unit represented by General Formula (I): and at least one repeating structural unit, each having a group capable of leaving with an acid to allow the residual moiety to be soluble in an alkali, wherein the repeating structural units are represented by General Formulae (IVa), (IVb), (IVc), (IVd), and (IVe): wherein R R X X R X represents a substituted or unsubstituted group having a valency of “k” and including at least one aromatic cyclic group and at least one nonaromatic group; “k” denotes an integer of 2 or more; R R R wherein the groups in the parentheses in a number of (k−1) may be the same as or different from each other, ring Z R E “s “r” is the number of R R R wherein the alicyclic hydrocarbon ring having 5 to 20 carbon atoms as Ring Z R “s” denotes 0 or 1.