Patent ID: 7723012

Claim:
A radiation-sensitive composition comprising: a. an alkaline soluble polymeric binder, and b. a radiation absorbing compound, the alkaline soluble polymeric binder being a poly(vinyl acetal) comprising recurring units that are represented by the following Structure (I): -(A) m -(B) n - (I) wherein: A represents recurring units represented by the following Structure (Ia): B represents recurring units represented by the following Structure (Ib): R and R′ are independently hydrogen or a substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, or halo group, R 1 is a substituted or unsubstituted phenol, substituted or unsubstituted naphthol, or substituted or unsubstituted anthracenol group, R 2 is a substituted or unsubstituted naphthol but is different from R 1 , m is at least 20 mol %, n is at least 10 mol %, and said radiation-sensitive composition further comprising a developability-enhancing composition.