Patent ID: 9709889
Date: 2017-07-18
CPC Classifications: G03F

Claim:
1. A precursor article comprising a substrate and having disposed thereon a polymeric layer comprising a reactive composition that comprises: a reactive polymer comprising a polymeric carbon backbone, and arranged along the polymeric carbon backbone, in any order: (a) recurring units comprising pendant thiosulfate groups, and (b) recurring units comprising pendant carboxy, carboxylate, phospho, phosphonate, phosphate, sulfo, sulfonate, or sulfite groups, wherein the (a) recurring units are present in an amount of at least 1 mol % and up to and including 30 mol %, and the (b) recurring units are present in an amount of at least 70 mol % and up to and including 99 mol %, both based on total recurring units in the reactive polymer.