Patent ID: 9606434
Date: 2017-03-28
CPC Classifications: C08F,G03F

Claim:
1. A polymer comprising, based on 100 mole percent of total repeat units, 50 to 100 mole percent of photoacid-generating repeat units; wherein each of the photoacid-generating repeat units comprises an anion, a photoacid-generating cation, and base-solubility-enhancing functionality; wherein the base-solubility-enhancing functionality resides in the photoacid-generating cation and comprises two functional groups selected from the group consisting of tertiary carboxylic acid esters, secondary carboxylic acid esters wherein the secondary carbon is substituted with at least one unsubstituted or substituted C 6-40 aryl, acetals, ketals, lactones, sultones, alpha-fluorinated esters, beta-fluorinated esters, alpha,beta-fluorinated esters, polyalkyleneglycols, alpha-fluorinated alcohols, and combinations thereof; and wherein each of the photoacid-generating repeat units independently has the structure wherein L X is independently in each photoacid-generating repeat unit a single bond, —O—, —S—, —C(═O)—, —C(R