Patent ID: 7803510

Claim:
A composition comprising: (a) at least one polybenzoxazole precursor polymer comprising a diazoquinone moiety; (b) at least one plasticizer compound; (c) at least one solvent; wherein the composition is a positive working photosensitive composition, the amount of the at least one plasticizer compound present in the composition is an amount effective to reduce the sidewall angle of imaged and cured features in the coated film on the substrate to prevent stress failures in subsequent metallization of the substrate due to steep angles of the imaged features, the at least one plasticizer compound is at least one compound selected from the group consisting of a polyhydroxy compound with at least two OH groups, a saturated glycol mono ether, and a carboxylic acid ester, and the at least one plasticizer compound has a boiling point higher than the boiling point of the at least one solvent.