Patent ID: 7220520

Claim:
A photosensitive resin composition comprising: (a) at least one polybenzoxazole precursor polymer; (b) at least one compound having structure VI V 1 —Y—V 2 VI wherein Y is selected from the group consisting of S, O, NR 2 , (HOCH) p , and wherein each R 1 is independently selected from the group consisting of H, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, and a halogen, each R 2 is independently selected from the group consisting of H, SH, CH 3 , C 2 H 5 , and a linear or branched C 1 –C 4 alkyl group containing a thiol group; and wherein V 1 and V 2 are independently selected from the group consisting of wherein, m is independently an integer from 0 to 4 with the proviso that m can=0 only when Y= n is an integer from 1 to 5; p is an integer of from 1 to 4, and (c) at least one organic solvent; wherein the amount of the compound of Structure VI present in the composition is effective to inhibit residue from forming when a photosensitive composition is coated on a substrate and the resulting coated substrate is subsequently processed to form an image on the substrate with the proviso that if the polybenzoxazole precursor polymer solely consists of polybenzoxazole precursor polymers that do not contain a photoactive moiety in the polymer, then (d) at least one photoactive compound is also present in the composition.