Patent ID: 8906594

Claim:
Negative working photosensitive photoresist composition comprising: a) at least one polymer comprising a structure of the following formula: wherein R 1 -R 5 is independently H, F or CH 3 , R 6 is selected from a group consisting of a substituted aryl, unsubstituted aryl, substituted heteroaryl group and substituted heteroaryl group, R 7 is a substituted or unsubstituted benzyl group, R 8 is a linear or branched C 2 -C 10 hydroxy alkyl group or a C 2 -C 10 hydroxy alkyl acrylate and R 9 is an acid cleavable group, v=10-40 mole %, w=0-35 mole %, x=0-60 mole %, y=10-60 mole % and where z is present and ranges up to 45 mole %, b) one or more free radical initiators activated by actinic radiation, c) one or more crosslinkable acrylated monomers capable of undergoing free radical crosslinking wherein the acrylate functionality is greater than 1, and d) a solvent.