Patent ID: 7820070

Claim:
A photosensitive monomer of formula: wherein n is 1 or 2; wherein each of “L 3 ” and “L 4 ” are hydrogen, wherein“L 1 ”, “L 2 ”, “L 5 ”, and “L 6 ” are selected from hydrogen, fluorine, chlorine, cyano, alkyl, alkylcarbonyl, alkoxycarbonyl, and alkylcarbonyloxy having 1 to 7 carbon atoms, in which one or more hydrogen atoms are substituted by fluorine or chlorine; wherein“R 1 ”, “R 2 ”, “R 3 ”, and “R 4 ” are selected from hydrogen, fluorine, chlorine, cyano, thiocyanato, pentafluoro sulfanyl, nitrite, straight-chained alkyl/branched alkyl, and a “Z-Sp-P” group, straight-chained alkyl/branched alkyl having 1 to 12 carbon atoms and one or two non-adjacent 1 or 2 CH 2 groups are replaced by oxygen, sulfur, vinylene, carbonyl, caroboxyl, carbothio or alkyne; wherein at least one of “R 1 ”, “R 2 ”, “R 3 ”, and “R 4 ” is the “Z-Sp-P” group; wherein “Z” is selected from oxygen, sulfur, methyoxy, carbonyl, caroboxyl, carbamoyl, methylthio, ethenylcarbonyl, carbonylethenyl, and a single bond; wherein “Sp” is selected from straight-chained alkyl or branched alkyl, and a single bond, straight-chained alkyl or branched alkyl having 1 to 8 carbon atoms, and one or two non-adjacent CH 2 groups are replaced by oxygen or sulfur; and wherein “P” is a polymerizable group.