Patent ID: 7374859

Claim:
In an electronic device that comprises a substrate having conductive properties, a process for fabricating a protective layer, comprising (a) applying to the substrate a photopolymerizable protective layer composition to form a protective layer thereon, wherein the protective layer composition consists essentially of a polymer comprising, as polymerized units, monomers of which at least 50 mole percent comprise a structure selected from the group consisting of: wherein R 1 is hydrogen or lower alkyl, R 2 is lower alkyl, and R 3 is hydrogen or lower alkyl; wherein lower alkyl includes alkyl groups having 1 to 6 linear or cyclic carbon atoms; wherein R 1 is hydrogen or lower alkyl, R 2 is lower alkyl, and R 3 and R 4 are independently hydrogen or lower alkyl; wherein lower alkyl includes alkyl groups having 1 to 6 carbon atoms, and the joining of R 1 and R 2 , or R 1 and either R 3 or R 4 , or R 2 and either R 3 or R 4 to form a 5-, 6-, or 7-membered ring; wherein R 1 is hydrogen or lower alkyl, R 2 is lower alkyl, and R and R 4 are independently hydrogen or lower alkyl; wherein lower alkyl includes alkyl groups having 1 to 6 carbon atoms, and the joining of R 1 and R 2 , or R 1 and either R 3 or R 4 , or R 2 and either R 3 or R 4 to form a 5-, 6-, or 7-membered ring; and n is 0 to 4; and (IV) mixtures of (I), (II) and/or (III); (b) irradiating the protective layer through a mask; (c) heating the device; (d) contacting the protective layer with a developing solution to remove the portions of the protective layer composition exposed to radiation in step (b) and form a patterned protective layer; (e) irradiating the patterned protective layer; and (f) heating the device.