Patent ID: 7608383
Filing Date: 2009-10-27
Classification: G03F

Abstract:
1. A process for fabricating an electronic device that comprises a substrate, comprising: (a) forming a protective layer on a first side of the substrate from a composition that comprises; (i) a UV blocking agent selected from the group consisting of nitro benzoic acid, methoxy benzoic acid, nitro naphthalic acid, methoxy naphthalic acid, cinnamic acid and its derivatives, anthracene sulfonic acid and its derivatives, and carbon nanotubes; and (ii) a polymer in which at least 50 mole percent of the monomers in the polymer comprise one or more of the structures (i), (ii) and (iii) described as follows: where R 1 is hydrogen or lower alkyl; R 2 is a lower alkyl; and R 3 is hydrogen or a lower alkyl, where the definition of lower alkyl includes alkyl groups having 1 to 6 linear or cyclic carbon atoms; where R 1 is hydrogen or lower alkyl; R 2 is a lower alkyl; and R 3 and R 4 are independently hydrogen or a lower alkyl, where the definition of 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 where R 1 is hydrogen or lower alkyl; R 2 is a lower alkyl; and R 3 and R 4 are independently hydrogen or a lower alkyl; where the definition of 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 where n is 0 to 4; (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 thereby form a patterned protective layer; (e) irradiating the patterned protective layer; (f) heating the device; (g) applying to the patterned protective layer a paste composition; (h) irradiating the device from a second side of the substrate to form a pattern in the paste composition; and (i) contacting the paste composition and the patterned protective layer with a developing solution to remove (I) the portions of the paste composition not exposed to radiation in step (h), and (II) the patterned protective layer.