Patent ID: 8101703

Claim:
A process for preparing a precursor solution for polyimide/silica composite material, comprising: (A1) providing a poly(amic acid) solution; (B1) forming a solution containing micelles or particles of a silica moiety from a monomer of a silane compound; (C1) adding a monomer of formula (R 6 ) x Si(R 7 ) (4-x) (in which R 6 is a photo-polymerizable unsaturated group ended group, R 7 is halogen, C 1-6 -alkoxy, C 2-6 -alkenoxy or aryloxy and x is an integer of 1 to 3) to the solution obtained from step (B1) to allow the silica moiety to carry a photo-polymerizable unsaturated group; (D1) mixing the solutions from steps (A1) and (C1) to form a solution of polyimide/silica composite material, wherein the silica moiety carries a photo-polymerizable unsaturated group; and (E1) adding a monomer of formula R 8 N(R 9 ) 2 (in which R 8 is a photo-polymerizable unsaturated group ended group and R 9 is C 1-6 -alkyl) to the solution obtained from step (D1) to allow the poly(amic acid) to carry a photo-polymerizable unsaturated group and thus form a precursor solution for a photo-polymerizable polyimide/silica composite material.