Patent ID: 8535796

Claim:
A photopatternable composite composition, comprising: a sol-gel product comprising an alcohol solvent and a) a hydrolysate and/or condensate of a hydrolysable composition comprising: a1) at least one hydrolysable alkylsilane having at least one alkyl group, a2) at least one hydrolysable arylsilane having at least one aryl group or at least one hydrolysable alkylarylsilane having at least one alkylaryl group, selected from compounds represented by general formula (II) R a SiX (4-a) (II) wherein R, which may be the same or different, is a non-hydrolysable substituent selected from alkyl, aryl, and alkylaryl, at least one of which is an aryl or alkylaryl group, X is a hydrolysable substituent, and a is an integer from 1 to 3, and a3) at least one hydrolysable silane containing an epoxy group selected from compounds represented by general formula (III) RcSi(R) b X (3-b) (III) wherein Rc is a non-hydrolysable substituent having an epoxy group, R is a non-hydrolysable substituent, X is a hydrolysable substituent, and b is an integer of from 0 to 2, wherein the hydrolysable composition comprises from 15 to 60 mol-% of a1), from 30 to 80 mol-% of a2), and from 1 to 60 mol-% of a3), based on the total amount of hydrolysable compounds present in the hydrolysable composition; b) at least one cationically polymerizable organic compound having at least 2 epoxy groups; and c) a cationic photoinitiator; wherein said hydrolysate and/or condensate features a sum of abundance ratios T0 and T1 totaling less than 50% and an abundance ratio T3 of more than 15%, wherein T0: a Si atom that is not bonded to another silane molecule, T1: a Si atom that is bonded to one silane molecule through siloxane bond, T2: a Si atom which is bonded to two silane molecules through siloxane bond, T3: a Si atom that is bonded to three silane molecules through siloxane bond, and the abundance ratio of TX (%)=TX/(T0+T1+T2+T3)×100%, wherein X=0, 1, 2 or 3; and wherein the photopatternable composite composition comprises 9 to 79.99% by weight of a) and 20 to 90.99% by weight of b), based on total solids content of the composite composition.