Patent ID: 8026038

Claim:
A heat curable metal oxide-containing film-forming composition comprising (A) a metal oxide-containing compound obtained through hydrolytic condensation between one or multiple hydrolyzable silicon compounds having the general formula (1) and one or multiple hydrolyzable metal compounds having the general formula (2): R 1 m1 R 2 m2 R 3 m3 Si(OR) (4-m1-m2-m3) (1) wherein R is an alkyl of 1 to 6 carbon atoms, R 1 , R 2 and R 3 each are hydrogen or a monovalent organic group of 1 to 30 carbon atoms, m1, m2 and m3 each are 0 or 1, and m1+m2+m3 is an integer of 0 to 3, U(OR 4 ) m4 (OR 5 ) m5 (2) wherein U is an element selected from the group consisting of boron, gallium, germanium, bismuth, phosphorus, vanadium, arsenic, niobium, and tantlum, R 4 and R 5 each are an organic group of 1 to 30 carbon atoms, m4 and m5 each are an integer inclusive of 0, and m4+m5 is equal to the valence of U, (B) at least one compound having the general formula (3) or (4): L a H b X (3) wherein L is lithium, sodium, potassium, rubidium or cesium, X is a hydroxyl group or a mono or polyfunctional organic acid residue of 1 to 30 carbon atoms, “a” is an integer of at least 1, “b” is 0 or an integer of at least 1, and a+b is equal to the valence of hydroxyl group or organic acid residue, M a H b A (4) wherein M is sulfonium, iodonium or ammonium, A is X or a non-nucleophilic counter ion, “a” and “b” are as defined above, and a+b is equal to the valence of hydroxyl group, organic acid residue or non-nucleophilic counter ion, (C) a mono or polyfunctional organic acid of 1 to 30 carbon atoms, and (D) an organic solvent.