Patent ID: 6787191
Filing Date: 2004-09-07
Classification: C09D,H01L,Y10T

Abstract:
A coating composition for use in producing an insulating thin film, comprising:(A) at least one silica precursor selected from the group consisting of the following silica precursors (A-1) and (A-2): a silica precursor (A-1) comprised of at least one compound selected from the group consisting of an alkoxysilane represented by the following formula (1) and a hydrolysis product thereof: R1nSi(OR2)4-nâ€ƒâ€ƒ(1) wherein each R1 independently represents a hydrogen atom, a straight chain or branched alkyl group having 1 to 6 carbon atoms, a vinyl group or a phenyl group, each R2 independently represents a straight chain or branched alkyl group having 1 to 6 carbon atoms and n represents an integer of from 0 to 3; and a silica precursor (A-2) comprised of at least one compound selected from the group consisting of an alkoxysilane represented by the following formula (2) and a hydrolysis product thereof: R3m(R4O)3-mSiâ€”(R7)pâ€”Si(OR5)3-qR6qâ€ƒâ€ƒ(2) wherein each R3 independently represents a hydrogen atom, a straight chain or branched alkyl group having 1 to 6 carbon atoms, a vinyl group or a phenyl group, each R4 independently represents a straight chain or branched alkyl group having 1 to 6 carbon atoms, each R5 independently represents a straight chain or branched alkyl group having 1 to 6 carbon atoms, each R6 independently represents a hydrogen atom, a straight chain or branched alkyl group having 1 to 6 carbon atoms, a vinyl group or a phenyl group, R7 represents an oxygen atom, a phenylene group or a group represented by the formula: â€”(CH2)râ€” wherein r represents an integer of from 1 to 6, each of m and q independently represents an integer of from 0 to 2, and p represents 0 or 1; (B) at least one organic polymer; (C) water; (D) at least one alcohol; (F) phosphoric acid; and optionally (E) an organic solvent for a mixture of said components (A), (B), (C), (D) and (F); wherein the weight ratio (WR) of said water (C) to said at least one silica precursor (A) satisfies the formula 0.01with the proviso that when said at least one organic polymer (B) is insoluble in a mixture of said water (C) and said alcohol (D), said coating composition comprises all of said components (A), (B), (C), (D), (F) and (E).