Patent ID: 7659357

Claim:
A silica film forming material, comprising a silicone polymer which comprises, as part of its structure, an Si—O—Si bond, an Si-CH 3 bond and an Si—CHx- bond, where x represents an integer of 0 to 2, wherein the silicone polymer is obtained by a hydrolysis condensation polymerization reaction of at least one silicon compound expressed by the following general formulae (1) to (3), and at least one of silicon compound expressed by the following general formulae (4) to (7): where, in the general formulas (1) to (7), n represents either 0 or 1; R 1 may be the same as or different from each other, represents one selected from the group consisting of a chlorine atom, a bromine atom, a fluorine atom, and a hydrogen atom when n=0, and represents one selected from the group consisting of a hydrocarbon with a carbon number of 1 to 4, an aromatic hydrocarbon, a hydrogen atom and a carboxyl group when n=1; R 2 represents one selected from the group consisting of a hydrocarbon with a carbon number of 1 to 4, and an aromatic hydrocarbon; and R 3 may be the same as or different from each other, and represents one selected from the group consisting of a hydrocarbon with a carbon number of 1 to 3 and an aromatic hydrocarbon.