Patent ID: 7291567

Claim:
A method of forming a silica-based film, the method comprising: applying a composition for forming an insulating film for a semiconductor device, which is cured by using heat and ultraviolet radiation, to a substrate to form a coating; heating the coating; and applying heat and ultraviolet radiation to the coating to effect a curing treatment; wherein the composition includes: a hydrolysis-condensation product produced by hydrolysis and condensation of at least one silane compound selected from the group consisting of compounds shown by the following general formula (A), and at least one silane compound selected from the group consisting of compounds shown by the following general formula (B) and compounds shown by the following general formula (C); and an organic solvent, wherein R 1 to R 8 individually represent an alkyl group or an aryl group, and X represents the following general formula (A1) or (A2), wherein Y 1 to Y 8 individually represent a hydrogen atom, a fluorine atom, an alkyl group, or an aryl group, provided that Y 1 and Y 2 or Y 5 and Y 6 may form a ring in combination, (R 9 ) a —Si—(OR 10 ) 4-a (B) wherein R 9 and R 10 represent an alkyl group or an aryl group, and a represents an integer from 0 to 3, R 11 b (R 12 O) 3-b Si—(R 15 ) d —Si(OR 13 ) 3-c R 14 c (C) wherein R 11 to R 14 individually represent an alkyl group or an aryl group, b and c individually represent an integer from 0 to 2, R 15 represents an oxygen atom, a phenylene group, or a group —(CH 2 ) m —(wherein m represents an integer from 1 to 6), and d represents 0 or 1.