Patent ID: 7947338

Claim:
A method of forming an interlayer insulating film for forming the interlayer insulating film on a substrate, comprising a step of forming the interlayer insulating film by plasma CVD using, as a raw material, an organic siloxane compound including one or more silicon atoms each having at least three or more units each represented by the following general formula: —O—Si(R 1 R 2 )—OR 3 wherein R 1 and R 2 are the same as or different from each other and are a methyl group, an ethyl group or a propyl group, and R 3 is the same as or different from R 1 and R 2 and is a methyl group, an ethyl group, a propyl group or a phenyl group, and wherein the interlayer insulating film includes a siloxane skeleton in which a repeating unit of bonding is a unit of [Si—O—Si] formed by polymerizing Si—O—R sites in the raw material.