Patent ID: 7642185

Claim:
An insulating film forming method, comprising steps of: forming a first film comprising silicon carbide over a substrate; forming a second film on the first film, the second film comprising one insulating material selected from the group consisting of oxygen-doped silicon carbide, silicon oxycarbide and hydrogen silsesquioxane, wherein the step of forming the second film includes a step of forming the second film by exposing a surface of the first film to an oxidizing atmosphere to oxidize a surface layer of the first film, and making the second film in contact with chemical which makes a surface of the second film hydrophilic; exposing the substrate formed with the second film to hydrogen plasma; and forming a third film on the second film, the third film being an insulating film comprising a low dielectric constant insulating material having a relative dielectric constant of 2.7 or smaller or an insulating film disposed through a coating method.