abstract |
The present invention relates to a method of forming an interlayer insulating film between metal wirings, metal interconnection lines or above, and a planarizing method. It is an object of the present invention to provide a method of forming an interlayer insulating film of a semiconductor device, A silicon oxide film is formed so as to cover the first wiring formed on the substrate with the silicon oxide film interposed therebetween. Then, a thick film SOG film is coated on the silicon oxide film and heat treatment is applied to the silicon oxide film , A silicon oxide film is formed, a through-hole is formed by a predetermined mask, and a heat treatment is performed. With this configuration, it is possible to provide a semiconductor device with high reliability by preventing corrosion of the formed wiring. |