Patent ID: 6737319
Filing Date: 2004-05-18
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, said method comprising the steps of:(a) forming a first layer wiring on an underlying layer; (b) forming a first dielectric film on a structure obtained by said step (a); (c) forming a second dielectric film on said first dielectric film, said second dielectric film being made of a different material from said first dielectric film; (d) reducing a thickness of said second dielectric film by a predetermined thickness from a surface thereof to form an interlayer dielectric film made of said first dielectric film and said second dielectric film having a reduced thickness; (e) cleaning said surface of said interlayer dielectric film with a cleaning liquid whose etching rate to said first dielectric film and etching rate to said second dielectric film are substantially the same; and (f) forming a second layer wiring on said surface of said interlayer dielectric film.