Patent ID: 7473630
Filing Date: 2009-01-06
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: forming on an upper portion of the semiconductor substrate a multiple-layered insulating film that includes a first insulating layer, a second insulating layer and a third insulating layer, said second insulating layer being provided on said first insulating layer and having lower dielectric constant than the dielectric constant of said first insulating layer, said third insulating layer being provided on said second insulating layer and having higher dielectric constant than the dielectric constant of said second insulating layer; forming an insulating film by forming an opening, which extends through said multiple-layered insulating film, and covering a portion of a side surface of said opening in vicinity of an interface between said first insulating layer and said second insulating layer and a portion of a side surface of said opening in vicinity of an interface between said second insulating layer and said third insulating layer; and forming an electric conductor containing copper or copper alloy on a portion inside of said insulating film within said opening so as to extend through said multiple-layered insulating film.