Patent ID: 7323781
Filing Date: 2008-01-29
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a first insulating film formed over said semiconductor substrate; a wiring opening formed in said first insulating film; a wiring having a first conductive film containing copper as a primary component, and embedded in said wiring opening; a first barrier insulating film formed over said wiring and said first insulating film; a second barrier insulating film formed over said first barrier insulating film; and a second insulating film formed on said second barrier insulating film and having a lower dielectric constant than that of an oxide silicon film, wherein a barrier property of a material constituting said first barrier insulating film to copper is larger than that of a material constituting said second barrier insulating film, wherein the material constituting said second barrier insulating film has a greater adhesiveness than the material constituting said first barrier insulating film to a material constituting said second insulating film, wherein the thickness of said first barrier insulating film is greater than that of said second barrier insulating film, wherein the thickness of said first barrier insulating film is 40 nm or less, and wherein the thickness of said second barrier insulating film is 10 nm or less.