Patent ID: 6861756

Claim:
A semiconductor integrated circuit device, comprising: a first insulating film formed over a semiconductor substrate; a first interconnection serving as a wiring line, buried in a surface of said first insulating film and including a first conductor film and a second conductor film having copper as a main component, wherein said first conductor film is interposed between said second conductor film and said first insulating film and includes a function to suppress diffusion of copper; a second insulating film formed over said first interconnection, said second insulating film including a function to suppress diffusion of copper; a third insulating film formed over said second insulating film; a second interconnection serving as a wiring line, including aluminum as a main component and formed over said third insulating film; and a connecting conductor buried in said second insulating film and third insulating film, wherein said connecting conductor is contacting said first interconnection and said second interconnection and includes a function to suppress diffusion of copper, a fourth insulating film formed over said second interconnection; a third interconnection connecting with said second interconnection through said fourth insulating film by a connecting portion formed therein, including aluminum as a main component and formed over said fourth insulating film, and wherein said third interconnection includes an electrode extending portion electrically connected to a pad portion.