Patent ID: 8330276

Claim:
A semiconductor device comprising: a first interconnect layer insulating film; a plurality of first copper interconnects that are embedded in said first interconnect layer insulating film; an interlayer insulating film that is formed on said first copper interconnects and said first interconnect layer insulating film; a second interconnect layer insulating film that is formed on said interlayer insulating film; and a plurality of second copper interconnects that are embedded in said second interconnect layer insulating film, wherein said first interconnect layer insulating film including a first low dielectric constant film that is made of an insulating film material having a relative permittivity lower than 3.0, wherein said second interconnect layer insulating film including a second low dielectric constant film that is made of an insulating film material having a relative permittivity lower than 3.0, and wherein said interlayer insulating film having higher mechanical strength than said first and second interconnect layer insulating films, wherein said interlayer insulating film is of a different material than said second interconnect layer insulating film.