Patent ID: RE41948

Claim:
A semiconductor device comprising: a substrate; a first insulating film; a first wiring layer formed in the first insulating film; a second insulating film formed above the first wiring layer and the first insulating film, the second insulating film including a low dielectric constant film whose specific dielectric constant is not more than 3; a second wiring layer formed in the second insulating film, wherein a part of the second wiring layer is embedded in the low dielectric constant film, and coupled to the first wiring layer through a first connection section; and a third insulating film formed above the second wiring layer and the second insulating film and serving as one of an interlayer insulating film and a passivation film, the third insulating film covering the second wiring layer, and at least one of the first and third insulating films being one of: a film consisting essentially of SiON, a film consisting essentially of SiN, and a laminated film being the films consisting essentially of SiON or SiN, respectively , wherein the first wiring layer is physically connected to the substrate through a contact plug, and the third insulating layer is formed above a diffusion preventing film .