Patent ID: 7781812

Claim:
A method of manufacturing a semiconductor device, comprising: forming a ferroelectric capacitor above a semiconductor substrate; forming a first interlayer insulating film covering said ferroelectric capacitor; forming a first wiring connected to an electrode of said ferroelectric capacitor, not containing copper, in said first interlayer insulating film; forming a hydrogen diffusion preventing film over said first interlayer insulating film and said first wiring; forming an etching stopper film formed over said hydrogen diffusion preventing film; forming a second interlayer insulating film directly on said etching stopper film so as to be in physical contact with said etching stopper film, wherein said second interlayer insulating film is a low dielectric film; forming a groove in said second interlayer insulating film, said etching stopper film, and said hydrogen diffusion preventing film so as to expose a surface of said first wiring; and forming a second wiring in the groove and embedded into said second interlayer insulating film, containing copper, and connected to said ferroelectric capacitor via said first wiring.