Patent ID: 7928479

Claim:
A semiconductor device, comprising: a ferroelectric capacitor formed over a semiconductor substrate, and including a bottom electrode, a ferroelectric film and a top electrode; an interlayer insulating film covering the ferroelectric capacitor, and in which a contact hole reaching the top electrode is formed; a conductive plug formed in the contact hole, wherein a lower surface of the conductive plug is connected to the top electrode, and the conductive plug comprises: a glue film containing titanium or tantalum formed along an inner surface of the contact hole; and a tungsten film formed on the glue film; and a wiring formed on the interlayer insulating films, and electrically connected to the top electrode via the conductive plug, the top electrode having: a first conductive oxide film; a second conductive oxide film formed on the first conductive oxide film; and a cap film formed on the second conductive oxide film, composed of iridium having less catalytic action than Pt (platinum), and having a thickness of 150 nm or less, wherein a composition ratio of oxygen of said second conductive oxide film is higher than a composition ratio of oxygen of said first conductive oxide film.