Patent ID: 7429508

Claim:
A method of manufacturing a semiconductor memory device, the method comprising: forming a transistor in a first region of a semiconductor substrate having the first region and a second region; forming a first insulating film on the semiconductor substrate in the first and second regions and on the transistor; forming a first ferroelectric capacitor on the first insulating film in the first region, the first ferroelectric capacitor being electrically connected to the transistor; forming a hydrogen barrier film above the first ferroelectric capacitor and above the first insulating film in the first and second regions; forming a second insulating film on the hydrogen barrier film; forming a first contact hole penetrating the hydrogen barrier film in the first region to expose a top surface of the first ferroelectric capacitor and forming a second contact hole penetrating the hydrogen baffler film in the second region; carrying out annealing; and filling a metal material into the first and second contact holes to form a first contact connected to the first ferroelectric capacitor and a first dummy contact which is in a floating state.