Patent ID: 8039884

Claim:
A semiconductor device comprising: a ferroelectric capacitor including a first electrode, a ferroelectric film, and a second electrode, the first electrode being disposed above a substrate, the ferroelectric film being disposed on the first electrode, the second electrode being disposed on the ferroelectric film; a hydrogen barrier film disposed on a top surface and a side surface of the ferroelectric capacitor; an interlayer dielectric film disposed on the hydrogen barrier film; a first contact hole that opens the interlayer dielectric film; a second contact hole that opens the hydrogen barrier film on the second electrode, the second contact hole connecting to the first contact hole; a barrier metal that suppresses a diffusion of hydrogen, the barrier metal disposed on a top surface of the second electrode, an inner wall surface of the first contact hole, and an inner wall surface of the second contact hole; and a plug section disposed on the barrier metal in the first contact hole, a cross section of the inner wall surface of the second contact hole being concave, an angle between a tangential line of the cross section of the inner wall surface of the second contact hole and a top surface of the second electrode decreasing as a distance from a top surface of the hydrogen barrier film to a bottom surface of the hydrogen barrier film increasing for an entirety of the second contact hole, an area of a bottom surface of the second contact hole being smaller than an area of a top surface of the second contact hole.