Patent ID: 7528429

Claim:
A ferroelectric capacitor comprising: a base substrate; a first electrode provided above the base substrate; a ferroelectric layer provided above and in direct contact with the first electrode and, wherein ferroelectric layer is operable to provide memory functionality; a conductive film a) is composed of at least one material selected from a group consisting of Pt, Ir, Au, Os, In, Sn, Ru and W, or an oxide thereof and b) provided on the ferroelectric layer, wherein the conductive film has a film thickness of 5 nm or less and such that the conductive film is influenced by surface morphology of the ferroelectric layer to prevent strain from being generated in the conductive film; a sacrificial layer composed of dielectric material provided above and in direct contact with the conductive film, wherein the sacrificial layer has a film thickness between 5 nm and 20 nm and is deteriorated such that the sacrificial has a plurality of leak points that each have a lower degree of nonconductivity compared to a characteristic nonconductivity of the dielectric material and that allow polarization charges collected by the conductive film to reach the second electrode; and a second electrode provided above the sacrificial layer.