Patent ID: 8659062
Filing Date: 2014-02-25
Classification: H01L

Abstract:
1. A ferroelectric capacitor comprising: a lower electrode formed above a substrate; a ferroelectric film comprising columnar crystal grains, the ferroelectric film being located above the lower electrode; an intermediate film located above the ferroelectric film and made of a perovskite-type conductive oxide, the intermediate film comprising columnar crystal grains; a first upper electrode located above the intermediate film and made of oxide of at least one metal selected from a group consisting of Pt, Pd, Rh, Ir, Ru, and Os, the first upper electrode comprising columnar crystal grains; and an amorphous or microcrystalline second upper electrode located above the first upper electrode and made of oxide of at least one metal selected from a group consisting of Pt, Pd, Rh, Ir, Ru, and Os.