Patent ID: 6454914
Filing Date: 2002-09-24
Classification: H01L

Abstract:
A method for manufacturing a ferroelectric capacitor comprising the steps of:forming a layer of columnar crystals comprising a metal selected from the group consisting of W, Ti, Ta, Ir, Pt, Ru, Re, Pd, and Os on a substrate as a base layer by a sputtering method, oxidizing the crystals at the surface of the base layer to form a metal oxide between the columnar crystals of the layer to substantially prevent a penetration of oxygen through the layer, forming a conductive layer on the oxidized surface of the base layer, forming at least one of a ferroelectric film and a dielectric layer having a perovskite structure on the conductive layer as an insulative layer, and forming an upper electrode on the insulative layer, wherein the conductive layer substantially prevents degradation of the orientation of the insulative layer.