Patent ID: 6686236
Filing Date: 2004-02-03
Classification: C23C,H01L

Abstract:
A method of forming an FeRAM capacitor, comprising:forming an over-oxygenated conductive oxide film as at least a portion of a bottom electrode layer over a substrate, wherein forming the over-oxygenated conductive oxide film comprises: establishing an oxygen environment of about 40-50% oxygen within a deposition chamber; reducing a film deposition rate of the portion of the bottom electrode layer from a first, rate to a second, slower rate in the oxygen environment for a predetermined period of time, wherein the conductive oxide film contains a larger amount of oxygen therein than would otherwise reside therein at the first, conventional deposition rate within the predetermined period of time; forming a ferroelectric dielectric layer over the over-oxygenated conductive oxide film; and forming a top electrode layer over the ferroelectric dielectric layer.