Patent ID: 8278181
Filing Date: 2012-10-02
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a lower electrode over a semiconductor substrate; forming a ferroelectric film on the lower electrode; forming an upper electrode on the ferroelectric film, wherein the upper electrode is formed by forming a first conductive film of a first noble metal oxide film over the ferroelectric film, forming a second conductive film of a second noble metal oxide film, of which an oxidation degree is higher than the oxidation degree of the first conductive film, on the first conductive film by sputter method under condition in which a ratio of a flow rate of oxygen to a flow rate of argon is larger than the ratio in forming the first conductive film, on the first conductive film, and forming a third conductive film of a metal compound including nitride over the second conductive film.