Patent ID: 6340622
Filing Date: 2002-01-22
Classification: H01L

Abstract:
A method for fabricating a capacitor of a semiconductor device, comprising the steps of:forming a lower electrode having an exposed surface on a semiconductor substrate, the lower electrode having a surface composition adjacent the exposed surface and a bulk composition, the surface composition and the bulk composition being substantially the same; depositing an amorphous TaON thin film over the exposed surface of the lower electrode; subjecting the deposited amorphous TaON thin film to a first thermal process at a first temperature; subjecting the TaON thin film to a second thermal process at a second temperature, the second temperature being greater than the first temperature and sufficiently high to form a substantially crystalline TaON dielectric film; and forming an upper electrode on the TaON dielectric film; wherein the step of subjecting the TaON thin film to a second thermal process comprising a final anneal before the step of forming the upper electrode.