Patent ID: 6635523
Filing Date: 2003-10-21
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:forming a semiconductor film electrically connected to a semiconductor substrate, the semiconductor film including a conductivity type impurity whose concentration is greater than 5Ã—1020 atoms/cm3 and less than 1Ã—1022 atoms/cm3; forming the tungsten film as a capacitor lower electrode selectively on the semiconductor film in an atmosphere where a tungsten compound gas is introduced but a reduction gas is not introduced; forming a tungsten nitride film by nitriding a surface of the tungsten film by using a nitrogen gas or a nitrogen containing gas; forming a capacitor dielectric film made of oxygen compound on the tungsten nitride film; annealing the capacitor dielectric film in an oxygen containing gas; and forming a capacitor upper electrode made of a conductive film on the capacitor dielectric film.