Patent ID: 7033933

Claim:
A method of manufacturing a semiconductor device, comprising: forming a stacked layer of a first polycrystalline silicon film, a tungsten silicide film and a silicon oxide film; patterning the silicon oxide film; patterning the first polycrystalline silicon film and the tungsten silicide film using the patterned silicon oxide film as a hard mask to form a lower electrode; forming an opening in the patterned silicon oxide film; forming a dielectric film on the lower electrode; forming a second polycrystalline silicon film on the dielectric film; patterning the second polycrystalline silicon film to form an upper electrode; and heating the lower electrode at 750° C. or above in nitrogen or oxygen atmosphere using a rapid thermal annealing system prior to the forming of the dielectric film to re-crystallize part of the tungsten silicide film.