Patent ID: 6046082
Filing Date: 2000-04-04
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device having a capacitor the method comprising the steps of: forming an upper electrode, a dielectric film and a lower electrode, wherein said lower electrode is formed by the steps of: forming a first silicon film containing an impurity in an amorphous state or a polycrystal state on one main surface of a semiconductor substrate by a vacuum chemical vapor growth method; patterning the first silicon film into a shape; forming a spontaneous oxide layer on the surface of the first silicon film; forming a second silicon film containing an impurity all over in the amorphous state by the vacuum chemical vapor growth method; forming a third silicon film containing no impurity all over in the amorphous state by the vacuum chemical vapor growth method without exposing to atmosphere; annealing the third silicon film in a non-oxidizing atmosphere without exposing to the atmosphere to crystallize the third silicon film and to thereby form hemispherical silicon crystal grains all over; and carrying etch back by anisotropic etching.