Patent ID: 6784080
Filing Date: 2004-08-31
Classification: H01J,H01L

Abstract:
A method of manufacturing a semiconductor device, comprising the steps of:electrically isolating a diode formation region on a semiconductor substrate by an element isolation layer; holding, in a vacuum chamber, said semiconductor substrate at which said element isolation layer is formed and an impurity solid including impurity to be introduced into said diode formation region; introducing inert or reactive gas into said vacuum chamber, while said impurity solid and said semiconductor substrate are in a state where no voltage is being applied thereto, to generate plasma composed of said inert or reactive gas; while maintaining said semiconductor substrate in a state where no voltage is being applied thereto, applying to said impurity solid first voltage which allows said impurity solid to serve as a cathode for said plasma, performing sputtering of said impurity solid by ions in said plasma, and thereby mixing said impurity in said impurity solid into said plasma; after resuming said impurity solid back to a state where no voltage is being applied thereto, applying to said semiconductor substrate held in said vacuum chamber a second voltage which allows said semiconductor substrate to serve as a cathode for said plasma to cause a potential difference between said plasma and said semiconductor substrate so that said impurity mixed into said plasma is introduced directly to a surface portion of said diode formation region at said semiconductor substrate to form an impurity layer; and forming, on said semiconductor substrate at which said impurity layer is formed, an interconnection layer electrically connected to said impurity layer.