Patent ID: 7709366
Filing Date: 2010-05-04
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: (a) forming a gate insulating film on the semiconductor substrate; (b) forming a gate electrode on the gate insulating film; (c) forming a first silicon nitride film on the gate electrode; (d) forming a sidewall which is formed only by a silicon oxide film so as to reach to a surface of the semiconductor substrate and which is formed at a side surface of the gate electrode; (e) forming impurity regions at both sides of the gate electrode in the semiconductor substrate; (f) forming a silicon layer selectively on the impurity region so as to contact with a surface of the sidewall; (g) forming a second silicon nitride film partially on the silicon layer and partially at a side surface of the silicon oxide film; (h) forming a conductive layer on the silicon layer, the first silicon nitride film, and the second silicon nitride film; wherein steps (c) and (d) are performed in sequence.