Patent ID: 6436776
Filing Date: 2002-08-20
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:forming a gate electrode on a semiconductor substrate through a gate insulating film; forming a protective insulating film on a sidewall of the gate electrode; forming a first side-wall insulating film on the protective insulating film formed on the side-wall of the gate electrode; forming a first impurity diffusion layer on a surface of the semiconductor substrate by using the gate electrode and the first side-wall insulating film as a mask; removing the first side-wall insulating film after the step of forming the first impurity diffusion layer; forming a second impurity diffusion layer on the surface of the semiconductor substrate by using the gate electrode and the protective insulating film as a mask after the step of removing the first side-wall insulating film; forming a second side-wall insulating film on the protective insulating film formed on the side-wall of the gate electrode after the step of forming the second impurity diffusion layer; and forming a conductive film on an upper surface of the gate electrode and on a surface of the second impurity diffusion layer by using the second side-wall insulating film as a mask.