Patent ID: 7109128
Filing Date: 2006-09-19
Classification: H01L,Y10S

Abstract:
1. A semiconductor device manufacturing method comprising the steps: forming a gate electrode on a semiconductor substrate of one conductivity type via a gate insulating film; forming a first insulating film on an upper surface of the semiconductor substrate and an upper surface and side surface of the gate electrode; forming a second insulating film, which is made of different material from the first insulating film, on the first insulating film; etching the second insulating film to leave on sides of the gate electrode; etching selectively the first insulating film by using the second insulating film as a mask to leave the first insulating film in a region between the gate electrode and the second insulating film and to form spaces between the upper surface of the semiconductor substrate and the first insulating film and the second insulating film; forming first and second pocket regions of one conductivity type on both sides under the gate electrode by implanting one conductivity type ion into the upper surface of the semiconductor substrate in an oblique direction while using the first insulating film and the second insulating film, being left on the sides of the gate electrode, and the gate electrode as a first mask; forming first and second impurity diffusion regions of opposite conductivity type, which are connected to the first and second pocket regions in the semiconductor substrate separately and serve as source/drain, by introducing an opposite conductivity type impurity into the semiconductor substrate while using the first insulating film and the second insulating film, being left on the sides of the gate electrode, and the gate electrode, as a second mask; and forming insulating sidewall spacers filling the spaces below the second insulating film, on side surfaces of the second insulating film.