Patent ID: 7115471
Filing Date: 2006-10-03
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device including a nonvolatile memory, comprising: forming an element isolation area surrounding an element area in a semiconductor substrate doped with a first type conductive impurity; forming a gate insulating film on the element area; forming selectively a cap film on the gate insulating film; burying selectively with a mask film surrounding the cap film on the gate insulating film; forming a tunnel window by removing selectively the cap film; forming an impurity diffusion layer in a surface region of the semiconductor substrate underneath the gate insulating film by introducing a second type conductive impurity using the mask film as a mask; removing the gate insulating film in the tunnel window; forming a tunnel insulating film in the tunnel window; forming a floating gate electrode film, an inter-gate electrode film, and a control gate electrode film on the tunnel insulating film; and forming a source-drain in the semiconductor substrate to interpose a surface region of the semiconductor substrate beneath the control gate electrode film by introducing the second type conductive impurity into the surface region using the control gate electrode film as a mask.