Patent ID: 7220631
Filing Date: 2007-05-22
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device comprising steps of: forming a gate electrode on a semiconductor substrate with a gate insulation film formed therebetween; implanting a dopant into the semiconductor substrate with the gate electrode as a mask to form a lightly doped source region in the semiconductor substrate on one side of the gate electrode and a lightly doped drain region in the semiconductor substrate on the other side of the gate electrode; forming a sidewall insulation film on the side wall of the gate electrode; implanting a dopant into the semiconductor substrate with a first mask covering a peripheral part of the lightly doped drain region, with the gate electrode and the sidewall insulation film as another mask, to form a heavily doped source region in the semiconductor substrate on the one side of the gate electrode and a heavily doped drain region in a region of the lightly doped drain region except a peripheral part of the lightly doped drain region; removing the first mask and forming a second mask covering an entire peripheral part top surface of the heavily doped drain region, wherein the second mask exposing the heavily doped source region and a top portion of the gate electrodes; and forming a first silicide layer on the heavily doped source region and a second silicide layer in a region of the heavily doped drain region except the entire peripheral part top surface of the heavily doped drain region, with the second mask as a mask.