Patent ID: 6235558
Filing Date: 2001-05-22
Classification: H01L

Abstract:
A method for fabricating a semiconductor device having a source region, a drain region, a channel region, a gate insulator film and a gate electrode, the method comprising:forming a gate insulator film on a surface of a semiconductor;forming a dopant blocking film of a specified configuration on the gate insulator film;forming a lightly doped region by doping the semiconductor with dopants at low concentration by using the dopant blocking film as a mask;forming an electrically conductive material layer on the gate insulator film after removing the dopant blocking film;forming a gate electrode by processing the conductive material layer into a configuration longer than the dopant blocking film;forming an oxide layer primarily on each side face of the gate electrode by oxidizing the gate electrode;forming a heavily doped region by doping the semiconductor with dopants at high concentration by using the gate electrode and the oxide layer as a mask; andremoving the oxide layer.