Patent ID: 6190981
Filing Date: 2001-02-20
Classification: H01L

Abstract:
A method forming a metal oxide semiconductor transistor, the method comprising:providing a substrate;forming a gate oxide layer on the substrate;forming a gate on the gate oxide layer;forming an offset spacer on the sidewall of the gate;performing a first ion implantation step to form a source/drain extension in the substrate after the offset spacer is formed;forming an insulating spacer on the sidewall of the offset spacer;performing a second ion implantation step to form a source/drain region in the substrate, wherein the source/drain region comprises a part of the source/drain extension;forming salicide on the gate and on the source/drain region;removing the offset spacer; andperforming a third ion implantation step to form a halo doped region in the substrate beside the source/drain region.