Patent ID: 6048756
Filing Date: 2000-04-11
Classification: H01L

Abstract:
A method for manufacturing a metal-oxide-semiconductor (MOS) device formed in an epitaxial silicon layer on insulator substrate comprising the steps of:a) forming a field oxide layer defined an active region of the MOS device in the silicon layer and forming a gate oxide on the silicon layer;b) forming a gate electrode on the gate oxide, and self-aligned implanting a dopant of low concentration to form a lightly doped drain region;c) forming an oxide spacer in both sides of the gate electrode;d) growing a SiGe epitaxial layer having a lower bandgap than the silicon layer only on the portion of the exposed silicon layer by a selective epitaxial growing method;e) implanting a dopant of high concentration over the SiGe epitaxial layer to form a highly doped source/drain region;f) depositing an interlayer dielectric film and forming openings in the interlayer dielectric film; andg) forming contacts in said openings.