Patent ID: 6350677
Filing Date: 2002-02-26
Classification: H01L

Abstract:
A method for forming a self-aligned silicide layer, comprising the steps of:providing a substrate having a gate oxide layer; forming a polysilicon layer on the gate oxide layer; planarizing the polysilicon layer until a planar top surface of the polysilicon layer is obtained; patterning the polysilicon layer and the gate oxide layer to form a gate; forming a lightly doped source/drain region in the substrate with the gate serving as an implant mask; forming a spacer on sidewalls of the gate; forming a heavily doped source/drain region in the substrate with the gate and the spacer serving as an implant mask, wherein the lightly doped source/drain region and the heavily doped source/drain region together constitute a source/drain region; performing a pre-amorphization implant process upon the substrate; and forming a silicide layer on a top surface of the gate and on a surface of the source/drain region.