Patent ID: 6200871
Filing Date: 2001-03-13
Classification: H01L

Abstract:
A method of fabricating a semiconductor device with a self-aligned silicide region, said method comprising:providing a semiconductor substrate of a first conductivity type, said semiconductor substrate has a surface;forming field insulating regions at said surface of said semiconductor substrate;forming a gate structure insulatively disposed over said substrate and between said field insulating regions, said gate structure having a top surface and a side surface and including a gate electrode;forming a disposable structure overlying said gate structure, said disposable structure having a top surface and a side surface;forming side wall insulators adjacent to said gate structure and said disposable structure and extending along side surfaces of said gate structure and said disposable structure;forming source/drain junction regions of a second conductivity type opposite said first conductivity type, said source/drain junction regions formed in said substrate adjacent to said gate structure and extending from said gate structure to said field insulating regions;providing a channel region disposed between said source/drain junction regions beneath said gate structure in said substrate;selectively removing said disposable structure;providing a silicide region formed after said disposable layer is removed thereby forming said silicide layer on said gate structure and on said source/drain junction regions, said silicide formed by depositing a layer of metal, performing a react process and removing any unreacted metal and metal composites;forming separate electrically conductive regions by means of a nonselective conductive material layer deposition process, each contacting one of said source/drain junction regions, and simultaneously forming an electrically conductive region from the same conductive material on said silicide region formed on said gate structure;and wherein said silicide region formed on said gate structure is formed between said gate structure and said conductive region, and said conductive region formed on said silicide region formed on said gate structure is located in substantially the same location as the disposable structure with substantially the same thickness as the disposable structure.