Patent ID: 6114733
Filing Date: 2000-09-05
Classification: H01L

Abstract:
A partially fabricated semiconductor device, comprising:a semiconductor layer having an outer surface;a gate body separated from said outer surface of said semiconductor layer by a gate insulator;the gate body having an inner surface proximate to the semiconductor layer and an opposite outer surface;a conductive source region formed in the outer surface of the semiconductor layer and spaced apart from the gate body;a conductive drain region formed in the outer surface of the semiconductor layer and spaced apart from the gate body opposite the conductive source region to define a channel region in the semiconductor layer disposed inwardly of the gate insulator;a source side insulator body formed adjacent the gate body proximate to the conductive source region;a drain side insulator body formed adjacent the gate body proximate to the conductive drain region;thermally alterable contaminants from prior fabrication steps which have been present during processing at temperatures which would cause alteration of said contaminants and which are substantially unaltered so that said contaminants remain inert to cobalt and cobalt silicide disposed on said outer surface of said semiconductor layer;a nickel silicide layer interfused to the outer surface of the gate body, said unaltered contaminants and to the outer surface of the semiconductor layer proximate to the conductive source and drain regions; andthe nickel silicide layer having a sheet resistance of less than 20 ohms per square.