Patent ID: 6251779
Filing Date: 2001-06-26
Classification: H01L

Abstract:
A method of forming a self-aligned silicide (salicide) on a semiconductor wafer, the surface of the semiconductor comprising at least one silicon device, the method comprising:forming a cobalt-containing metallic layer on the semiconductor wafer which covers on the surface of the silicon device;performing a first thermal treatment process to rapidly heat the semiconductor wafer up to 300.about.500.degree. C. for 10.about.50 seconds and form a first silicide on the surface of the silicon device;performing a second thermal treatment process to rapidly heat the semiconductor wafer up to 400.about.680.degree. C. for 20.about.50 seconds and then cool down the semiconductor wafer afterwards so as to convert the first silicide into a second silicide;performing an etching process to remove the metallic layer positioned on the surface of the semiconductor wafer; andperforming a third thermal treatment process to rapidly heat the semiconductor wafer up to 700.about.950.degree. C. for 30.about.60 seconds and then cool down the semiconductor wafer afterward so as to convert the second silicide into the self-aligned silicide.