Patent ID: 6096647
Filing Date: 2000-08-01
Classification: H01L

Abstract:
A method of fabricating a cobalt disilicide film in the manufacture of an integrated circuit comprising:providing a semiconductor substrate having silicon regions to be silicided;depositing a cobalt layer overlying said semiconductor substrate;subjecting said substrate to a first rapid thermal process whereby said cobalt is transformed to cobalt monosilicide where it overlies said silicon regions and wherein said cobalt not overlying said silicon regions is unreacted;removing said unreacted cobalt layer;depositing a dielectric layer overlying said substrate and said cobalt monosilicide layer;implanting silicon ions through said dielectric layer into said cobalt monosilicide layer; andthereafter subjecting said substrate to a second rapid thermal process whereby said cobalt monosilicide is transformed to cobalt disilicide wherein said silicon ions implanted into said cobalt monosilicide layer act as a silicon source for said transformation to complete formation of said cobalt disilicide film in the manufacture of said integrated circuit.