Patent ID: 6346477
Filing Date: 2002-02-12
Classification: C23C,C30B,H01L

Abstract:
A process for forming an epitaxial cobalt disilicide layer on a silicon substrate comprising:(a) vaporizing a cobalt source precursor; (b) decomposing said cobalt source precursor on the silicon substrate to form on the silicon substrate an ultrathin interfacial layer and a cobalt layer over the ultrathin interfacial layer; (c) forming, over the cobalt layer, a capping layer comprising at least one of a refractory metal, a refractory metal nitride, a refractory metal carbide, a binary nitride of a refractory metal, a binary carbide of a refractory metal, a ternary nitride of a refractory metal and a ternary carbide of a refractory metal; and (d) annealing at a temperature sufficiently high and for a period sufficiently long to form the epitaxial cobalt disilicide layer on the silicon substrate.