Patent ID: 6387803
Filing Date: 2002-05-14
Classification: H01L

Abstract:
A method for forming a silicide region on a silicon body, said method comprising the steps of:a) producing an amorphous region on the silicon body; b) forming a metal layer in contact with the amorphous region; and c) irradiating the metal layer with light to initiate melting of said amorphous region and to diffuse metal of said matel layer into the amorphous region to form an alloy region of silicide composition, with the irradiaiting step proceeding at least until the metal layer is consumed by the amorphous region exposing a molten surface of the alloy region with increased reflectivity relative to the metal reflectivity of the metal layer being sufficient to prevent further significant melting of the alloyed region by reflecting significantly more of the irradiating light than initially reflected by the metal layer.