Patent ID: 6399467
Filing Date: 2002-06-04
Classification: H01L

Abstract:
A method of forming a silicide, the method comprising:forming a metal layer over a gate area, a first oxide layer and a second oxide layer, wherein the first oxide layer covers a source area and the second oxide layer covers a drain area; forming a capping layer over the metal layer, the capping layer comprising a material that can reduce an oxide; applying a first thermal anneal that causes the metal layer to at least partially react with the gate area to form a first silicide layer over the gate area; applying a second thermal anneal, wherein the second thermal anneal causes (1) the metal layer to further react with the gate area, (2) the material of the capping layer to diffuse through the metal layer and reduce the first and second oxide layers, and (3) the metal layer to at least partially react with the source and drain areas to form second and third silicide layers; and removing unreacted portions of the metal layer.