Patent ID: 6787466
Filing Date: 2004-09-07
Classification: H01L

Abstract:
A method for the formation of a refractory metal nucleation layer on a semiconductor device substrate, the method comprising:depositing a metallic barrier layer on the semiconductor device substrate; exposing the metallic barrier layer to a silicon containing gas to form a layer of silicon on the metallic barrier layer; purging the silicon containing gas; exposing the layer of silicon to a refractory metal containing gas such that the refractory metal containing gas undergoes a reduction reaction with the layer of silicon resulting in the formation of a refractory metal layer on the metallic barrier layer; purging the refractory metal containing gas; and conducting an alternating exposure of the metallic refractory layer to the silicon containing gas and the refractory metal containing gas to deposit additional refractory metal on the refractory metal layer and thereby increase the thickness of the refractory metal layer and thereby form a refractory metal nucleation layer.