Patent ID: 7262125
Filing Date: 2007-08-28
Classification: C23C,H01L

Abstract:
1. A method of forming tungsten film on a substrate in a reaction chamber, the method comprising: (a) positioning the substrate in the reaction chamber; (b) exposing the substrate to a boron-containing species to form a boron-containing layer; (c) contacting the boron-containing layer with a tungsten-containing precursor to form a tungsten nucleation layer; (d) depositing a bulk tungsten layer over the tungsten nucleation layer to form the tungsten film; wherein at least one of the boron-containing species and the tungsten containing precursor reactants is provided to the reaction chamber by stabilizing a flow of the reactant by diverting the flow to an exhaust port without passing through the reaction chamber; and then pressurizing a gas line leading to the reaction chamber by flowing the reactant to the gas line prior to allowing the reactant to enter the reaction chamber.