Patent ID: 7842609

Claim:
A method of manufacturing a semiconductor device, comprising, in the following order: forming a hole in an insulating layer arranged above a surface of a semiconductor substrate; forming a first tungsten layer in said hole by heating said semiconductor substrate carried into a reaction chamber at a temperature of equal to or more than 330° C. and equal to or less than 400° C. and introducing tungsten-containing gas and at least one of B 2 H 6 gas and SiH 4 gas into said reaction chamber; introducing at least one of H 2 gas and inert gas into said reaction chamber and raising the temperature of said semiconductor substrate to equal to or more than 370° C. and equal to or less than 410° C. with 30 or more seconds; and forming a second tungsten layer on said first tungsten layer by introducing tungsten-containing gas into said reaction chamber.