Patent ID: 8168539

Claim:
A tungsten film formation method for forming a tungsten film on a barrier layer formed at a surface of a processing target material in an evacuatable processing container, comprising: a barrier layer formation process in which a barrier layer with a uniform film thickness thereof equal to or less than 5 nm is formed upon the processing target material; a silicon-containing gas supply process in which SiH 4 as a silicon-containing gas is supplied onto said barrier layer so that a silicon decomposition intermediate material is settled on said barrier layer; and a first tungsten film formation process executed immediately after said silicon-containing gas supply process, in which a first tungsten film is formed by alternately executing multiple times: a tungsten-containing gas supply step for supplying WF 6 as a tungsten-containing gas and a hydrogen compound gas supply step for supplying hydrogen-diluted B 2 H 6 as a hydrogen compound gas with no silicon content, wherein during said first tungsten film formation process, a purge step, that includes a period of time during which an inert gas is supplied into said processing container and a period of time during which said processing container is evacuated while suspending supply of the inert gas, is executed both after executing said tungsten containing gas supply step and after executing said hydrogen compound gas supply step.