Patent ID: 6858062

Claim:
A method of forming a tungsten silicide film, comprising: disposing a substrate in a process chamber, the substrate having a film thereon comprising silicon; subsequently opening a low stress valve having an outlet end connected to the process chamber, and an inlet end connected to a plurality of sources of gas via a gas inlet line, the sources of gas including a source of WF6 gas and a source of an inert carrier gas; controlling the flow of the WF6 gas through the open low stress valve and into the process chamber using a mass flow controller disposed between the gas inlet line and the source of WF6 gas; subsequently closing the low stress valve to cut off the supplying of the WF6 gas into the process chamber; subsequently venting the gas inlet line to remove residual WF6 gas therefrom; and subsequently opening the low stress valve, and allowing the inert carrier gas to flow therethrough into the process chamber.