Patent ID: 7003215
Filing Date: 2006-02-21
Classification: C23C

Abstract:
1. A vapor flow controller apparatus for delivery of chemical reagent vapors from a liquid phase source material, said controller comprising: (a) a source container containing said liquid phase source material; (b) a pump to transport said liquid phase source material to a vaporizer module, said pump having a flow rate controller; (c) said vaporizer module having a source material inlet, a carrier gas inlet, and a vaporized gas outlet, said vaporizer module adapted to convert said liquid phase source material to a vapor; (d) a source material conduit for passage of said liquid phase source material from said source container to said source material inlet of said vaporizer module; (e) a carrier gas container containing a carrier gas, said carrier gas container having a carrier gas outlet conduit controlled by a mass flow controller; (f) said flow rate controller adapted to provide flow of said liquid phase source material into said vaporizer module through said source material conduit at a desired mass flow rate, said mass flow controller adapted to provide flow of said carrier gas at a corresponding controlled rate such that said liquid phase source material is vaporized and then is entrained in said carrier gas and carried out of said vaporizer module through said vaporized gas outlet; and (g) an electronic control module that is in electrical communication with the flow rate controller and the vaporizer module to deliver the chemical reagent vapors through the vaporized gas outlet at a certain flow rate based upon information received from the vaporizer module.