Patent ID: 7025337
Filing Date: 2006-04-11
Classification: C23C,Y10S

Abstract:
1. A method of controlling the level of reagent in a bubbler comprising: providing a bubbler containing a quantity of reagent which is in fluid communication with a process tool; providing a reservoir which contains a quantity of the reagent which is in fluid communication with the bubbler and providing a conduit which provides communication between said reservoir and said bubbler, the conduit extending through a bottom of the bubbler upward into an interior portion of the bubbler containing the reagent such that a top of the conduit is positioned at a predetermined height above the bubbler bottom; producing a reagent-ladened carrier gas by introducing a carrier gas into said bubbler to cause vapor of said reagent to become entrained in said carrier gas and to flow to said process tool; and maintaining sufficient reagent within said bubbler to maintain an upper surface of the reagent substantially equal with the top of the conduit by equilibrating the gaseous head pressure within said bubbler with that of said conduit communicating between said reservoir and said bubbler.