Patent ID: 8518484
Filing Date: 2013-08-27
Classification: C23C,F16J,Y10T

Abstract:
1. A vapor phase reagent dispensing apparatus comprising: a vessel which comprises a removable top wall member, a sidewall member and a bottom wall member configured to form an internal vessel compartment to hold a source chemical up to a fill level and to additionally define an inner gas volume above the fill level; said sidewall member having a protuberance that extends into the internal vessel compartment adjacent to the top wall member; said top wall member and said sidewall member having opposing flat surfaces, wherein the opposing flat surfaces are optionally in contact with one another; fastening means for securing said top wall member to said sidewall member through the opposing flat surfaces that are optionally in contact with one another; said top wall member and said protuberance having opposing flat surfaces, wherein the opposing flat surfaces are not in contact with one another and at least a portion of the opposing flat surfaces are hardened; a metal seal aligned and in contact with the hardened opposing flat surfaces of said top wall member and said protuberance; a portion of the top wall member having a carrier gas feed inlet opening comprising a bubbler tube that extends through the inner gas volume into the source chemical and through which said carrier gas can be bubbled into the source chemical to cause at least a portion of source chemical vapor to become entrained in said carrier gas to produce a flow of vapor phase reagent to said inner gas volume above the fill level, said bubbler tube having an inlet end adjacent to the top wall member and an outlet end adjacent to the bottom wall member; and a portion of the top wall member having a vapor phase reagent outlet opening through which said vapor phase reagent can be dispensed from said apparatus; wherein said hardened opposing flat surfaces of said top wall member and said protuberance have a hardness greater than the hardness of said metal seal.