Patent ID: 6263904
Filing Date: 2001-07-24
Classification: C23C,Y02E,Y10T

Abstract:
A gas delivery system suitable for storage and delivery of a high-purity corrosive gas comprising:a gas cylinder closed at one end and having an inner surface;a continuous nickel-phosphorus layer overlying the inner surface,wherein the nickel-phosphorus layer has an average thickness of at least about 20 micrometers,wherein the electroless nickel-phosphorus layer is subjected to a hot deionized water washing, followed by a first bake under continuous nitrogen flow and a second bake under vacuum pressure, andwherein the high-purity corrosive gas contains an Fe concentration of no greater than about 60 ppb by weight, a Cr concentration of no greater than about 10 ppb by weight, and a Ni concentration of no greater than about 5 ppb by weight.