Patent ID: 6375194
Filing Date: 2002-04-23
Classification: F16J,F16L,H01L

Abstract:
A method of preventing leakage of process gases or liquids from a joint between an external piping and a piping in a semiconductor processing system, said method comprising:removing said external piping from said joint; machining said external piping to form a notch in a flange of said external piping, said notch generally rectangular in cross-section and shaped to accommodate an O-ring, and positioning said machined external pipe along a flowpath defined through said external piping and said piping; providing an O-ring for use with said flange; fastening said O-ring in said notch between said flange and a generally flat surface of said piping with a fastening mechanism attachable after mating said external piping and said piping to prevent leakage of process gases or liquids from said joint.