Patent ID: 6315834
Filing Date: 2001-11-13
Classification: C23C,C23G

Abstract:
A method for removing extraneous matters from a stainless device applied in a chemical vapor deposition process, comprising the steps of:(a) providing a container for holding a fluorine-containing solution formed by mixing hydrofluoric acid (HF) and ammonium hydroxide (NH.sub.4 OH);(b) immersing said stainless device in said fluorine-containing solution to remove said extraneous matters from said stainless device; and(c) heating and maintaining said fluorine-containing solution at 40.degree. C. to enhance the effect of removing said extraneous matters from said stainless device while not damaging said stainless device, while swirling said fluorine-containing solution sucb that said fluorine-containing solution flows around said stainless steel device to facilitate removal of said extraneous matters.