Patent ID: 6214130
Filing Date: 2001-04-10
Classification: B08B,C23C,H01L

Abstract:
A method for cleaning up an inner wall surface of a pipe of a semiconductor device fabricating machine, comprising the steps of supplying a cleaning gas obtained by adding 1% to 5% of O.sub.2 gas to a high-purity Ar, into the pipe while heating the pipe by changing the temperature elevation rate step by step in such a manner that the temperature is elevated from room temperature to 50.degree. C. for one hour to two hours, and from 50.degree. C. to 100.degree. C. for one hour to two hours, and then, from 100.degree. C. to 200.degree. C. for one hour to two hours, thereby to effectively remove organic matter from the inner wall surface of the pipe.