Patent ID: 6659111
Filing Date: 2003-12-09
Classification: C23C,C23F,H01L,Y10S

Abstract:
A method for removing a deposited material from inside surfaces of a vacuum treatment apparatus for forming a thin film of one of Ti, W, Ta, Ru and Ir, a compound including one of Ti, W, Ta, Ru and Ir or an alloy including one of Ti, W, Ta, Ru and Ir, said method comprising flowing a cleaning gas in a vacuum chamber,wherein the cleaning gas comprises HF gas and oxygen containing gas, a concentration of the HF gas is greater than or equal to 1 vol %, and a concentration of said oxygen containing gas ranges from 0.5 to 99 vol %, and a sum of a partial pressure of the HF as and partial pressure of the oxygen containing gas during the cleaning gas flowing is smaller than or equal to 500 Torr.