Patent ID: 11972946
Assignee: EUGENE TECHNOLOGY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A method for removing impurities in a thin film, the method comprising:
providing a substrate having a thin film formed thereon in a process chamber, wherein the thin film has trench pattern;
supplying a first gas reacting and coupling with impurities contained in the thin film, into the process chamber;
exhausting a coupled product of the impurities and the first gas by stopping the supply of the first gas and depressurizing an interior of the process chamber, after supplying the first gas;
curing the thin film by supplying a second gas being different from the first gas into the process chamber, after exhausting the coupled product; and
stopping the supply of the second gas and exhausting the remaining second gas from the interior of the process chamber, after curing the thin film,
wherein supplying the first gas is performed under a first pressure of 0.1 Torr to 20 Torr inside the process chamber for a first time period,
wherein exhausting the coupled product is performed under a second pressure of 0.1 mTorr to 20 mTorr, lower than the first pressure for a second time period shorter than the first time period, by depressurizing the interior of the process chamber, and
wherein curing the thin film is performed at a pressure higher than the second pressure.