Patent ID: 9683288
Date: 2017-06-20
CPC Classifications: C23C,H01L

Claim:
1. A method of manufacturing a semiconductor device, comprising: (a) supplying a processing gas into a processing vessel accommodating a substrate to form a thin film on the substrate; (b) supplying a fluorine-containing gas and a nitrogen monoxide gas into a first cleaning gas supply system and mixing the fluorine-containing gas with the nitrogen monoxide gas in the first cleaning gas supply system to generate an FNO gas; and (c) supplying the FNO gas into the processing vessel through the first cleaning gas supply system while simultaneously supplying the fluorine-containing gas into the processing vessel through a second cleaning gas supply system installed apart from the first cleaning gas supply system without supplying the nitrogen monoxide gas into the processing vessel through the second cleaning gas supply system, and mixing the FNO gas with the fluorine-containing gas in the processing vessel so as to remove a deposit containing the thin film adhered to an inside of the processing vessel.