Patent ID: 9540727
Date: 2017-01-10
CPC Classifications: C23C,H01L

Claim:
1. A cleaning method for a process container in which a process of forming a film on a substrate is performed, the method comprising: removing a deposit including the film adhered to an interior of the process container by supplying a cleaning gas into the process container after performing the process of forming a film, wherein the act of removing the deposit includes generating a mixture gas of a fluorine-containing gas and a nitrosyl fluoride gas as the cleaning gas by mixing and reacting the fluorine-containing gas and a nitrogen monoxide gas in a mixture part, removing exothermic energy generated from the reaction of the fluorine-containing gas and the nitrogen monoxide gas by cooling at least one of the mixture part and a downstream side of the mixture part, and supplying the mixture gas from the mixture part into the process container after the cooling, and wherein the act of removing the exothermic energy is intended to reduce introduction of particles into or production of particles within the process container that may lead to product defects.