Patent ID: 8021717

Claim:
A film formation method, comprising: forming a metal film or a metal compound film by CVD on a surface of a target substrate mounted on a substrate mounting table in a chamber by supplying a processing gas containing a metal chloride compound gas into the chamber from a gas ejection member provided in the chamber in a state where an interior of the chamber is exhausted and a temperature of the substrate mounting table is set to a predetermined temperature; and cleaning the interior of the chamber by supplying a cleaning gas containing Cl 2 gas from the gas ejection member into the chamber containing no target substrate, wherein during the cleaning, a pressure in the chamber is controlled and temperatures of the substrate mounting table, the gas ejection member, and a wall portion of the chamber are independently controlled, such that a temperature of a cleaning target portion is higher than or equal to a decomposition start temperature of Cl 2 gas and a temperature of a non-cleaning target portion is lower than the decomposition start temperature, so that deposits formed on the cleaning target portion are removed in a reaction rate controlled regime and corrosion of the non-cleaning target portion is prevented from occurring, and wherein the cleaning includes an initial step of performing cleaning in a rate of arrival controlled regime and a next step of removing deposits that have not been removed in the initial step in the reaction rate controlled regime.