Patent ID: 11869764
Assignee: KOKUSAI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A substrate processing apparatus comprising:
a process chamber capable of accommodating a substrate;
a process gas supply system configured to supply a process gas into the process chamber via a process gas supply pipe;
an exhaust pipe configured to exhaust an inner atmosphere of the process chamber;
a gas concentration sensor configured to be capable of detecting a first concentration which is a concentration of the process gas in the process gas supply pipe or detecting a second concentration which is a concentration of the process gas contained in an exhaust gas in the exhaust pipe or detecting both of the first concentration and the second concentration; and
a controller configured to be capable of performing: (a) controlling the process gas supply system to start a supply of the process gas into the process chamber at a predetermined flow rate; and (b) controlling the process gas supply system to reduce the predetermined flow rate into the process chamber or to stop the supply of the process gas into the process chamber when an amount of the process gas consumed in the process chamber, which is calculated based on a value of the first concentration and a value of the second concentration detected by the gas concentration sensor, becomes equal to or lower than a predetermined value.