Patent ID: 11906984
Assignee: HORIBA STEC, CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  C | IPC C  G

Claim 6:
7. A concentration control method that utilizes a concentration control system that comprises a flow rate control device that is provided on a supply flow path that supplies gas to an interior of a chamber, and performs control such that a flow rate of a gas flowing through this supply flow path matches a set flow rate that has been input, and a partial pressure measurement device that measures a partial pressure of a gas inside the chamber, in which
an inflow flow rate of a gas flowing into the chamber and a measurement partial pressure from the partial pressure measurement device are input into a model which estimates a state of the gas inside the chamber, and an estimated partial pressure of the gas within the chamber is estimated, and in which,
based on a set partial pressure and on the estimated partial pressure of the gas that has been estimated, the set flow rate is set in the flow rate control device.