Patent ID: 11971144
Assignee: TOKYO ELECTRON LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 7:
8. A gas supply method comprising: storing a gas in a storage tank connected to a processing container via a gas supply pipe; and supplying the gas stored in the storage tank into the processing container, wherein a valve is provided in the gas supply pipe between the processing container and a pressure sensor of the storage tank, and in the supplying, the opening degree of the valve in an open state is controlled based on a pressure in the storage tank detected by the pressure sensor, wherein, in the supplying, the opening degree of the valve is controlled to make a drop amount of the pressure in the storage tank become equal to a set discharge pressure of a gas supplied from the storage tank to the processing container through the valve, wherein, in the supplying, the opening degree of the valve is controlled in a first mode for fixing the valve to a constant opening degree, and subsequently, controlled in a second mode for controlling the opening degree of the valve to make the drop amount of the pressure in the storage tank become equal to the set discharge pressure.