Patent ID: 11880213
Assignee: TOKYO ELECTRON LIMITED
Field: Measurement (Instruments)
Classification: CPC G  B  H | IPC B  G  H

Claim 8:
9. A substrate liquid processing method, the method comprising:
regulating, by a valve mechanism, a flow of a processing liquid in at least one liquid pipe so that the processing liquid in the at least one liquid pipe connected to a discharge nozzle is located only upstream of a first pipe measurement site of the at least one liquid pipe; and
detecting, by a liquid detection sensor, presence or absence of the processing liquid at the first pipe measurement site located at a first measurement point,
wherein the at least one liquid pipe includes a plurality of liquid pipes, and each of the plurality of liquid pipes is provided so as to be movable relative to the liquid detection sensor, and
wherein when the first pipe measurement site in each of the plurality of liquid pipes passes through the first measurement point, the liquid detection sensor detects the presence or absence of the processing liquid in the first pipe measurement site of each of the plurality of liquid pipes.