Patent ID: 11879839
Assignee: TOKYO ELECTRON LIMITED
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 10:
11. The substrate processing apparatus of claim 10,
wherein the flow path forming unit includes multiple flow path forming units, and a row of the multiple flow path forming units is formed in a direction different from an arrangement direction of the light projector and the light receiver with respect to one flow path forming unit,
the light receiving-side light path forming unit, the light receiver and the light projector are shared by the multiple flow path forming units,
a moving mechanism configured to move the light receiving-side light path forming unit, the light receiver and the light projector along the row of the multiple flow path forming units such that the light receiving-side light path forming unit, the light receiver and the light projector are located at a position corresponding to a flow path forming unit selected from the multiple flow path forming units is provided, and
the second relative position changing mechanism is the moving mechanism.