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

Claim 8:
9. The substrate processing apparatus of claim 8,
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 the flow path forming unit selected from the multiple flow path forming units is provided,
the first band pass filter and the second band pass filter are provided along the row of the multiple flow path forming units, and
the first relative position changing mechanism is the moving mechanism.