Patent ID: 11972921
Assignee: TOKYO ELECTRON LIMITED
Field: Measurement (Instruments)
Classification: CPC H  C  G | IPC C  G  H

Claim 8:
9. A temperature measurement method comprising:
evenly placing a plurality of substrates along a rotation direction of a rotary table;
irradiating a measurement light on a substrate among the plurality of substrates and calculating an optical thickness of the substrate based on a reflected light of the measurement light;
detecting rotation position information of the rotary table;
specifying the substrate of which the optical thickness has been calculated; and
calculating a temperature of the substrate based on the optical thickness calculated in the calculating, the substrate specified in the specifying, first relationship information indicating a relationship between a temperature and a thickness associated with the substrate, and second relationship information indicating a relationship between an amount of change in temperature and an amount of change in optical thickness associated with the substrate.