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

Claim 0:
1. A temperature measurement system comprising:
a thickness calculator configured to irradiate a measurement light on a substrate among a plurality of substrates evenly placed along a rotation direction of a rotary table and calculate an optical thickness of the substrate based on a reflected light of the measurement light;
a rotation position detector configured to detect rotation position information of the rotary table;
a substrate specifier configured to specify a substrate of which the optical thickness has been calculated by the thickness calculator, based on the rotation position information detected by the rotation position detector;
a storage configured to store first relationship information indicating a relationship between a temperature and a thickness associated with each of the plurality of substrates, and second relationship information indicating a relationship between an amount of change in temperature and an amount of change in optical thickness associated with each of the plurality of substrates; and
a temperature calculator configured to calculate a temperature of the substrate based on the optical thickness calculated by the thickness calculator, the substrate specified by the substrate specifier, the first relationship information, and the second relationship information.