Patent ID: 11917729
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A substrate processing method executed using a substrate processing apparatus comprising a stage on which a substrate is placed, a plurality of heaters configured to heat the substrate by being supplied with power, a plurality of power supply parts configured to supply power to the plurality of heaters, respectively, and a plurality of sensors corresponding to the plurality of heaters,
wherein the substrate processing method comprises:
storing a plurality of conversion tables corresponding to the plurality of heaters, a plurality of resistance values in the plurality of conversion tables being associated with a plurality of temperatures;
acquiring a plurality of reference resistance values corresponding to the plurality of heaters, the plurality of reference resistance values being measured by the plurality of sensors when a temperature of one heater among the plurality of heaters is a reference temperature;
acquiring a plurality of temperature adjustment resistance values corresponding to the plurality of heaters, the plurality of temperature adjustment resistance values being measured by the plurality of sensors after the substrate is heated by the plurality of heaters; and
controlling the plurality of power supply parts based on the plurality of conversion tables, the reference temperature, the plurality of reference resistance values, and the plurality of temperature adjustment resistance values,
wherein the plurality of sensors respectively measure the plurality of reference resistance values in any of a plurality of measurement periods,
a first reference resistance value corresponding to a first heater among the plurality of reference resistance values is measured in a first measurement period among the plurality of measurement periods,
a second reference resistance value corresponding to a second heater among the plurality of reference resistance values is measured in a second measurement period among the plurality of measurement periods, subsequent to the first measurement period,
a second region corresponding to the second heater among a plurality of regions is arranged not to be adjacent to a first region corresponding to the first heater among the plurality of regions, and
the substrate processing method further comprises: setting a length of an interval between the plurality of measurement periods based on a time when a temperature of the first heater decreases and becomes equal to a chiller temperature after the first measurement period among the plurality of measurement periods in which power is supplied to the first heater corresponding to the first measurement period.