Patent ID: 11920242
Assignee: TOKYO ELECTRON LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 8:
9. A substrate processing apparatus, comprising:
a processing vessel;
a placing table disposed inside the processing vessel and configured to place a substrate thereon;
a first temperature controller configured to supply a heat medium of a first temperature into a flow path provided inside the placing table;
a second temperature controller configured to supply a heat medium of a second temperature into the flow path; and
a controller,
wherein the controller is configured to control the plasma processing apparatus to switch the heat medium to be supplied into the flow path from the heat medium of the first temperature to the heat medium of the second temperature, the heat medium of the first temperature being supplied when an etching processing is performed on the substrate, the heat medium of the second temperature being supplied when a cleaning process configured to remove a reaction product adhering to an electrostatic chuck provided on the placing table is performed after the substrate is carried out of the processing vessel,
after the heat medium is switched, the controller is configured to control the plasma processing apparatus to ignite plasma by starting to supply a cleaning gas into the processing vessel,
the controller is configured to control the plasma processing apparatus to calculate a slope of temperature change of the heat medium based on a temperature of the heat medium at an outlet side of the flow path,
the controller is configured to control the plasma processing apparatus to control the second temperature controller until the temperature of the heat medium at the outlet side of the flow path is stabilized to a third temperature lower than a predetermined set value, and
the controller is configured to control the plasma processing apparatus to control the second temperature controller in order for the temperature of the heat medium at the outlet side of the flow path to reach the set value,
wherein the first temperature is in a range of about −40° C. to about −80° C., and
the set value is lower than a vaporization temperature of the heat medium.