Patent ID: 11865591
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A method of cleaning a stage in a plasma processing apparatus comprising the stage on which a cleaning wafer is placed, a processing container in which the stage is accommodated, a lifting mechanism configured to raise and lower the cleaning wafer with respect to the stage by raising and lowering a lifter pin with respect to the stage, and a high-frequency power supply connected to the stage, the method comprising:
positioning the stage and the cleaning wafer at a separation distance from each other using the lifting mechanism;
removing a deposit deposited on the stage with plasma generated by supplying a high-frequency power from the high-frequency power supply to the stage in a state in which the lifter pin is raised above the stage to hold the cleaning wafer to be spaced apart from a placement surface of the stage, after the positioning of the stage and the cleaning wafer at the separation distance from each other; and
removing a deposit deposited in the processing container using plasma in a state in which no substrate is accommodated in the processing container, before the positioning of the stage and the cleaning wafer at the separation distance from each other or after the removing of the deposit deposited on the stage.