Patent ID: 11935731
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A plasma processing apparatus comprising:
a stage provided with a heater configured to adjust a temperature of a mounting surface on which a workpiece as an object to be plasma-processed is placed;
a memory storage; and
a process controller configured to:
control power supplied to the heater such that the heater has a set temperature; measure the power supplied in an unignited state in which plasma is not ignited and a transient state of the plasma in which the power supplied to the heater decreases after the plasma is ignited, while the power supplied to the heater is controlled such that a temperature of the heater becomes constant;
calculate a heat input amount from the plasma by using the power measured in the unignited state and in the transient state to perform fitting on a calculation model for calculating the power supplied in the transient state;
output, on a user interface, information indicating a degree of plasma density of a region of the mounting surface where the heater is provided, by using the calculated heat input amount from the plasma, wherein the degree of plasma density corresponds to the calculated heat input amount from the plasma; and
change a control parameter of plasma processing based on the information indicating the degree of plasma density of the region of the mounting surface where the heater is provided such that the plasma processing on the workpiece is uniform.