Patent ID: 11862489
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A substrate processing apparatus comprising:
a rotary stage configured to hold a substrate;
a rotary driver configured to rotate the rotary stage around a rotation axis;
at least one electric heater installed in the rotary stage;
at least one power receiving coil installed in the rotary stage and electrically connected to the at least one electric heater;
at least one power feeding coil installed to face the at least one power receiving coil in a direction of the rotation axis with a gap between the at least one power feeding coil and the at least one power receiving coil; and
a radio-frequency power supply unit configured to supply radio-frequency power to the at least one power feeding coil,
wherein the at least one electric heater includes a first heater and a second heater, the at least one power receiving coil includes a first power receiving coil and a second power receiving coil, and the at least one power feeding coil includes a first power feeding coil and a second power feeding coil,
wherein a first resonance circuit including the first heater and the first power receiving coil is formed, a second resonance circuit including the second heater and the second power receiving coil is formed, and a first resonance frequency, which is a resonance frequency of the first resonance circuit, and a second resonance frequency, which is a resonance frequency of the second resonance circuit, are different from each other, and
wherein the radio-frequency power supply unit includes a first power feeding part configured to feed, to the first power feeding coil, radio-frequency power having a frequency corresponding to the first resonance frequency, and a second power feeding part configured to feed, to the second power feeding coil, radio-frequency power having a frequency corresponding to the second resonance frequency.