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

Claim 6:
7. 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 one first power feeding coil configured to feed power to the first power receiving coil and the second power receiving 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 is configured to have a variable output frequency such that radio-frequency power having a frequency corresponding to the first resonance frequency and radio-frequency power having a frequency corresponding to the second resonance frequency can be selectively supplied to the first power feeding coil.