Patent ID: 9648719
Date: 2017-05-09
CPC Classifications: G01J,H01J,H05H

Claim:
1. A high-frequency power supply device comprising: a DC power supply; a series resonant circuit including an induction coil configured for plasma generation via inductance by the induction coil, and a capacitor; a switching circuit of a half-bridge configuration or a full-bridge configuration, the switching circuit including a semiconductor device that switches DC power supplied from the DC power supply, and provides high-frequency power to the series resonant circuit; a voltage detection unit configured to detect a high-frequency input voltage of the series resonant circuit; a current detection unit configured to detect a high-frequency input current of the series resonant circuit; and a plasma input power detection unit configured to detect plasma input power based on a value of the high-frequency input voltage and the high-frequency input current detected by the voltage detection unit and the current detection unit, respectively.