Patent ID: 11810759

Abstract:
The RF generator is provided with a first RF power source and a second RF power source that generate RF waves of different frequencies from each other, and respectively supply RF power to a first antenna and a second antenna that are installed in a plasma reactor. The first RF power source is provided with a first computing circuit that detects a first forward wave level and a first reflected wave level by removing an oscillation frequency component and an interference wave component of the second RF power source, a second computing circuit that detects a second forward wave level and a second reflected wave level that include an oscillation frequency of the first RF power source and the oscillation frequency component and the interference wave component of the second RF power source, and an interference wave computing circuit that, on the basis of the second forward wave level and the second reflected wave level, and the first forward wave level and the first reflected wave level, calculates an interference wave level to be detected by the first RF power source.