Patent ID: 7767056

Claim:
A High-Frequency plasma processing apparatus, comprising: a process chamber in which a substrate to be processed is placed; a process-gas introduction line for introducing a process gas into the process chamber; a first HF electrode provided in the process chamber; a first HF power source for applying voltage to the first HF electrode, thereby generating plasma of the process gas; a second HF electrode facing the first HF electrode in the process chamber, interposing discharge space; a series resonator connecting the second HF electrode and the ground, which is resonant at the frequency of the first HF power source, wherein the series resonator is a coaxial resonator comprising an inner conductor supporting the second HF electrode at an end and an outer conductor surrounding the inner conductor outside the process chamber, and a cavity of the coaxial resonator where the resonance takes place is located outside the process chamber; and a reactance controller for controlling reactance on the coaxial resonator to automatically establish the resonance.