Patent ID: 8138445

Claim:
A plasma processing apparatus comprising: an evacuable processing chamber which is grounded; a first electrode attached to the processing chamber via an insulating material or a space; a second electrode disposed in parallel with the first electrode space apart therefrom in the processing chamber, the second electrode supporting a target substrate to face the first electrode; a first radio frequency power supply unit for applying a first radio frequency power of a first frequency to the second electrode; a second radio frequency power supply unit for applying a second radio frequency power of a second frequency lower than the first frequency to the second electrode; a processing gas supply unit for supplying a processing gas to a processing space formed by the first and the second electrode and a sidewall of the processing chamber; a DC power supply for applying a DC voltage to the first electrode; and a filter electrically connected between the first electrode and the DC power supply, the filter allowing a direct current to substantially pass therethrough and having a resonance frequency associated with the second frequency and an antiresonance frequency associated with the first frequency.