Patent ID: 8317969

Claim:
A plasma processing apparatus comprising: a vacuum-evacuable processing chamber; a lower center electrode mounting there on a substrate to be processed in the processing chamber; an annular lower peripheral electrode electrically isolated from the lower center electrode and surrounding the circumference of the lower center electrode; an upper electrode disposed above the lower center electrode and the lower peripheral electrode to be faced therewith; a process gas supplying unit for supplying a processing gas to a process space formed between the lower center electrode, the lower peripheral electrode and the upper electrode; a first radio frequency (RF) power supply for outputting a first RF power to mainly generate a plasma of the processing gas; a second radio frequency (RF) power supply for outputting a second RF power to mainly introduce ions in the plasma into the substrate; a central feed conductor connected to a rear surface of the lower center electrode to supply the first RF power from the first RF power supply and the second RF power from the second RF power supply to the lower center electrode; a circumferential feed conductor connected to a rear surface of the lower peripheral electrode to bypass and supply some of the first RF power from the first RF power supply to the lower peripheral electrode; and a movable feed conductor which is movable within a specific range and electrically connects the central feed conductor and the circumferential feed conductor with respect to the first RF power supplied from the first RF power supply by capacitance coupling.