Patent ID: 8545671

Claim:
A plasma processing apparatus for generating a plasma in a plasma processing space in a processing chamber and plasma-processing a target object, the plasma processing apparatus comprising: a plasma-exciting high frequency power supply for applying a plasma-exciting high frequency power; a potential-controlling high frequency power supply for applying a potential-controlling high frequency power having a frequency lower than that of the plasma-exciting high frequency power; a DC power supply for applying a DC voltage; a mounting table for mounting thereon the target object; and an auxiliary electrode provided at a position outer side of the target object mounted on the mounting table while facing the mounting table, the auxiliary electrode being connected to the potential-controlling high frequency power supply and the DC power supply, wherein the auxiliary electrode is arranged around an outer periphery of an upper electrode to be separated from the upper electrode, wherein application of a high frequency power from the potential-controlling high frequency power supply to the auxiliary electrode and application of a DC voltage from the DC power supply to the auxiliary electrode are switched, and wherein the plasma processing apparatus further comprises a switching mechanism for switching an apply destination of a high frequency power from the potential-controlling high frequency power supply and a DC voltage from the DC power supply between the auxiliary electrode and the upper electrode.