Patent ID: 8404050

Claim:
A plasma processing apparatus, comprising: a processing chamber for processing a substrate serving as an object to be processed; a mounting table for mounting the substrate; a first electrode for electrostatically adsorbing the substrate onto the mounting table; a ring-shaped member installed around a periphery of the substrate; a second electrode for electrostatically adsorbing the ring-shaped member onto the mounting table; a first power supply for supplying the first electrode with a first electric power having a first electric potential; a second power supply for supplying the second electrode with a second electric power having a second electric potential different from the first electric potential; and a control unit configured to control the following steps of: generating a plasma in the processing chamber in which a plasma processing is performed on the substrate; performing the processing on the substrate by the plasma; and electrostatically driving particles in a region above the substrate to remove the particles out of the region above the substrate during the plasma processing on the substrate, wherein the mounting table, the first electrode, the ring-shaped member, and the second electrode are installed in the processing chamber, wherein said driving the particles includes supplying the second electric power to the second electrode by the second power supply, and wherein the control unit is configured to control the second electric power to be turned on while the plasma is generated and to be turned off before stopping said generating the plasma.