Plasma processing apparatus and evacuation ring

A plasma processing apparatus comprising:

• a processing chamber;
• a first electrode provided inside said processing chamber, upon which the substrate can be placed;
• a second electrode provided inside said processing chamber to face opposite said first electrode;
• a process gas supply system capable of supplying a process gas into said processing chamber;
• an evacuation system capable of evacuating said processing chamber;
• and
• a high-frequency power supply system that applies high-frequency power to at least either said first electrode or said second electrode to generate plasma from the process gas and enable some of specific types of plasma processing to be executed on the substrate, wherein:
• an evacuation ring is provided around said first electrode so as to divide said processing chamber into a plasma processing space and an evacuation space with through holes and blind holes formed at said evacuation ring, and
• said through holes and/or said blind holes are formed as circular, round holes.