Patent ID: 8747609

Claim:
A plasma processing apparatus comprising: a shower head that is installed within a processing chamber for processing a substrate therein so as to face a mounting table for mounting the substrate thereon and supplies a gas toward the substrate in a shower pattern through a plurality of gas discharge holes provided in a facing surface of the shower head facing the mounting table; a plurality of gas exhaust holes formed through the shower head to extend from the facing surface of the shower head to an opposite surface from the facing surface; a multiple number of rod-shaped magnet pillars standing upright in a gas exhaust space communicating with the gas exhaust holes on the side of the opposite surface; and a driving unit that varies a distance between the magnet pillars and the gas exhaust holes by moving at least one of the magnet pillars in a direction perpendicular to the facing surface, wherein each magnet pillar overlaps with at least one of the plurality of gas exhaust holes when viewed from a ceiling of the processing chamber straight down, plasma leakage is controlled by adjusting a distance between the each magnet pillar and the at least one of the plurality of gas exhaust holes, the magnet pillars are divided into at least two different magnet pillar sets including a first magnet pillar set and a second magnet pillar set, and the first magnet pillar set and the second magnet pillar set are configured to be independently movable, the first magnet pillar set is installed at a peripheral portion of the shower head and the second magnet pillar set is installed at a central portion of the shower head, and a length of each magnet pillar included in the first magnet pillar set is shorter than a length of each magnet pillar included in the second magnet pillar set.