Patent ID: 6750614
Filing Date: 2004-06-15
Classification: H01J

Abstract:
A plasma processing apparatus comprising:a plasma processing chamber that accommodates an electrode pair of a plasma excitation electrode for exciting plasma and a susceptor electrode facing the plasma excitation electrode, a workpiece to be plasma-treated being placed therebetween; and a chassis that accommodates an impedance matching circuit, provided in the middle of a supply path for feeding RF power from an RF generator to the plasma excitation electrode, for matching the impedance between the RF generator and the plasma processing chamber, the chassis serving as a return path from the susceptor electrode to the RF generator and further comprising adjusting means for making the chassis impedances axisymmetric about the central axis of the chassis; wherein, in the return path in the chassis, impedances are axisymmetrically equal at a predetermined frequency of the RF power with respect to the direction of a current returning to the RF generator.