Patent ID: 6792889
Filing Date: 2004-09-21
Classification: H01J

Abstract:
A plasma processing apparatus, comprising:an electrode pair of a plasma excitation electrode for forming a plasma and a susceptor electrode facing the plasma excitation electrode, a workpiece to be plasma-treated being placed therebetween; a plasma processing chamber accommodating the electrode pair; an RF generator; a feeding path for feeding RF power from the RF generator to the plasma excitation electrode; an impedance matching circuit placed in the feeding path, wherein the impedance matching circuit matches the impedance between the RF generator and the plasma processing chamber; a chassis accommodating the impedance matching circuit, wherein the chassis functions as part of a return path from the susceptor electrode to the RF generator; and current-detecting means for detecting an RF current which returns from the susceptor electrode to the RF generator, the current-detecting means being provided in the chassis.