Patent ID: 10074519

Abstract:
Provided is a plasma processing apparatus in which an external circuit is electrically connected, via a line, to a predetermined electric member within a processing container thereof, and noises of first and second high frequency waves are attenuated or blocked by a filter provided on the line when the noises enter the line from the electric member toward the external circuit. The filter includes: an air core coil provided at a first stage when viewed from the electric member side; a toroidal coil connected in series with the air core coil; an electroconductive casing configured to accommodate or enclose the air core coil and the toroidal coil; a first condenser electrically connected between a connection point between the air core coil and the toroidal coil and the casing; and a second condenser connected between a terminal of the toroidal coil at the external circuit side and the casing.