Patent ID: 8216421

Claim:
A plasma processing apparatus, comprising: a processing chamber; an object to be processed disposed within the processing chamber; a surrounding member disposed around the processing chamber, the surrounding member sealing the chamber and creating an inner space, the surrounding member including a dielectric member sealing an opening on top of the processing chamber; an RF induction coil disposed outside and above the dielectric member, the entire RF induction coil being disposed above the dielectric member, a first end and a second end of the RF induction coil connected to a matching network; and an RF cut filter connected to a direct current (DC) power supply and connected to the first and second ends of the RF induction coil, the RF cut filter including a first capacitor connected to a positive terminal of the DC power supply and to ground and a second capacitor connected to a negative terminal of the DC power supply and to ground; wherein a direct-current magnetic field is supplied to the inner space by the DC power supply in which a direct current is passed through the RF induction coil to obtain the direct-current magnetic field.