Patent ID: 9380692
Filing Date: 2016-06-28
CPC Classification: H01F,H01J,H05H

Claim Text:
1. An apparatus for film deposition processing, the apparatus comprising: a rotatable magnetic field generator configured to rotate about an axis of rotation in a circle lying in a first plane, the rotatable magnetic field generator further configured on a distal end thereof with an outer circular edge region that overlies an arc of the circle and is the same diameter as the circle, the rotatable magnetic field generator comprising a first base, a first peripheral surface and at least one magnetic element disposed between the first base and the first peripheral surface, and the rotatable magnetic field generator further configured to generate a first magnitude of a magnetic field adjacent to a first circumferential portion of the circle; and a counterbalance magnetic field generator configured to rotate about the axis of rotation in opposition to the rotatable magnetic field generator, the counterbalance magnetic field generator further configured on a distal end thereof with an outer circular edge region that overlies an arc of the circle and is the same diameter as the circle, the counterbalance magnetic field generator comprising a second base, a second peripheral surface and at least one magnetic element disposed between the second base and the second peripheral surface, and the counterbalance magnetic field generator further configured to generate a second magnitude of the magnetic field adjacent to a second circumferential portion of the circle, wherein the rotatable magnetic field generator and the counterbalance magnetic field generator are configured to generate the magnetic field between the first plane and a second plane parallel to the first plane along a diameter of the circle extending from the first circumferential portion to the second circumferential portion, and wherein at least one of the first peripheral surface and the second peripheral surface comprises at least one periphery edge comprising a plurality of protruding edge surfaces and a plurality of gaps disposed between the protruding edge surfaces, each gap being disposed between two adjacent protruding edges along the at least one periphery edge.