Patent ID: 7922865
Filing Date: 2011-04-12
Classification: H01J

Abstract:
1. A magnetic field generator for magnetron plasma generation comprising a first dipole-ring magnet having a plurality of columnar first segment magnets arranged in a ring-like manner and a second dipole-ring magnet having a plurality of columnar second segment magnets arranged in a ring-like manner, wherein the plurality of first and second segment magnets are embedded in a non-magnetic base and are respectively equipped with a spacer, wherein the first dipole-ring magnet is identical in diameter with the second dipole-ring magnet, and the first dipole-ring magnet is arranged such as to be superimposed on the second dipole-ring magnet, and the first segment magnets, provided on one side of the spacer are different in length from the second segment magnets provided on the opposite side of the spacer in the direction of central axis thereof.