Patent ID: 9378934
Filing Date: 2016-06-28
CPC Classification: H01J

Claim Text:
1. A racetrack-shaped magnetic-field-generating apparatus for generating a magnetic field on a target surface for magnetron sputtering, comprising a center magnetic pole member comprising a soft-magnetic material; a peripheral magnetic pole member surrounding said center magnetic pole member; pluralities of permanent magnets arranged between said center magnetic pole member and said peripheral magnetic pole member with one magnetic pole opposing said center magnetic pole member and the other magnetic pole opposing said peripheral magnetic pole member; and a non-magnetic base member supporting said center magnetic pole member, said peripheral magnetic pole member and said permanent magnets; said racetrack shape having a linear portion and corner portions; each permanent magnet arranged at least in said linear portion having a magnetic pole surface opposing said center magnetic pole member, which has a magnetization direction inclined away from said target; each permanent magnet arranged at least in said linear portion having a magnetic pole surface opposing said peripheral magnetic pole member, which has a portion not in contact with said peripheral magnetic pole member on a closer side to said base member; and the distance between said center magnetic pole member and said target being the same as the distance between said peripheral magnetic pole member and said target, wherein the inclination angle of said permanent magnets arranged in said linear portion is 5-45° relative to said target and is stationary.