Patent ID: 8652310

Claim:
A cylindrical magnetron sputtering apparatus comprising: a rotating cylindrical sputtering target; a non-rotating magnet structure extending longitudinally within the rotating cylindrical sputtering target, the magnet structure including a central main magnet having a first polarity operably producing a flux substantially perpendicular to the target, and the magnet structure further including end magnets individually at opposing longitudinal ends of the main magnet and each having a second polarity that is substantially perpendicular to the first polarity; and at least one trim magnet supported end-to-end with the non-rotating magnet structure and longitudinally alignable with the non-rotating magnet structure so that a longitudinal axis of the trim magnet is substantially coextensive with a longitudinal axis of the non-rotating magnet structure, the trim magnet having a third polarity that is substantially opposite the second polarity of the respective adjacent end magnet.