Patent ID: 7767064

Claim:
A magnetron system for use adjacent a target in a plasma sputter chamber, comprising: a pivot arm configured for fixing to a rotary shaft extending along a rotation axis; a swing member rotatably mounted on the pivot arm at a pivot axis displaced away from the rotation axis; a first magnetron supported at a first position on the swing member; and a second magnetron having a different configuration than the first magnetron supported at a second position on the swing member, wherein the first magnetron includes an outer first magnetic pole of a first magnetic polarity, having a first total magnetic intensity and an inner second magnetic pole of an second magnetic polarity opposed to the first magnetic polarity, having a second total magnetic intensity, surrounded by the first magnetic pole, and separated therefrom by a first gap; wherein a rotation in one direction of the swing member causes the first magnetron to move away from the rotation axis and the second magnetron to move towards the rotation axis, wherein the second magnetron includes an outer third magnetic pole of a third magnetic polarity, having a third total magnetic intensity and an inner fourth magnetic pole of a fourth magnetic polarity opposed to the third magnetic polarity, having a fourth total magnetic intensity, surrounded by the third magnetic pole, and separated therefrom by a second gap.