Abstract

In a planar magnetron cathode, a disk target shows an erosion ring at the central region of the target. It was found that the grounded permalloy sheet which covered the outer surface of the magnetron cathode confined the magnetic leakage flux and enhanced the transverse magnetic field at the outer region of the target. The additional erosion ring was observed at the outer region. The total amount of the sputtered substance increased by 4 times. The grounded permalloy sheet will provide a compact magnetron cathode with a controlled erosion pattern.

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