Patent ID: 7115194

Claim:
A magnetron sputtering apparatus comprising: a vacuum chamber; a target; a cathode holding the target in the vacuum chamber; a substrate; an anode holding the substrate and being located above the cathode so as to face the substrate toward the target on the cathode; a permanent magnet assembly generating a magnetic field and being located under the cathode; and a rotation controller rotating the permanent magnet assembly around an axis with rotation occurring on a center of the target as the axis, the permanent magnet assembly further comprising: a base; a first permanent magnet being fixed on the base in the middle; and a second permanent magnet in a ring shape being fixed in a peripheral area of the base so as to surround the first permanent magnet, wherein a magnetic polarity of the second permanent magnet is inverse with respect to a magnetic polarity of the first permanent magnet, and wherein magnetic field strength of the second permanent magnet is weaker than magnetic field strength of the first permanent magnet, and wherein the permanent magnet assembly is formed such that a plane constituted by a top surface of the first permanent magnet and another top surface of the second permanent magnet is slanted with respect to a surface of the target.