| 摘要 |
Provided are a magnet structure and the like capable of changing a magnetic force line distribution on a surface of a target to thereby achieve wide erosion of a target, using a simple drive mechanism. A magnet structure (110) comprises a main magnet (10, 13) disposed at a reverse surface (20B) side of a target (20) to produce a main magnetic force line reaching an obverse surface (20A) of the target, an adjustment magnet (11) disposed at the reverse surface (20B) side of the target (20) to produce an adjustment magnetic force line for changing a magnetic flux density distribution produced by the main magnetic force line, a magnetic path (21A, 21B, 24) of the adjustment magnetic force line which is disposed at the reverse surface (20B) side of the target 20, and a magnetic field adjustment means (12, 14) configured to be able to change strength of the adjustment magnetic force line passing through inside of the magnetic path (21A, 21B, 24).
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