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Magnetic core including magnet for magnetic bias and inductor component using the same

  • US 6,906,608 B2
  • Filed: 05/11/2004
  • Issued: 06/14/2005
  • Est. Priority Date: 11/30/2000
  • Status: Expired due to Term
First Claim
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1. An inductor component comprising:

  • a magnetic core having at least one magnetic gap, each of which has a gap length of about 50 to 10,000 μ

    m in a magnetic path;

    a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap; and

    a coil having at least one turn applied to the magnetic core, wherein;

    the magnet for magnetic bias is a bonded magnet comprising a resin and a magnet powder dispersed in the resin and having a resistivity of 1 Ω

    ·

    cm or more;

    the magnet powder comprising a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300°

    C. or more, a maximum particle diameter of 150 μ

    m or less, and an average particle diameter of 2 to 50 μ

    m and coated with inorganic glass; and

    the rare-earth magnet powder is selected from the group consisting of a Sm—

    Co magnet powder, Nd—

    Fe—

    B magnet powder, and Sm—

    Fe—

    N magnet powder.

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