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THIN FILM INDUCTOR WITH EXTENDED YOKES

  • US 20150279546A1
  • Filed: 03/31/2014
  • Published: 10/01/2015
  • Est. Priority Date: 03/31/2014
  • Status: Active Grant
First Claim
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1. A thin film inductor where a stacking direction of the layers of the thin film structure defines a vertical direction, the inductor comprising:

  • a rectangular bottom yoke portion;

    a rectangular top yoke portion;

    a magnetic via zone set including at least a first magnetic via zone and a second magnetic via zone, with each magnetic via zone of the magnetic via zone set being structured, sized, shaped, connected and/or located to form a low magnetic reluctance path between the top yoke portion and the bottom yoke portion; and

    a first current carrier portion;

    wherein;

    the first magnetic via zone and the second magnetic via zone are elongated in an axial direction;

    the first magnetic via zone and the second magnetic via zone are spaced apart in a transverse direction by a distance W;

    at least a portion of the first current carrier portion is located to pass between;

    (i) the top yoke portion and the bottom yoke portion, and (ii) the first via zone and the second via zone;

    the first and second yoke portions, the first current carrier portion and the first set of via zones are located, sized, shaped and/or connected to act as an inductor when current passes through the first current carrier portion;

    each of the top and bottom yoke portions have;

    (i) a first axial end terminating in a first transverse edge, and (ii) a second axial end terminating in a second transverse edge; and

    at least one of the first transverse edge of the top yoke, the second transverse edge of the top yoke, the first transverse edge of the bottom yoke, the second transverse edge of the bottom yoke is spaced apart from the first and second via zones in the axial direction by at least 0.5 times W.

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