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Embedded toroidal transformers in ceramic substrates

  • US 7,196,607 B2
  • Filed: 03/26/2004
  • Issued: 03/27/2007
  • Est. Priority Date: 03/26/2004
  • Status: Active Grant
First Claim
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1. A transformer embedded in an LTCC substrate, comprising:

  • a ceramic substrate comprised of a plurality of ceramic tape layers;

    at least a first one of said ceramic tape layers layered between a plurality of second ceramic tape layers, said first ceramic tape layer having a larger permeability value as compared to said second ceramic tape layers;

    andat least one conductive coil disposed within said plurality of ceramic tape layers, said conductive coil in the shape of a toroid having a central axis oriented transverse to said tape layers, and comprising a plurality of turns about a region which defines a ceramic toroidal core, wherein said ceramic toroidal core is intersected by said first ceramic tape layer.

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