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Embedded coil assembly and method of making

  • US 9,824,811 B2
  • Filed: 12/19/2014
  • Issued: 11/21/2017
  • Est. Priority Date: 12/19/2014
  • Status: Active Grant
First Claim
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1. An embedded coil assembly comprising:

  • an annular metal layer having an upper surface;

    a first plurality of metal pillars arranged in an inner ring on the upper surface of the annular metal layer;

    a second plurality of metal pillars arranged in an intermediate ring on the upper surface of the annular metal layer;

    a third plurality of metal pillars arranged in an outer ring on the upper surface of the annular metal layer;

    a ferrite ring on the upper surface of the annular metal layer between the first plurality of metal pillars and the second plurality of metal pillars;

    a plurality of conductive structures that each connect corresponding ones of the first plurality of metal pillars and the second plurality of metal pillars; and

    an encapsulation layer covering, the ferrite ring, the first and second plurality of metal pillars, at least a portion of the third plurality of metal pillars and at least a portion of the plurality of conductive structures.

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