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Integrated transformer

  • US 6,870,456 B2
  • Filed: 05/11/2001
  • Issued: 03/22/2005
  • Est. Priority Date: 11/23/1999
  • Status: Expired due to Term
First Claim
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1. A transformer comprising:

  • a substrate comprising a semiconductor material;

    a first conductor over the substrate, the first conductor defining a generally spiral-shaped signal path having at least one turn;

    a second conductor over the substrate, the second conductor defining a generally spiral-shaped signal path having at least one turn; and

    a first magnetic layer between the substrate and the first conductor, and a second magnetic layer between the first conductor and the second conductor, wherein the first magnetic layer is coupled to the second magnetic layer.

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