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TUNNELING MAGNETIC SENSING ELEMENT AND METHOD FOR PRODUCING SAME

  • US 20080225443A1
  • Filed: 02/25/2008
  • Published: 09/18/2008
  • Est. Priority Date: 03/14/2007
  • Status: Active Grant
First Claim
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1. A tunneling magnetic sensing element comprising:

  • a pinned magnetic layer;

    an insulating barrier layer; and

    a free magnetic layer, the insulating layer being disposed between the pinned magnetic layer and the free magnetic layer;

    wherein the insulating barrier layer is composed of Mg—

    O, andwherein the free magnetic layer has a first magnetic region and a second magnetic region, the first magnetic region is in contact with the insulating barrier layer, located between the second magnetic region and the insulating barrier layer, and composed of Co—

    Fe or Fe, and the second magnetic region is remote from the insulating barrier layer, in contact with the first magnetic region, and composed of Co—

    Fe—

    B or Fe—

    B.

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