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Magnetoresistance sensor with reduced side reading

  • US 6,785,103 B2
  • Filed: 04/12/2002
  • Issued: 08/31/2004
  • Est. Priority Date: 04/12/2002
  • Status: Expired due to Fees
First Claim
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1. A magnetoresistance sensor comprising:

  • a substrate;

    a sensor structure overlying the substrate and having a lateral side, the sensor structure comprising;

    a layered transverse biasing structure; and

    a free layer contacting the layered transverse biasing structure, the free layering having;

    a central portion that is magnetically free to respond to an external magnetic field; and

    a side portion extending toward the central portion from the lateral side and which is magnetically pinned so that it is not free to respond to the external magnetic field; and

    a longitudinal hard biasing structure contacting at least the lateral side of the sensor structure; and

    wherein the side portion of the free layer has a width exceeding about 0.05 micrometers.

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