ENHANCED CPP READ SENSORS WITH LATERAL SPIN TRANSPORT
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Dec 27, 2007
filing date -
Dec 27, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
CPP read sensors and associated methods of fabrication are described that provide lateral spreading of a sense current along the length of an AFM layer of the read sensor. Winged regions (i.e., extended portions) are added to the layers of a CPP sensor stack to induce lateral spreading of the sense current in the AFM layer. Particularly, the pinned layer and the AFM layer have widths greater than the other layers of the sensor stack. Further, the pinned layer comprises multiple layers of materials, with a first layer of material closer to the AFM layer having a lower conductivity and/or a lower spin dependent scattering asymmetry than the second layer of material.
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