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United States of America Patent
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Issued Date -
Mar 7, 2013
app pub date -
Aug 16, 2012
filing date -
Sep 6, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A current sensor includes a magnetoresistance effect element in which a plurality of magnetic detecting portions and a plurality of permanent magnet portions are alternately arranged so as to be in contact with each other. Each magnetic detecting portion is configured to include a ferromagnetic fixed layer whose magnetization direction is substantially fixed and a free magnetic layer whose magnetization direction changes with respect to an external magnetic field. Each permanent magnet portion is configured to include a hard bias layer applying a bias magnetic field to the free magnetic layer. An interval between the adjacent permanent magnet portions is 20 μm to 100 μm.
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