Magnetic sensor and a method and device for mapping the magnetic field or magnetic field sensitivity of a recording head
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United States of America Patent
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Dec 5, 2017
Grant Date -
Oct 25, 2012
app pub date -
May 10, 2012
filing date -
Nov 18, 2010
priority date (Note) -
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Abstract
The invention provides a method and apparatus for scanning a read/write head of a hard disk drive during manufacture. The method comprises: providing a magnetic sensor; moving the magnetic sensor relative to and in close proximity to the read/write head under test; obtaining measurements from the head under test or the sensor, representing a two-dimensional magnetic map; processing the map to obtain an accurate map of the head sensitivity of the head under test from which the key performance characteristics of the head can be obtained.
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