Electrical current as probe for modulation at head-disk interface
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United States of America Patent
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Mar 20, 2012
Grant Date -
Aug 11, 2005
app pub date -
Nov 4, 2004
filing date -
Feb 9, 2004
priority date (Note) -
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Abstract
A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head.
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