Head-medium contact sensor cleaning for heat-assisted magnetic recording device
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United States of America Patent
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Jan 23, 2018
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app pub date -
Feb 14, 2017
filing date -
Mar 4, 2016
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Abstract
A slider is configured for heat-assisted magnetic recording to a magnetic recording medium. A low- or non-modulation interface is defined between the slider and the medium. A contaminant is present on the slider and between the slider and the medium. A controller is configured to control the slider to dislodge the contaminant from the slider by performing modulation-based contact detection at a location of the medium where modulation-based contact detection can accurately detect head-medium contact. The controller is also configured to perform friction-based contact detection using the slider devoid of the contaminant.
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