Fly-height management in a hard disk drive (HDD)
First Claim
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1. A hard disk drive (HDD) comprising:
- a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media, wherein said first RTD is proximate an air bearing surface (ABS) of said slider;
a second RTD configured to detect at least one temperature correlated to a heating of said slider, wherein said second RTD is not required to be proximate said ABS of said slider, anda read/write integrated circuit (IC) configured to determine an origin of an external heat source and cancel said external heat source to measure temperature changes with an origin proximate to said ABS and further configured to determine said fly-height of said slider based on detection of temperatures by said first RTD and said second RTD.
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Abstract
A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air bearing surface (ABS) of the slider. The HDD also includes a second RTD configured to detect at least one temperature correlated to a fly-height of the slider. The second RTD is not required to be proximate the ABS of the slider. HDD also includes a read/write integrated circuit (IC) configured to determine the fly-height of the slider based on detection of temperatures by the first RTD and the second RTD.
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Citations
20 Claims
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1. A hard disk drive (HDD) comprising:
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a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media, wherein said first RTD is proximate an air bearing surface (ABS) of said slider; a second RTD configured to detect at least one temperature correlated to a heating of said slider, wherein said second RTD is not required to be proximate said ABS of said slider, and a read/write integrated circuit (IC) configured to determine an origin of an external heat source and cancel said external heat source to measure temperature changes with an origin proximate to said ABS and further configured to determine said fly-height of said slider based on detection of temperatures by said first RTD and said second RTD. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A slider in a hard disk drive (HDD), comprising:
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a first resistive temperature detector (RTD) configured to detect a temperature generated by slider contact with a media, wherein said first RTD is proximate an air bearing surface (ABS) of a slider; and a second RTD configured to detect at least one temperature correlated to a fly-height of said slider, wherein said second RTD is not required to be proximate said ABS of said slider and wherein said first RTD and said second RTD are configured to determine an origin of an external heat source and cancel said external heat source to measure temperature changes with an origin proximate to said ABS. - View Dependent Claims (9, 10, 11)
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12. A method for fly-height management in a hard disk drive (HDD), said method comprising:
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detecting a change in resistance of a first resistive temperature detector (RTD) in response to a change of temperature of said first RTD generated by slider fly-height changes over a media, wherein said first RTD is proximate an air bearing surface (ABS) of a slider; detecting a change in resistance of a second RTD in response to a change in temperature of said second RTD, wherein said second RTD is not required to be proximate said ABS; determining an origin of an external heat source and canceling said external heat source to measure temperature changes with an origin proximate to said ABS; and determining a fly-height of said slider based on said change of resistance of said first RTD and said change of resistance of said second RTD. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification