Data storage device calibrating fly height actuator based on laser power for heat assisted magnetic recording
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United States of America Patent
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Sep 1, 2015
Grant Date -
N/A
app pub date -
Dec 19, 2014
filing date -
Apr 15, 2014
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Abstract
A data storage device is disclosed comprising a disk, a head comprising a laser, and a fly height actuator (FHA) configured to actuate the head vertically over the disk based on an FHA setting. A first fly height of the head is measured at a first laser power setting, and a second fly height of the head is measured at a second laser power. A FHA write setting is generated based on a calibrated write laser power, the first and second fly height measurements, and a first function representing a nominal FHA delta setting between a read touchdown FHA setting and a write touchdown FHA setting relative to a delta in a fly height of the head due to a corresponding change in laser power applied to the laser, where the FHA write setting is applied to the FHA during the write operation.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- WESTERN DIGITAL TECHNOLOGIES, INC.
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Chia, Galvin T | Rancho Santa Margarita, US | 13 | 373 |
Ruan, Huanxiang | Irvine, US | 9 | 215 |
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