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US 9,626,989 B1Granted
Selective powering techniques for heat assisted magnetic recording
AssigneeSeagate Technology LLC
InventorsBruce Buch, Wenzhong Zhu
Life of this patent
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Abstract
A heat-assisted magnetic recording (HAMR) device includes transducer head comprising a heat source and a writer. The HAMR device further includes a power controller configured to selectively power on and off the heat source independent of current flowing through a write coil of the writer based on a position of the transducer head relative to an adjacent rotating media.
Claims17
A heat-assisted magnetic recording (HAMR) storage device comprising:
- a power controller configured to selectively power on and off a heat source independent of a write coil in a transducer head and based on a relative alignment between the transducer head and a position of interest on a rotating storage medium, wherein selectively powering off the heat source entails stopping a flow of current to the heat source while allowing current to flow through the write coil.
A method comprising:
- selectively powering off a heat source of a heat assisted magnetic recording (HAMR) head while performing a timing synchronization calibration;
- and
- exciting a writer of the HAMR head while the heat source is powered off.
A heat-assisted magnetic recording (HAMR) device comprising:
- a transducer head having a heat source and a writer with a write coil;
- a power controller configured to selectively power on and off the heat source independent of current flowing through the write coil based on a position of the transducer head relative to a bit patterned medium, wherein the power controller selectively powers off the heat source while allowing current to flow through the write coil when the writer is aligned with a quiet field on the bit patterned medium.
Dependencies are inferred from the claim text.