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US 8,797,684 B1Granted
Magnetic writer configured for high data rate recording
AssigneeWestern Digital (Fremont), LLC
InventorsUt Tran, Zhigang Bai, Kevin K. Lin
Life of this patent
Estimating the term…
Abstract
A method and system provide a magnetic transducer having an air-bearing surface (ABS). The magnetic transducer includes a write pole and a coil. The write pole has a pole tip and a yoke. The coil energizes the write pole and includes a plurality of turns. A turn of the plurality of turns has a first portion and a second portion. The first portion has a first length in a stripe height direction substantially perpendicular to the ABS. The second portion has a second length in the stripe height direction. The second length is greater than the first length and extends at least to at least one adjacent turn.
Claims18
A magnetic transducer having air-bearing surface (ABS) comprising:
- a write pole having a pole tip and a yoke;
- a coil for energizing the write pole and including a plurality of turns, a turn of the plurality of turns having a first portion and a second portion, the first portion having a first length in a stripe height direction substantially perpendicular to the ABS, the second portion having a second length in the stripe height direction, the second length being greater than the first length and extending to at least one adjacent turn of the plurality of turns;
- and
- an additional coil for energizing the write pole and including an additional plurality of turns, the write pole residing between the additional coil and the coil, an additional turn of the additional plurality of turns having a first additional portion and a second additional portion, the first additional portion having a first additional length in the stripe height direction, the second additional portion having a second additional length in the stripe height direction, the second additional length being greater than the first additional length and extending to at least one adjacent additional turn of the additional plurality of turns.
1 more element
A magnetic transducer having air-bearing surface (ABS) comprising:
- a write pole including a pole tip and a yoke having a yoke length of not more than 4.5 microns;
- a plurality of coils for energizing the write pole, the plurality of coils including a first coil and a second coil, the first coil including a plurality of turns, a turn of the plurality of turns having a first portion and a second portion, the first portion having a first length in a stripe height direction substantially perpendicular to the ABS, the second portion having a second length in the stripe height direction, the second length being greater than the first length and extending to at least one-half way across at least one adjacent turn of the plurality of turns in the stripe height direction, the second coil including an additional plurality of turns, the write pole residing between the second coil and the first coil, an additional turn of the additional plurality of turns having a first additional portion and a second additional portion, the first additional portion having a first additional length in the stripe height direction, the second additional portion having a second additional length in the stripe height direction, the second additional length being greater than the first additional length and extending to at least one-half way across at least one adjacent additional turn of the additional plurality of turns;
- a one-piece shield proximate to the ABS, the first coil residing between a portion of the one-piece shield and the write pole;
- an aluminum oxide insulator for electrically insulating the first coil from the write pole and one the plurality of turns from another of the plurality of turns.
1 more element
A disk drive comprising:
- a media,
- a slider, and
- a magnetic transducer coupled with the slider, the magnetic transducer having air-bearing surface (ABS), a write pole, a coil for energizing the write pole and an additional coil, the write pole having a pole tip and a yoke, the coil including a plurality of turns, a turn of the plurality of turns having a first portion and a second portion, the first portion having a first length in a stripe height direction substantially perpendicular to the ABS, the second portion having a second length in the stripe height direction, the second length being greater than the first length and extending to at least one adjacent turn of the plurality of turns, the additional coil for energizing the write pole and including an additional plurality of turns, the write pole residing between the additional coil and the coil, an additional turn of the additional plurality of turns having a first additional portion and a second additional portion, the first additional portion having a first additional length in the stripe height direction, the second additional portion having a second additional length in the stripe height direction, the second additional length being greater than the first additional length and extending at least to at least one adjacent additional turn of the additional plurality of turns.
Dependencies are inferred from the claim text.