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US 2018/0268847 A1Published application
Stripe height lapping control structures for a multiple sensor array
AssigneeWestern Digital (Fremont), LLC
InventorsSteven C. RUDY, Christopher L. BEAUDRY, Shaoping LI
Life of this patent
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Abstract
A method and system provide a storage device. A plurality of read sensor stacks for each reader of the storage device are provided. The read sensor stacks are distributed along a down track direction and offset in a cross-track direction. A plurality of electronic lapping guides (ELGs) are provided for the read sensor stacks. The read sensor stacks are lapped. Lapping is terminated based on signal(s) from the ELG(s).
Claims20
A magnetic read transducer comprising:
- a plurality of read sensors separated from one another in a down track direction, wherein each of the plurality of read sensors is offset from one another in a cross track direction that is perpendicular to the down track direction;
- and
- an internal magnetic shield between two adjacent ones of the plurality of read sensors, wherein the internal magnetic shield is configured to magnetically shield and electrically isolate the plurality of read sensors.
A magnetic read transducer comprising:
- a first read sensor;
- a second read sensor;
- a third read sensor;
- a first internal magnetic shield between the first read sensor and the second read sensor;
- and
- a second internal magnetic shield between the second read sensor and the third read sensor,
- wherein the first read sensor and the second read sensor are separated by a first distance in a down track direction and the second read sensor and the third read sensor are separated by a second distance in the down track direction;
- and
- wherein the first read sensor, the second read sensor, and the third read sensor are offset from one another in a cross track direction that is perpendicular to the down track direction.
6 more elements
A magnetic sensor comprising:
- a plurality of read sensors separated from one another in a down track direction and offset in a cross track direction that is perpendicular to the down track direction;
- a plurality of electronic lapping guides associated with the plurality of read sensors;
- and
- an internal magnetic shield separating each of the plurality of read sensors from an adjacent one of the plurality of read sensors,
- wherein the internal magnetic shield comprises first and second magnetic layers separated by one or more insulating layers.
2 more elements
A magnetic read transducer comprising:
- means for sensing data from a magnetic media;
- means for magnetically shielding and electrically isolating the means for sensing data;
- and
- means for controlling lapping of the magnetic read transducer for obtaining a desired stripe height of the means for sensing data,
- wherein the means for controlling lapping is electrically connected to electrical pads through vias for measuring a target resistance of the means for controlling lapping;
- and
- wherein the stripe height of the means for sensing data is based upon the target resistance.
4 more elements
Dependencies are inferred from the claim text.