Seagate Technology Incorporated

Harry Sam Edelman

Victor Sapozhnikov

Declan Macken

Daniel Paul Burbank

Eric Leroy Granstrom

Thomas Roy Boonstra

Mohammed Sharia Ullah Patwari

Bradley Hugh Miller

Kaizhong Gao

Mourad Benakli

Mark Thomas Kief

Kirill A Rivkin

Jason Bryce Gadbois

Joel William Hoehn

Mohammed Shariat Ullah Patwari

Kristin Joy Duxstad

Alan Biggar Johnston

Arkajyoti Misra

David Christopher Seets

Xifeng Han

Cyril Peter DeVries

A writer includes a leading edge, a trailing edge, a longitudinal axis defined between the leading and trailing edges, and a transverse axis orthogonal to the longitudinal axis. A writer region is provided at a protruded section of the trailing edge oriented along the longitudinal axis. A write pole is arranged at the protruded section to write data to two locations spaced apart from one another relative to the transverse axis for a range of skew angles.

Writer with protruded section at trailing edge

A read head includes a bottom shield configured as a bottom electrical contact. A bottom reader stack is disposed on and electrically coupled to the bottom shield. A middle electrical contact is electrically coupled to a top layer of the bottom reader stack. A top reader stack is disposed on the bottom reader stack. A bottom layer of the top reader stack electrically coupled to the middle electrical contact. A top shield is configured as a top electrical contact. The top shield is disposed on and electrically coupled to the top reader stack.

Read head with multiple reader stacks

Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack separated by a top mid-shield and a bottom mid-shield, and a pre-amplifier circuit comprising a top lead connected to the top mid-shield, configured to collect current flowing from the top mid-shield through the top sensor stack opposite a direction of current flowing from the bottom mid-shield to a bottom lead through the bottom sensor stack.

Dual reader structure

Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack wherein the bottom sensor stack and the top sensor stack are mirrored along a down-track direction.

Implementations described and claimed herein provide a synthetic antiferromagnetic (SAF) layer with canted pinning, wherein a down-track direction facing surface of the SAF layer has edges that are substantially parallel to pinning direction of the SAF layer.

Reader structure with canted pinning

An apparatus for two dimensional reading may be constructed, in accordance with some embodiments, with a number of magnetic stacks respectively configured to engage adjacent data tracks of a data storage media. Each magnetic stack can be disposed between top and bottom shields while each shield is segmented into a number of contacts different than the number of magnetic stacks.

Magnetic stack with separated contacts

Misalignment of a transducer head over a bit-patterned media (BPM) may cause a bit to experience conflicting magnetization forces from the writer, resulting in improperly written data and stored data corruption. The likelihood of data corruption is reduced when a write transition is performed when the write sync margin is increased or maximized. Therefore, a write precompensation system may calculate time shift information for adjusting the timing of an individual write current transition at the transducer that compensates for write sync margin degradation due to any or all of skew angle of the transducer, track misregistration, and write field curvature.

Write precompensation for head misalignment

A data writer may be constructed, in accordance with some embodiments, with a write pole tip that is configured with leading and trailing edges on opposite sides of a tip body. The trailing edge may be shaped by a recess that extends into the tip body towards the leading edge.

Write pole tip with trailing edge recess

Apparatus for two dimensional reading. In accordance with some embodiments, a magnetic read element has a bias magnet disposed between a plurality of read sensors. The bias magnet may be configured to concurrently bias each read sensor to a predetermined magnetization.

Biased two dimensional magnetic sensor

An apparatus that includes a write element including a write element tip having a leading edge, a trailing edge, and first and second side edges connecting the leading edge to the trailing edge, wherein the trailing edge is non-planar; a trailing shield proximate the trailing edge of the write element; a first side shield proximate the first side edge; and a second edge proximate the second side edge.

Apparatus including modified write pole tip

A magnetic sensing device includes a first electrode, a second electrode, a first magnetic shield, a second magnetic shield, and a sensor. The first magnetic shield forms at least a portion of the first electrode. The second magnetic shield includes a first region that forms at least a portion of the first electrode and a second region that forms at least a portion of the second electrode. The sensor is positioned between the first and second magnetic shields and is electrically connected in series between the first and second electrodes.

Reader shield/electrode structure

A transducing head includes a substrate, a writer positioned upon the substrate, and a reader positioned adjacent the writer. The writer is in electrical contact with the substrate.

Grounded writer core

Reader shield/electrode structure for improved stray field and electrical performance

A transducing head includes a substrate, a writer having a writer core, and an electrical connector for grounding the writer, wherein the electrical connector electrically connects the writer core to the substrate.

A method of forming a tunneling magnetoresistive head begins by forming a tunneling magnetoresistive stack having a tunnel barrier. An air bearing surface is formed of the tunneling magnetoresistive stack. The air bearing surface is ion etched causing a deficiency of a constituent in a portion of the tunnel barrier adjacent the air bearing surface. The deficiency of the constituent is replenished in the portion of the tunnel barrier adjacent the air bearing surface to restore the electrical properties of the tunnel barrier.

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Minneapolis, MN, United States of America

Harry Sam Edelman