Western Digital Technologies, Inc.

Hitachi Global Storage Technologies Netherlands B.v.

Western Digital (fremont), Inc.

Sandisk Technologies Inc.

Hgst Netherlands, B.v.

Hitachi Global Technologies Netherlands B.v.

Changqing Shi

Lijie Guan

Ming Jiang

Terence T Lam

Suping Song

Zhigang Bai

Yaguang Wei

Venkatesh Chembrolu

Supradeep Narayana

Jian-Gang Zhu

Michael Kuok San Ho

Anna Zheng

Vladimir Nikitin

Wen-Chien David Hsiao

Youfeng Zheng

Terence Tin-Lok Lam

Muhammad Asif Bashir

Xinjiang Shen

Kuok San Ho

Edward Hin Pong Lee

Zhanjie Li

Yimin Hsu

Petrus Antonius Van Der Heijden

Yun-Fei Li

Hung-Chin Guthrie

Yufeng Hu

Steven C Rudy

Alexander M Taratorin

Quan-chiu Harry Lam

Yansheng Luo

Mark D Moravec

Michael Ho

Xiaoyu Sui

Nurul Amin

Eric R McKie

Sue Siyang Zhang

Ying Hong

Savas Gider

Guanghong Luo

Tsung Yuan Chen

Danning Yang

Samuel Weisan Yuan

Jinwen Wang

David D Terrill

David Kaimon Lee

Michael Kouk San Ho

Jimmy Wong

A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.

Magnetic head with assisted magnetic recording comprising an electrically conductive, non-magnetic material

A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes first and second electrically conductive, non-magnetic material layers. The spin torque oscillator stack is coupled to the first electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.

Magnetic head with assisted magnetic recording

The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole, an EAMR stack disposed on the main pole, and a trailing shield disposed on the EAMR stack. The EAMR stack comprises a seed layer disposed on the main pole, a spin torque layer disposed on the seed layer, and a spacer layer disposed on the spin torque layer. At least one surface of the spacer layer in contact with the spin torque layer has a smaller or reduced area than the spin torque layer. The at least one surface of the spacer layer in contact with the spin torque layer is recessed from a media facing surface and has a smaller cross-track width than the spin torque layer and a smaller width in the stripe height direction than the spin torque layer.

Energy assisted magnetic recording head having improved areal density capability

Embodiments of the present disclosure generally relate to magnetic recording systems, and more particularly to a magnetic recording system with a current-assisted write head. The write head comprises a main pole, a trailing shield disposed above the main pole, a trailing gap disposed between the main pole and the trailing shield, a side shield surrounding three sides of the main pole, the side shield being in contact with and disposed below the trailing shield and the trailing gap, and a side gap disposed between the side shield and each of the three sides of the main pole. The side gap comprises a non-magnetic electrically-conducting material to dissipate heat away from the main pole, lowering the resistance and temperature rise due to heating. The trailing gap may further comprise a non-magnetic electrically-conducting material. The write head may have a two terminal or three terminal connection configuration.

Write heads having conducting side gap for directing current

Embodiments of the present disclosure generally relate to a magnetic recording device comprising a magnetic recording head having a negative anisotropic magnetic (&#x2212;Ku) material notch. The magnetic recording device comprises a main pole disposed at a media facing surface (MFS), a trailing shield disposed adjacent to the main pole, and a trailing gap disposed between the main pole and the trailing shield. The trailing shield comprises a hot seed layer disposed adjacent to the trailing gap, and a notch comprising a &#x2212;Ku material in contact with the hot seed layer and the trailing gap. The notch is disposed adjacent to a first surface of the main pole at the MFS. The notch comprising the &#x2212;Ku material results in an increased effective write magnetic field, an increased down-track field gradient due to reduced shunting from the main pole to the trailing shield, leading to an increased areal density capacity.

Area density capacity improvement with negative anisotropic magnetic material trailing shield notch

The present disclosure is generally related to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole extending to a media facing surface (MFS). The main pole has a gradually increasing cross-section area with a low aspect ratio from the MFS to a surface recessed from and parallel to the MFS. The main pole comprises a first leading edge taper angle (LETA), a second LETA less than the first LETA, a first trailing edge taper angle (TETA), and a second TETA less than the first TETA. The main pole further comprises a first flare recessed a first distance from the MFS, the first flare having a first angle, and a second flare recessed a second distance from the MFS greater than the first distance, the second flare having a second angle greater than the first angle.

Magnetic recording head soft error rate improvement with compact main pole

A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.

Magnetic head with assisted magnetic recording and method of making thereof

A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.

Magnetic recording write head with selected write gap current direction for minimization of cross-track interference

Magnetic head with current assisted magnetic recording and method of making thereof

Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to storage devices employing an energy-assisted magnetic recording write head. The write head may comprise a main pole, a trailing shield, a conducting gap disposed between the main pole and the trailing shield, and one or more current blockers. The conducting gap may be conformal with the main pole. The one or more current blockers may be configured to direct the current from the main pole to the trailing shield through the conducting gap. The one or more current blockers may be further configured to recess the conducting gap away from the media facing surface. The one or more current blockers may be configured to direct the current away from a media facing surface of the write head.

Write heads configured to redirect current

Growing community of inventors

San Ramon, CA, United States of America

Changqing Shi