Western Digital (fremont), Inc.

Seagate Technology Incorporated

Micron Technology Incorporated

Western Digital Technologies, Inc.

Other

Sandisk Technologies Inc.

Wd Media, LLC

Shaoping Li

Gerardo Bertero

Kaizhong Gao

Ming Mao

Song Sheng Xue

Theodore Zhu

William L Larson

Harry Liu

Shihai He

Feng Q Liu

Qunwen Leng

Steven C Rudy

Lei Wang

Ge Yi

Yong Lu

Anthony Arrott

Wenzhong Zhu

Yuankai Zheng

Rongfu Xiao

Michael L Mallary

Sining Mao

Patrick Joseph Ryan

Lonny L Berg

Christopher L Beaudry

Haiwen Xi

Xiaobin Wang

Zheng Gao

Yimin Guo

Joel A Drewes

Nurul Amin

Zhihong Zhang

Charles Potter

Yingbo Zhang

Zhigang Bai

Daniele Mauri

Romney R Katti

Ming Sun

Tao Pan

Jinqiu Zhang

Yunfei Ding

Donald Joseph Brunnett

Anup Roy

Yuming Zhou

Chunhong Hou

Dimitar Velikov Dimitrov

Insik Jin

Mark Thomas Kief

Zhitao Diao

Francis H Liu

Konstantin Nikolaev

Zongrong Liu

Laurence Lujun Chen

Ling Wang

Yunjun Tang

Steven Kalderon

Daniel John Brown

Eileen Yan

Enhao Lin

Miaoyin Wang

Michael R Montemorra

Daniel K Lottis

Ga-Lane Chen

Wei Zhang

Kuok San Ho

Yugang Wang

Ut Tran

Taras Grigorievich Pokhil

B Ramamurthy Acharya

Housan Dakroub

Jinshan Li

Lien-Chang Wang

Jason Charles Jury

Dujiang Wan

Chen-jung Chien

Eric Shane Linville

Guanxiong Li

Donghong Li

Ibro Tabakovic

Philip L Steiner

John Wolf

Peng Luo

Ned Tabat

Dehua Han

Eric J Champion

Zhipeng Li

Feng Y Wang

Jinwen Wang

Changhe Shang

Amritpal Singh Rana

Lieping Zhong

Haifeng Wang

Juan Jose Fernandez-de-Castro

Dong Li

Luc Chung

Steven Paul Bozeman

Xuebing Feng

David R Kaiser

Jimmy J Shen

Yiming Shi

Jianxin Fang

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).

Stripe height lapping control structures for a multiple sensor array

Apparatuses, systems, and methods are disclosed for non-volatile memory. A plurality of layers of planar non-volatile memory cells forms a three-dimensional memory array. A plurality of word lines are coupled to planar non-volatile memory cells. Word lines may extend horizontally across layers of memory cells. A plurality of selector columns are coupled to planar non-volatile memory cells. Selector columns extend vertically through layers of memory cells, and may include central conductors surrounded by one or more concentric selective layers. One or more selective layers may permit an electrical current through a cell, between a word line and a central conductor, in response to a voltage satisfying a threshold.

Vertical selector for three-dimensional memory with planar memory cells

A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.

Free layer magnetic reader that may have a reduced shield-to-shield spacing

A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method includes providing a first shield, a first read sensor, an antiferromagnetically coupled (AFC) shield that includes an antiferromagnet, a second read sensor and a second shield. The read sensors are between the first and second shields. The AFC shield is between the read sensors. An optional anneal for the first shield is in a magnetic field at a first angle from the ABS. Anneals for the first and second read sensors are in magnetic fields in desired first and second read sensor bias directions. The AFC shield anneal is in a magnetic field at a third angle from the ABS. The second shield anneal is in a magnetic field at a fifth angle from the ABS. The fifth angle is selected based on a thickness and a desired AFC shield bias direction for the antiferromagnet.

Method for AFC shields for multiple sensor magnetic transducers and magnetic transducers having multiple sensors and AFC shields

A magnetic read apparatus includes a media-facing surface (MFS), a sensor, a shield structure, a side bias structure, and a shield reference bias structure. The sensor includes a free layer and a nonmagnetic layer. The shield structure includes a shield pinning structure and a shield reference structure between the shield pinning structure and the nonmagnetic layer. The nonmagnetic layer is between the free layer and a shield reference structure. The shield pinning structure includes a pinned moment oriented in a first direction. The shield reference structure includes a reference structure moment weakly coupled with the pinned moment. The side bias structure is adjacent to a side of the free layer and biases the free layer in a first direction parallel to the MFS. The shield reference bias structure is adjacent to the shield reference structure and biases the shield reference structure in a direction opposite to the first direction.

Free layer only magnetic reader that may have a reduced shield-to-shield spacing and a multilayer side bias

A tunnel magnetoresistance (TMR) read sensor having a tabbed AFM layer and an extended pinned layer and methods for making the same are provided. The TMR read sensor has an AFM layer recessed from the air bearing surface, providing a reduced shield-to-shield distance.

Magnetic read head with antiferromagentic layer

Apparatuses and methods for providing thin shields in a multiple sensor array are provided. One such apparatus is a magnetic read transducer including a first read sensor, a second read sensor, and a shield assembly positioned between the first read sensor and the second read sensor at an air bearing surface (ABS) of the magnetic read transducer, the shield assembly including a first shield layer assembly having a first footprint with a first area, and a second shield layer assembly having a second footprint with a second area, where the second area is greater than the first area.

Apparatuses and methods for providing thin shields in a multiple sensor array

A magnetic read apparatus includes a first sensor, a shield layer, an insulating layer, a shield structure and a second sensor. The shield layer is between the first sensor and the insulating layer. The shield structure is in the down track direction from the insulating layer. The shield structure includes a magnetic seed structure, a shield pinning structure and a shield reference structure. The magnetic seed structure adjoins the shield pinning structure. The shield pinning structure is between the shield reference structure and the magnetic seed structure. The second sensor includes a free layer and a nonmagnetic spacer layer between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment. The shield reference structure includes another magnetic moment weakly coupled with the pinned magnetic moment.

Magnetic read apparatus having multiple read sensors with reduced sensor spacing usable in two-dimensional magnetic recording applications

A method for providing a storage device that includes a plurality of read sensor stacks for each reader of the storage device. The plurality of 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).

Method for providing a storage device

A magnetic read apparatus has a media-facing surface (MFS) and includes a read sensor, a magnetic bias structure and an insulating layer. The read sensor has a side, a front occupying part of the MFS and a back. The read sensor includes a free layer, a pinned layer and a barrier layer between the free and pinned layers. The barrier layer has a barrier layer coefficient of thermal expansion. The magnetic bias structure is adjacent to the side of the free layer. The insulating layer includes first and second portions. The first portion of the insulating layer is between the read sensor side and the magnetic bias structure. The second portion of the insulating layer adjoins the read sensor back. The insulating layer has an insulating layer coefficient of thermal expansion that is at least &#x2153; of and not more than 5/3 of the barrier layer coefficient of thermal expansion.

Read sensor having an insulating layer capable of use in two-dimensional magnetic recording

A spin transfer torque magnetic junction includes a magnetic reference layer structure with magnetic anisotropy perpendicular to a substrate plane. A laminated magnetic free layer comprises at least three sublayers (e.g. sub-layers of CoFeB, CoPt, FePt, or CoPd) having magnetic anisotropy perpendicular to the substrate plane. Each such sublayer is separated from an adjacent one by a dusting layer (e.g. tantalum). An insulative barrier layer (e.g. MgO) is disposed between the laminated free layer and the magnetic reference layer structure. The spin transfer torque magnetic junction includes conductive base and top electrodes, and a current polarizing structure that has magnetic anisotropy parallel to the substrate plane. In certain embodiments, the current polarizing structure may also include a non-magnetic spacer layer (e.g. MgO, copper, etc).

Spin transfer torque tunneling magnetoresistive device having a laminated free layer with perpendicular magnetic anisotropy

A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic coercivity Hextending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length.

Perpendicular magnetic recording media with magnetic anisotropy gradient and local exchange coupling

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San Ramon, CA, United States of America

Shaoping Li