Western Digital (fremont), Inc.

Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

Western Digital Technologies, Inc.

Ying Hong

Weimin Si

Feng Q Liu

David John Seagle

Wipul Jayasekara

Zhigang Bai

Ming Jiang

Tao Pan

Jinqiu Zhang

Yun-Fei Li

Satoru Araki

Dehua Han

Yunhe Huang

Jinwen Wang

Lieping Zhong

Wanxue Zeng

Quang Le

Daniele Mauri

Yunfei Li

Chengtao R Yu

Zheng Gao

Kochan Ju

Ching-Huang Lu

Tsann Lin

Lijie Guan

Edward Hin Pong Lee

Ching Hwa Tsang

Xiaoyong Liu

Ming Sun

Yugang Wang

Howard Gordon Zolla

Yunfei Ding

Yan Chen

Lien-Chang Wang

Robert Beach

Marie-Claire Cyrille

Donghong Li

Hai Jiang

Xiaoyu Yang

Jose Antonio Medina

Thomas L Leong

Jian X Shen

Jianxin Fang

Hongzhou Jiang

Masaya Nishioka

Hardayal Singh Gill

Robert Fontana

Cherngye Hwang

Kuok San Ho

James Mac Freitag

Aron Pentek

Zhanjie Li

Stefan Maat

Ming Mao

Yi Zheng

Hong Zhang

Changqing Shi

Hung-Chin Guthrie

Hai Sun

Chih-Ching Hu

Guanghong Luo

Hongping Yuan

John David Westwood

David Patrick Druist

Guanxiong Li

Honglin Zhu

Fenglin Liu

Yukimasa Okada

Lingyun Miao

Yongchul Ahn

Guangli Liu

Laurence Lujun Chen

Yu Lo

Hicham Moulay Sougrati

Jikou Zhou

Ling Wang

Yuan Yao

Timothy James Minvielle

Hongmei Han

Shuxia Wang

Iulica Zana

Bo Zhang

A hybrid read head structure for two-dimensional magnetic recording (TDMR) in a disk drive has two stacked current-perpendicular-to-the plane magnetoresistive (CPP-MR) read heads or sensors substantially aligned with one another in the along-the track direction to enable both sensors to read data from the same data track. The structure is a hybrid structure formed on the disk drive slider with the lower sensor being a dual free layer (DFL) or scissoring type of CPP-MR sensor and the upper sensor being a single free layer (SFL) type of CPP-MR sensor.

Two-dimensional magnetic recording (TDMR) read head structure with different stacked sensors and disk drive incorporating the structure

Various embodiments described herein provide for substrate structures including uniform plating seed layers, and that provide favorable adhesion on dielectric substrate layers. According to some embodiments, a methods for forming a magnetic recording pole is provided comprising: forming an insulator layer; forming a trench in the insulator layer; forming an amorphous seed layer over the insulator layer; forming an adhesion layer over the amorphous seed layer, the adhesion layer comprising a physical vapor deposited (PVD) noble metal; forming a plating seed layer over the adhesion layer, the plating seed layer comprising chemical vapor deposited (CVD) Ru; and forming a magnetic material layer over the plating seed layer.

Methods for improving adhesion on dielectric substrates

A method of forming a wrapped-around shielded perpendicular magnetic recording writer pole is disclosed. A structure comprising a leading shield layer and an intermediate layer disposed over the leading shield layer is provided, the intermediate layer comprising a pole material and a dielectric material. A trench is formed in the dielectric material. A non-magnetic layer in the trench is removed via an ion beam etching process. A seed layer is deposited in the trench and over the pole material. A magnetic material comprising a side shield layer is deposited on at least a portion of the seed layer.

Method of forming a fully wrapped-around shielded PMR writer pole

A method and system for fabricating a magnetic transducer are described. The magnetic transducer includes a pole and a nonmagnetic intermediate layer adjacent to the pole. The pole has a paddle and a pole tip including a plurality of sidewalls. The pole includes a first magnetic pole layer, at least one antiferromagnetic coupling (AFC) structure on the first magnetic pole layer, and a second magnetic pole layer on the AFC structure(s). At least a portion of the first magnetic pole layer resides on the sidewalls of the pole tip. The paddle has a paddle width in a track width direction. The pole tip has a pole tip width in a track width direction that is less than the paddle width.

Method and system for providing an antiferromagnetically coupled writer

A magnetic head including a CPP read head sensor. The CPP sensor includes a tunnel barrier layer. At least one portion of ELG material is coplanar with the tunnel barrier layer.

Magnetic head having a CPP sensor with tunnel barrier layer and ELG material coplanar with the tunnel barrier layer

The embodiments of the present invention relate to a method for forming a magnetic read head with pinned layers extending to the ABS of the read head and magnetically coupled with an antiferromagnetic layer that is recessed in relation to the ABS of the read head. Portions of the antiferromagnetic layer and a magnetic layer that are extending to the ABS are removed, exposing a shield. A shielding material is formed on the exposed shield and a seed layer is formed on the shield and on or over a portion of the remaining antiferromagnetic layer. A pinned layer structure is formed on the seed layer and the magnetic layer.

Recessed IRMN reader process

A magnetic read sensor having a magnetic seed layer, a pinned layer structure formed over the magnetic seed layer, a non-magnetic barrier or spacer layer formed over the pinned layer structure and a magnetic free layer structure formed over the non-magnetic barrier or spacer layer. The pinned layer has a stripe height (measured from the media facing surface) that is greater than a stripe height of the magnetic free layer structure. In addition, the magnetic seed layer structure has a stripe height (also measured from the media facing surface) that is greater than the stripe height of the magnetic pinned layer structure and the magnetic free layer structure. The stripe height of the magnetic seed layer structure can be controlled independently of the stripe heights of the magnetic pinned layer structure and the magnetic free layer structure.

Magnetic read sensor with independently extended pinned layer and seed layer

A magnetic sensor having a first sensor stack portion that includes a free layer, non-magnetic spacer or barrier layer and a portion of a pinned layer structure. The sensor has second sensor stack portion formed over the first sensor stack portion. The second sensor stack portion include includes a second portion of the pinned layer structure and a layer of antiferromagnetic material formed over the. The first sensor stack portion is configured with a width and stripe height that define the functional width and strip height of the sensor, whereas the upper portion can be made wider and deeper without affecting sensor performance. Because the patterning of the first sensor stack portion is performed on a thinner structure than would be necessary to pattern the entire sensor stack, the patterning can be performed with smaller dimensions and increased resolution.

Magnetic sensor having narrow trackwidth and small read gap

A method and system for providing a touchdown sensor for use in disk drive is described. The touchdown sensor includes a seed layer, a sensor layer on the seed layer, and a capping layer. The sensor layer includes NiFe. In some embodiments, at least one of the seed layer and the capping layer promote stability and performance of the sensor layer.

Touchdown sensor having a more stable crystal structure for use in hard disk drives

A magnetic read sensor having an antiferromagnetic located embedded within a magnetic shield of the sensor so that the antiferromagnetic layer can pin the magnetization of the pinned layer without contributing to read gap thickness. The sensor is configured with a pinned layer having a free layer structure located within an active area of the sensor and a pinned layer that extends beyond the free layer and active area of the sensor. The antiferromagnetic layer can be located outside of the active and exchange coupled with the extended portion of the pinned layer.

Magnetic sensor with recessed AFM shape enhanced pinning and soft magnetic bias

A method and system for fabricating magnetic transducer are described. The method and system include providing a main pole having a bottom and a top wider than the bottom. The method and system further include performing a high energy ion mill at an angle from a normal to the top of the main pole and at a first energy. The high energy ion mill removes a portion of the top of the main pole and exposes a top bevel surface for the main pole. The method and system also include performing a low energy ion mill at second energy and a glancing angle from the top bevel surface. The glancing angle is not more than fifteen degrees. The second energy is less than the first energy. The method and system also include depositing a nonmagnetic gap.

Method and system for providing a perpendicular magnetic recording transducer using a low energy mill

A method and system provide a touchdown sensor for use in disk drive. The touchdown sensor includes a sensor layer including a plurality of magnetic layers interleaved with at least one nonmagnetic layer. The plurality of magnetic layers are magnetically coupled and single domain. Further, the sensor has a temperature coefficient of resistivity (TCR) of at least 0.15%/&#xb0; C.

Laminated touchdown sensor for hard disk drives

A transducer according to one embodiment comprises a first ferromagnetic layer; a second ferromagnetic layer; and an electrically conductive layer positioned between the ferromagnetic layers; wherein a length of the first ferromagnetic layer in a first direction parallel to a plane of deposition thereof is greater than a length of the electrically conductive layer in the first direction such that a first end of the first ferromagnetic layer extends beyond an end of the electrically conductive layer in the first direction, wherein an electrical current enters or exits the end of the first ferromagnetic layer that extends beyond the end of the electrically conductive layer in the first direction. Additional transducer structures, and systems implementing such transducers, are also disclosed.

Read transducer and magnetic storage system implementing same

A magnetic recording transducer comprises a main pole having a bottom, a top wider than the bottom, and a top bevel. The transducer further comprises a nonmagnetic gap covering the main pole, a portion of the nonmagnetic gap residing on the top of the main pole, a first seed layer, at least a portion of the first seed layer covering the portion of the nonmagnetic gap on top of the main pole, a second seed layer residing on the first seed layer, and a wrap-around shield on the second seed layer.

System for providing a perpendicular magnetic recording transducer using a split seed layer

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Morgan Hill, CA, United States of America

Ying Hong