Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

Western Digital Technologies, Inc.

Hitachi Global Storage Technologies

Hitachi Global Storage Technologies B.v.

Hitachi Gobal Storage Technologies Inc.

Aron Pentek

Yi Zheng

Wen-Chien David Hsiao

Sue Siyang Zhang

Quang Le

Vladimir Nikitin

Ming Jiang

Amanda Baer

Yimin Hsu

Hung-Chin Guthrie

Edward Hin Pong Lee

Daniel Wayne Bedell

Michael R Feldbaum

Donald Giles Allen

Katalin Pentek

Liubo Hong

Hamid Balamane

Mason Lamar Williams

Yinshi Liu

Jeffrey Scott Lille

Jyh-Shuey Jerry Lo

Honglin Zhu

Gautam Khera

Thomas J A Roucoux

Neil Leslie Robertson

Alexander Goncharov

Muhammad Asif Bashir

James Lamar Nix

Walter Eugene Weresin

Venkata R K Gorantla

Terence T L Lam

Zhigang Bai

Kim Yang Lee

Takuya Matsumoto

Hugo Alberto Emilio Santini

Yunfei Ding

Ning Shi

Nian Xiang Sun

Yongchul Ahn

Guomin Mao

Christian Rene Bonhote

Yansheng Luo

John I Kim

Hieu Lam

Sanford J Lewis

Aaron Neuhaus

Thomas Roucoux

Prabodh Ratnaparkhi

Galina Moutchaidze

Zheng Gao

Son Van Nguyen

David John Seagle

James Mac Freitag

Neil Smith

Yingjian Chen

Murali Ramasubramanian

Na Young Kim

Kurt A Rubin

Simon H Liao

Jing Zhang

Petrus Antonius Van Der Heijden

Wipul Jayasekara

Howard Gordon Zolla

Jui-lung Li

Ying Hong

Douglas Johnson Werner

Susumu Okamura

James Terrence Olson

Tsung Yuan Chen

David Patrick Druist

Venkatesh Chembrolu

Quan-chiu Harry Lam

Xiaoye Zhao

Xiaozhong Dang

Fenglin Liu

Guangli Liu

Trevor W Olson

Andrew Chiu

Yuming Zhou

Kyusik Shin

John Jaekoyun Yang

Mason L Williams, Iii

Mary Kathryn Gutberlet

Thao Pham

Thomas L Leong

Qiping Zhong

Jennifer Ai-Ming Leung

Yunxiao Gao

Edward H P Lee

Christian René Bonhôte

Tom King Harris, Iii

Christian R Bonhôte

Satyanarayana Myneni

Hamid Balamame

Clarence Kai-Sheng Hsieh

Alan J Tam

Yvette Winton

Petrus Antonius Van Der Hemden

Jennifer A Loo

Jerry Lo

The present disclosure generally relates to a magnetic recording system comprising a magnetic recording head that provides a low resistance cross-track current path at the trailing side of the main pole. A bias current may be driven through the path to enhance the magnetic write field to the magnetic recording media. The current is driven by an alternating current (AC) source external to the head. In some embodiments, the cross-track current going through the low resistance path enables high amounts of current to be utilized without break down of the magnetic recording head.

Magnetic recording head with a cross-track current flow in a low resistance path

The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a current flow in a cross-track direction around a main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the main pole and the trailing shield. A hot seed layer is disposed between the trailing gap and the trailing shield. A first insulation layer is disposed between the hot seed layer and the trailing shield, where the first insulation layer contacts the side shields. A second insulation layer is disposed between the main pole and leading shield, where the second insulation layer contacts the side shields. The first and second insulation layers direct the current through the side shields and across the main pole in a cross-track direction.

Cross track current design for energy 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, a hot seed layer, and a write assist stack disposed between the main pole and the hot seed layer. In one embodiment, the write assist stack comprises a seed layer, a spin torque layer, and a notch layer. One or more of the seed layer and the notch layer have a first cross-track width and the spin torque layer has a second cross-track width less than the first cross track width. In another embodiment, the write assist stack comprises a seed layer, a spin polarization layer, and a notch layer. One or more of the seed layer and the notch layer have a first cross-track width and the spin polarization layer has a second cross-track width less than the first cross track width.

Write assist stack to reduce resistance and improve reliability

In one embodiment, a write head includes a spin polarization layer (SPL) over a seed layer. A spacer layer is over the SPL. A trailing shield is over the spacer layer. The spacer layer forms a first interface between the spacer layer and the trailing shield and forms a second interface between the spacer layer and the SPL. The first interface has an area larger than an area of the second interface. In another embodiment, a write head includes a SPL over a spacer layer. A capping layer is over the SPL. A trailing shield is over the capping layer. The spacer layer forms a first interface between the spacer layer and the main pole and forms a second interface between the spacer layer and the SPL. The first interface has an area larger than an area of the second interface.

Spintronic devices with narrow spin polarization layers

A magnetic write head for heat assisted magnetic recording having a novel heat sink structure. The write head includes a magnetic write pole and a thermal transducer located adjacent to a leading edge of the magnetic write pole. A heat sink structure, constructed of a non-magnetic, thermally conductive material such as Au, Ag or Cu partially surrounds the magnetic write pole. The heat sink structure can be formed to contact first and second sides of the magnetic write pole, and can be recessed from the media facing surface of the write head. The space between the heat sink structure and the media facing surface can be filled with a physically hard, non-corrosive metal.

Heat assisted magnetic data recording head with heat sink

A method for manufacturing a magnetic write head having a heat sink structure, wherein the magnetic write head is free of voids at the media facing surface. After forming the write pole, a chemical mechanical polishing process is performed prior to defining the heat sink structure. Planarizing the write pole structure by chemical mechanical polishing prior to forming the heat sink structure advantageously reduces the topography over which the heat sink structure. This mitigates shadowing effects from the write pole structure and prevents the formation of voids at the media facing surface.

In one embodiment, an apparatus includes a main pole, at least one side shield positioned on sides of the main pole, and a trailing shield having a multi-bump structure positioned near a trailing side of the main pole, wherein the multi-bump structure has six junctures along the trailing shield facing the main pole, a first juncture positioned at a media-facing surface, a sixth juncture positioned away from the media-facing surface, and second, third, fourth, and fifth junctures positioned along the side of the trailing shield facing the main pole between the first and sixth juncture, wherein an element height of a first face of the trailing shield positioned between the fourth and fifth juncture is less than an element height of a second face of the trailing shield positioned at an end of the trailing shield positioned opposite the media-facing surface of the trailing shield.

Magnetic head having a double bump wrap around shield

In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated by a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.

Stitched pole having a tapered tip

Approaches for a magnetic write head having an adjacent coil architecture, wherein a coil turn is fabricated immediately adjacent to the writer main pole. The adjacent coil portion essentially lies on the main pole, except for a very thin layer of insulation atomically layered in between. The adjacent coil portion is also substantially closer to the wrap-around shield in comparison with conventional coil configurations. Further, the other upper coil portions may be fabricated to essentially lie on the stitch pole, again except for a very thin atomic layer deposited layer of insulation layered between. This adjacent coil configuration provides a writer coil configuration that concentrates the coil structure significantly closer to the main pole surface, as well as concentrates more of the coil structure closer to the main pole tip, providing for a more efficient and faster write head.

Magnetic write head having a coil adjacent to the main pole

A magnetic write head having a stitched magnetic pole (also referred to as a shaping layer) for conducting magnetic flux to the pole tip portion of a magnetic write pole. The stitched magnetic pole has a shape so as to be thicker in a central region that is aligned with the pole tip of the write pole and is thinner a its outer sides. This shape helps to channel magnetic flux to the pole tip portion of the write pole while maintaining sufficient pole surface area for high data rate recording.

Perpendicular magnetic write head having a hull shaped stitched pole

The present invention generally relates to a magnetic sensor in a read head having a hard or soft bias layer that is uniform in thickness within the sensor stack. The method of making such sensor is also disclosed. The free layer stripe height is first defined, followed by defining the track width, and lastly the pinned layer stripe height is defined. The pinned layer and the hard or soft bias layer are defined in the same process step. This approach eliminates a partial hard or soft bias layer and reduces potential instability issues.

Shape enhanced pin read head magnetic transducer with stripe height defined first and method of making same

Write heads may be formed by reactive ion etching (RIE) a dielectric mask and then reactive ion etching a polymeric underlayer. The first RIE affects the second RIE. The first portion of the first RIE process is performed with a ratio of CFto CHFbetween about 1.3 to 2, a gas flow ratio of CFto He between 2.2 and about 3, and a ratio of RF source power to RF bias power between about 10 and about 16. The second portion of the first RIE process is performed with a ratio of CFto CHFbetween about 0.3 to 0.8, a gas flow ratio of CFto He between about 1.2 and about 1.8, and a ratio of RF source power to RF bias between about 22 to 28. With the above parameters, the dielectric mask can be formed with minimized damage on the underlayer.

Method for defect reduction in magnetic write head fabrication

A method for manufacturing a magnetic sensor that allows the sensor to be constructed with a very narrow track width and with smooth, well defined side walls. A tri-layer mask structure is deposited over a series of sensor layers. The tri-layer mask structure includes an under-layer, a Si containing hard mask deposited over the under-layer and a photoresist layer deposited over the Si containing hard mask. The photoresist layer is photolithographically patterned to define a photoresist mask. A first reactive ion etching is performed to transfer the image of the photoresist mask onto the Si containing hard mask. The first reactive ion etching is performed in a chemistry that includes CF, CHF, O, and He. A second reactive ion etching is then performed in an oxygen chemistry to transfer the image of the Si containing hard mask onto the under-layer, and an ion milling is performed to define the sensor.

Method for manufacturing a magnetoresistive sensor

A magnetic write head having a write pole and a trailing, wrap-around magnetic shield formed over the write pole and separated from the write pole by a non-magnetic trailing gap layer and non-magnetic side gap layers. The write head includes a remnant magnetic seed layer, that while being used to facilitate electroplating of the magnetic shield, is left intentionally extending beyond the back edge of the magnetic shield. This extended portion of the magnetic seed layer acts as a shunt for magnetic flux and prevents data erasure due to over-writing.

Magnetic write head having a residual shield seed layer for reducing overwriting

A method according to one embodiment includes etching an underlayer positioned under a main pole for reducing a thickness thereof and creating an undercut under the main pole; adding a gap material along sides of the main pole and in the undercut; and forming a shield along at least a portion of the gap material. A magnetic head according to one embodiment includes a main pole; an underlayer positioned under the main pole and spaced therefrom, thereby defining an undercut therebetween; a first layer of gap material extending along sides of the main pole and in the undercut; a second layer of gap material extending continuously along the underlayer under the main pole; and a shield encircling the main pole, wherein the shield extends between the first and second layers of gap material in the undercut. Additional systems and methods are also presented.

Systems having writer with deeper wrap around shield and methods for making the same

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San Jose, CA, United States of America

Aron Pentek