Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

International Business Machines Corporation

Hitachi Global Storage Technologies B.v.

Hitachi Global Storage Technologies

Wen-Chien David Hsiao

Vladimir Nikitin

Aron Pentek

Yi Zheng

Yimin Hsu

Edward Hin Pong Lee

Hardayal Singh Gill

Quan-chiu Harry Lam

Sue Siyang Zhang

Yansheng Luo

Ming Jiang

Yinshi Liu

Katalin Pentek

Amanda Baer

Donald Giles Allen

Changqing Shi

Hung-Chin Guthrie

Jih-Shiuan Luo

Samuel Weisan Yuan

Jyh-Shuey Jerry Lo

Savas Gider

Xiaodong Che

Xiaoyu Sui

Liubo Hong

Wipul Jayasekara

Ning Shi

Honglin Zhu

Andrew Chiu

Trevor W Olson

Samuel Wei-san Yuan

Kyusik Shin

Michael Ming Hsiang Yang

Yuan Yao

Edward H P Lee

Terence T L Lam

Stefan Maat

Yingjian Chen

Alexander Michael Zeltser

Douglas Johnson Werner

Terence T Lam

Michael R Feldbaum

Venkatesh Chembrolu

Fenglin Liu

Yiping Hsiao

Terence Tin-Lok Lam

Xinjiang Shen

John I Kim

Hieu Lam

Yuming Zhou

Eric Wayne Flint

Qiping Zhong

Michael Yang

Jennifer Leung

Prabodh Ratnaparkhi

Werner J Douglas

David John Seagle

Kuok San Ho

Kim Yang Lee

Na Young Kim

Jing Zhang

Hugo Alberto Emilio Santini

Howard Gordon Zolla

Glen A Garfunkel

Yong Shen

Bernd Lamberts

Patrick Rush Webb

Edward Hinpong Lee

Tsung Yuan Chen

Joseph John Fatula, Jr

Marie-Claire Cyrille

Guomin Mao

Daniel Wayne Bedell

Wen-yaung Lee

Christian Rene Bonhote

Supradeep Narayana

Hicham Moulay Sougrati

Shiwen Huang

Peter Beverley Powell Phipps

Malika Dothresa Carter

Gautam Khera

John W Lam

Jennifer Ai-Ming Leung

Yongho Ju

Tom King Harris, Iii

Thomas J A Roucoux

Aaron Neuhaus

Wipul Pemsiri Jayaekara

Venkata R K Gorantla

Jennifer Ai-Ming Loo

Bin V Cao

David Kaimon Lee

David A Dudek

Terry Olson

Yangsheng Luo

Hin P E Lee

John Jaekoyun Yang

Junsheng Yang

David M Arken

Valeri Synogatch

Robert William Hitzfield

The embodiments of the present invention generally relate to a method for forming a trench in which a write pole is deposited therein. The trench is formed with a single mask and multiple reactive ion etching (RIE) processes and has substantially straight side walls and a consistent bevel angle along the length of the write pole. The consistent bevel angle along the length of the write pole allows the bevel angle at the ABS to be consistent regardless of where the cut is when defining the ABS.

Method for forming a magnetic head for perpendicular magnetic recording

Depositing a seed layer for a high-moment shield onto a write pole may have a deleterious effect on the magnetic response of the write pole. Instead, an amorphous separation layer may be deposited between the write pole and the seed layer. In one embodiment, the seed layer is formed directly on the amorphous layer. In addition to separating the seed layer from the write pole, the amorphous separation layer permits the seed layer to dictate the crystallographic orientation of the shield which is subsequently deposited on the magnetic head. That is, the amorphous layer provides a substrate that allows the seed layer to have a crystalline structure independent of the layers that were deposited previously. The amorphous separation layer may comprise an amorphous metal&#x2014;e.g., NiNb or NiTa&#x2014;or an insulative material&#x2014;e.g., alumina or silicon dioxide.

Shield with uniform magnetic properties for a perpendicular magnetic recording head

Approaches for a magnetic write head having a stacked coil architecture. Embodiments utilize the better process control capability available with thin films' thicknesses, compared to the control capability of vertical gap-filling processes, which provides for better scalability to shorter yoke length magnetic write heads, which are faster at writing data bits than are magnetic write heads having a longer yoke length.

Magnetic write head having a stacked coil architecture for high data rate performance

The embodiments of the present invention relate to a magnetic write head and a method for forming the magnetic write head. The magnetic write head includes a partially laminated main pole that has a magnetic layer that is recessed from a media facing surface, a nonmagnetic spacer layer disposed on and adjacent to the magnetic layer and a laminated stack disposed on at least a portion of the nonmagnetic layer. The nonmagnetic spacer layer has a first end at the media facing surface and a second end at a distance from the media facing surface and the laminated stack has a first end at the media facing surface and as second end at a distance from the media facing surface.

Partial main pole lamination for pole erasure improvement

Embodiments disclosed herein generally relate to a magnetic write head. The magnetic write head includes a write pole, a shield and a first coil disposed around the write pole. The magnetic write head further includes a magnetic circuit and the magnetic circuit includes a loop of magnetic material and a second coil disposed around the loop of magnetic material. The magnetic circuit magnetically resets the shield to improve far track interference.

Real time writer shields magnetization optimization for FTI improvement

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

A perpendicular magnetic write head having a laminated trailing return pole structure that reduces magnetic eddy currents in the return pole for improved write head efficiency. The trailing magnetic return pole includes multiple magnetic layers. Each magnetic layer is separated from an adjacent magnetic layer of the return pole by a non-magnetic layer. The non-magnetic layer terminates at a region that is removed from the air bearing surface in order to allow contact between the magnetic layers at the ABS, thereby preventing stray magnetic fields from emitting from the magnetic layers of the write pole.

Perpendicular magnetic write head having a laminated trailing return 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

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

In one embodiment, a magnetic head includes a main pole having a trapezoidal cross-section at a media-facing surface thereof and a flared shape with a greater width in a cross-track direction at positions away from the media-facing surface, a leading shield positioned near a leading side of the main pole, wherein a leading gap is provided between the main pole and the leading shield, side shields positioned on both sides of the main pole in the cross-track direction adjacent the media-facing surface of the main pole, with side gaps provided between the main pole and both of the side shields, and a trailing gap provided on a trailing side of the main pole at the media-facing surface thereof, with a throat height of the side shields being less than the throat height of the side shields at a position closer to the trailing gap than the leading gap.

Tapered leading and side shields for use in a perpendicular magnetic recording head

A magnetic head for data recording having a pair of heating elements that self regulate in response to temperature to distribute heat for thermal actuation. The head includes a first heating element located adjacent to the read sensor and away from the writer, and a second heating element located adjacent to the writer. The first and second heating elements have different coefficients of thermal resistance that cause the heating of the second heating element to increase relative to that of the first heating element when the overall temperature increases or when power provided by a power source increases. There, thereby prevents the read sensor from extending too much and possibly contacting the disk.

Magnetic head with self compensating dual thermal fly height control

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

A method in one embodiment includes forming a layer of a nonmagnetic material above an upper surface of a substrate; forming a resist structure above the layer of nonmagnetic material, wherein the resist structure has an undercut; removing a portion of the layer of nonmagnetic material not covered by the resist structure; depositing a layer of magnetic material above the substrate adjacent a remaining portion of the layer of nonmagnetic material such that at least portions of the layer of magnetic material and the remaining portion of the layer of nonmagnetic material lie in a common plane; removing the resist structure; and forming a write pole above the layer of magnetic material and the remaining portion of the layer of nonmagnetic material. Additional methods are also presented.

Methods for creating a stepped perpendicular magnetic pole via milling and/or metal liftoff

A magnetic write head having a trailing shield configured to optimize both write field strength and field gradient. The write head includes a write pole, a trailing gap layer formed over the trailing edge of the write pole and a trailing magnetic shield formed over the non-magnetic write gap layer such that the non-magnetic write gap layer is sandwiched between the trailing magnetic shield and the write pole. The trailing magnetic shield has a first surface disposed at the air bearing surface and second surface disposed away from the air bearing surface that is tapered at an angle of 20 to 75 degrees relative to the trailing edge of the write pole.

Perpendicular write head having a trailing shield with a short gap, short throat and high apex angle for improved linear density recording

Growing community of inventors

San Jose, CA, United States of America

Wen-Chien David Hsiao