Seagate Technology Incorporated

Intel Corporation

Connie C Liu

Linda Lijun Zhong

Jeff Duane St John

Kueir-Weei Chour

Qixu David Chen

Mariana Rodica Munteanu

Chung Yuang Shih

Joseph Leigh

Miaogen Lu

Jeffery Lee Petrehn

Thomas P Nolan

Achintya K Bhowmik

Erol Girt

Li-Ping Wang

Nagesh K Vodrahalli

Jean Ling Lee

Ian J Beresford

Biswajit Sur

Shanghsien Alex Rou

Li Tang

Lin Huang

Edward T Yen

Mason Lu

Steve Hwang

Kueir Weei Chour

Takaharu Fujiyama

Shawn A Mawla

David E Brown

Michael Zyee-Shan Wu

Lynn Li

Kenji Takahashi

David S Kuo

Jianhua Xue

Samuel Dacke Harkness, Iv

Xiaoding Ma

Youfeng Zheng

Zhong Stella Wu

Li-Lien Lee

Tao Zhang

Weilu Hang Xu

Samuel Dacke Harkness

Zhaohui Fan

Bogdan Florin Valcu

Kai-Chieh Chang

Xinwei Li

Yuanda Randy Cheng

Wen Jiang

Shanghsien S Rou

Bo Bian

Antonio Javier Zambano

Jerry Kueirweei Chour

Pengcheng Li

Chun Wang

Alexander Hazanov

Weikang Shen

Jeffrey Lee Petrehn

Roger Rostron Wills

Jeff A Railton

Apparatus for recording data and method for making the same. In accordance with some embodiments, a magnetic layer is supported by a substrate and comprises a magnetic magnetic material, a non-magnetic material, and an energy assisted segregation material. The segregation material enhances segregation of the non-magnetic material into grain boundaries within the layer at an elevated, moderate energy level.

Perpendicular recording media with enhanced anisotropy through energy assisted segregation

A perpendicular recording medium with enhanced magnetic stability. In accordance with some embodiments, a multi-layer recording structure is formed on a base substrate and adapted to magnetically store a magnetic bit sequence in domains substantially perpendicular to said layers. A thin magnetic stabilization layer is formed on the multi-layer recording substrate to magnetically stabilize an upper portion of the recording structure.

Recording medium with thin stabilization layer having high magnetic saturation and anisotropic field characteristics

An apparatus is disclosed. The apparatus includes a storage layer, a first write layer, and a second write layer. The first write layer is disposed over the storage layer. The second write layer is disposed over the first write layer. The anisotropy field and magnetization associated with the second write layer at writing temperature is greater than anisotropy field and magnetization associated with the first write layer at the writing temperature.

Heat assisted magnetic recording media with enhanced tuning exchange coupling

A corrosion-resistant granular magnetic recording medium with improved recording performance comprises a non-magnetic substrate having a surface; and a layer stack on the substrate surface, including, in order from the surface: a granular magnetic recording layer; an intermediate magnetic de-coupling layer; and a corrosion preventing magnetic cap layer. The intermediate magnetic de-coupling layer has an optimal thickness and/or composition for: (1) promoting magnetic exchange de-coupling between the granular magnetic recording layer and the magnetic cap layer; and (2) reducing the dynamic closure field (H) for determining writeability and eraseability of the medium. Grain boundaries of the magnetic cap layer are substantially oxide-free, and have a greater density and lower average porosity and surface roughness than those of the granular magnetic recording layer.

Corrosion resistant granular magnetic stack

A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.

Method and manufacture process for exchange decoupled first magnetic layer

A perpendicular magnetic recording medium comprises a non-magnetic substrate having a surface; and a plurality of overlying thin film layers forming a layer stack on the substrate surface, the layer stack including a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), the SUL having a thickness of up to about 100 &#x212b;. Also disclosed is a data/information recording, storage, and retrieval system comprising the perpendicular magnetic recording medium and a single-pole magnetic transducer head including main and auxiliary poles positioned in spaced adjacency to an upper surface of the layer stack, the single-pole transducer head comprising a front shield adjacent the main pole.

Perpendicular magnetic recording media with thin soft magnetic underlayers and recording systems comprising same

An apparatus may include a composite soft underlayer and a perpendicular magnetic recording layer overlying the composite soft underlayer. The composite soft underlayer may include a growth template layer, a negative magnetic anisotropy layer overlying the growth template layer, and a magnetically soft layer overlying the negative magnetic anisotropy layer. In some embodiments, the negative magnetic anisotropy layer includes a plurality of grains, and substantially all the grains have negative magnetic anisotropy along an axis substantially perpendicular to a major plane of the composite soft underlayer. In some embodiments, the negative magnetic anisotropy layer includes a thickness of less than or equal to about 3 nm.

Composite soft underlayer including negative anisotropy material

A magnetic recording medium having a Au, Ag-containing magnetic layer having Co, Cr, Ag and Au; the magnetic recording layer having Co-containing magnetic grains surrounded by substantially nonmagnetic Cr-containing grain boundaries; wherein said Ag and said Au are substantially immiscible in the Co-containing magnetic grains is disclosed.

Magnetic storage media with Ag, Au-containing magnetic layers

The invention relates to a perpendicular magnetic recording medium having a substrate and a seed layer comprising a Ni alloy.

Nickel based alloy layer for perpendicular recording media

Corrosion-resistant granular magnetic media with improved recording performance and methods of manufacturing same

Ultra smooth as-deposited composite nickel coatings for use in an information storage system are provided. The composite nickel coatings include an electrolessly deposited nickel layer formed on a sputter deposited nickel layer. The composite nickel coatings have an as-deposited surface roughness of less than about 10 &#x212b;. Embodiments include formation of the composite nickel coating on a disk, followed by deposition of an underlayer and magnetic layer thereon to form a magnetic recording medium.

Using plated surface for recording media without polishing

A method and apparatus that includes a first waveguide segment that differentially changes the amplitude of the light relative to a first polarization orientation, a thickness of oriented liquid crystal or other birefringent material sufficient to delay one polarization component one-half wavelength relative to another, and a second waveguide segment that also differentially changes the amplitude of the light based on the polarization orientation. Also, an apparatus that includes a thin polarization converter that includes a thin first substrate that is substantially transparent to a wavelength of light, and a birefringent material deposited on one or more surfaces of the first substrate and oriented such that the polarization converter forms a half-wavelength birefringent plate for the light. Also, an apparatus having a first substrate surface, a second substrate surface, and a liquid crystal material between the first and second substrate surfaces to form a polarization converter.

Ultra-thin polarization mode converters based on liquid crystal materials

Beginning with a smooth ground aluminum blank with a relatively thin layer of leveled Ni&#x2014;P, circumferential electropolishing/texturing is carried out to achieve a smooth oriented surface. A conductive slurry is provided between the disc and a porous texturing tape which is in contact with a conducting plate or equivalent conductor. The disc serves as the anode, and the conducting plate as the cathode, while the slurry, being conductive, functions as an electrolyte. In the presence of current, a reverse electroplating occurs so that the Ni&#x2014;P dissolves to form Ni, or nickel ions which are carried away by the conductive slurry. The conductive slurry further supports or carries therein abrasive material so that by moving the porous texturing tape past the disc surface, the texturing tape picks up the abrasive material in the slurry and simultaneously with the reverse electroplating, provides the desired mechanical abrasion to achieve texturing of the disc surface. The abrasive material comprises diamond particles. The circumferential electropolishing/texturing polish is achieved by spinning the disc while applying the mechanical-chemical action through the slurry system to the disc surface with electric current passing through the electrically conducting interface during processing.

Single-step electromechanical mechanical polishing on Ni-P plated discs

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San Jose, CA, United States of America

Connie C Liu