Seagate Technology Incorporated

Seagate Technologies, Inc.

Jing Gui

Michael Joseph Stirniman

Xiaoding Ma

Huan H Tang

Jianwei Liu

Zine-Eddine Boutaghou

Bruno Jean Marchon

Kevin John Grannen

Li-Ping Wang

Mark Anthony Shows

Jeffrey Arthur McCann

Gary Clark Rauch

Bruno Jacques Marchon

David S Kuo

Koichi R Wago

Samuel John Falcone

Raj Thangaraj

Dallas W Meyer

Peter Raymond Segar

Daniel Paul Burbank

Jason Wayne Riddering

Andreas Argyros Polycarpou

David Gerard Wobbe

Xinwei Li

Haun Tang

Paul Stephen McLeod

Lance Eugene Stover

Ramesh Sundaram

Neil Deeman

Joel William Hoehn

Zine Eddine Boutaghou

John L Brand

Scott Edward Ryun

James Morgan Murphy

Jorge Vicente Hanchi

Jean Ling Lee

Mary Cynthia Hipwell

Roger Alan Resh

Jason L Pressesky

James E Angelo

Charles Frederick Brucker

JiPing Yang

Christopher Formato

Wen Hong Liu

Joseph Cheng-Tsu Liu

Dale E Egbert

Kueir-Weei Chour

Samuel Dacke Harkness

Subrahmanyan Nagarajan

Jeffery K Berkowitz

Mukund Channagiri Rao

Joshua Charles Harrison

Jianmin Wang

Roger Ristau

Shashi Bhushan Agarwal

Laura Ann Smoliar

A method and system for cleaning and/or burnishing an article. The article is operated on by a burnishing object having one more cutting edges and one or more heating surfaces. The article rotates relative to the burnishing head and the cutting edges remove asperities from the article. The heating surface can be activated and can optionally protrude from the burnishing head to further reduce roughness of the surface of the article as the article is rotating relative to the head. The cutting edges and heating surfaces can be configured in shape and size (i.e., geometry) to accommodate the article.

Advanced heater-assisted media burnishing head media burnish process

A compound comprising a backbone with a perfluoropolyether chain. The compound also has one or more cyclophosphazene rings attached to or incorporated into the backbone. The compound further includes at least two functional groups attached to the backbone, attached to the one or more cyclophosphazene rings, or a combination thereof.

Low profile lubricant with cyclophosphazene ring attached

A lubricant for improving the durability and reliability of recording media used in hard drives is disclosed. The lubricant comprises a perfluoropolyether main chain with a first end attached to a hexa(trifluoromethylphenoxy)cyclotriphosphazene, a second end attached to a bonding enhancer for enhancing bonding between the lubricant and a carbon-containing layer. The bonding enhancer of the lubricant can contain multiple hydroxyl, amide groups, 2,3-dihydroxy-1-propoxyl, acetamide, methacrylate, methyl methacrylate and glycidyl ether. Some bonding enhancers such as methacrylate, methyl methacrylate or glycidyl ether, can be further activated with ultraviolet light.

Thin film lubricant for advanced tribological performance of storage medium

A data/information storage and retrieval medium comprises:

Stability polymeric lubricants and thin film recording media comprising same

A lubricant for improving the durability and reliability of recording media used in hard drives is disclosed. The lubricant comprises a perfluoropolyether main chain with a first end attached to a hexa(trifluoromethylphenoxy) cyclotriphosphazene, a second end attached to a bonding enhancer for enhancing bonding between the lubricant and a carbon-containing layer. The bonding enhancer of the lubricant can contain multiple hydroxyl, amide groups, 2,3-dihydroxy-1-propoxyl, acetamide, methacrylate, methyl methacrylate and glycidyl ether. Some bonding enhancers such as methacrylate, methyl methacrylate or glycidyl ether, can be further activated with ultraviolet light.

Embodiments relate to lubricants disposed over magnetic storage media, such as rotatable thin film magnetic discs. One embodiment comprises a lubricant compound of a fluoropolyether chain having one or more carbonyl-imide pairs. For example, the carbonyl-imide pair may be located at one end, both ends, and/or in the middle of the fluoropolyether chain.

Lubricant for thin film storage media

A high field contrast magnetic stamper/imprinter for use in patterning of magnetic and magneto-optical (MO) recording media by contact printing, comprises:

High field contrast magnetic stampers/imprinters for contact patterning of magnetic media

Dual-layer carbon-based protective overcoats for recording media by filtered cathodic ARC deposition

An arrangement and method of measuring head-media spacing modulation (HMS_Wq) removes the portion of out-of-plane motion caused by disk modes from the dynamic measurements of hard disk surface topography. Employing time-domain measurement techniques, circumferential surface topographical measurements are made for a hard disk surface. A boundary wavelength is determined, and a first partial HMS_Wq value is determined based upon measurements taken at a first disk rotational speed. A second partial HMS_Wq value is determined based upon measurements taken at a second disk rotational speed. The first and second partial HMS_Wq values are combined to provide a complete and accurate HMS_Wq value, taking advantage of the principle that the disk mode location in the spatial domain topography spectrum converted from the measured time-domain data shifts when the disk rotation speed is changed during the measurement.

Method and arrangement for topographically characterizing a surface of a hard disk with distortion due to disk modes removed

A magnetic recording medium having a lubricant film containing a non-phase separated additive and a lubricant a base layer, wherein the additive is bonded to the base layer, for better and faster mobility of a lubricant to ensure rapid healing of areas of the medium that have been depleted of the lubricant, and a method of manufacturing thereof, is disclosed.

Lubricant film containing additives for advanced tribological performance of magnetic storage medium

A method of simultaneously forming magnetic transition patterns in both side surfaces of a dual-sided magnetic or magneto-optical (MO) recording medium comprises steps of: (a) providing a dual-sided magnetic or MO recording medium having first and second opposing side surfaces; (b) providing a first magnetic stamper/imprinter having a first topographically patterned imprinting surface comprising a plurality of projections and depressions arranged in a first pattern corresponding to a first magnetic transition pattern to be formed in the first side surface; (c) providing a second magnetic stamper/imprinter having a second topographically patterned imprinting surface comprising a plurality of projections and depressions arranged in a second pattern corresponding to a second magnetic transition pattern to be formed in the second side surface, the second magnetic stamper/imprinter being formed from the first magnetic stamper/imprinter in a 'mother'/'son' relationship; (d) contacting the first side surface with the first topographically patterned imprinting surface of the first magnetic stamper/imprinter; (e) contacting the second side surface with the second topographically patterned imprinting surface of the second magnetic stamper/imprinter; and (f) simultaneously forming magnetic transition patterns in both side surfaces of the medium by contact printing.

Method of simultaneously forming magnetic transition patterns of a dual side recording medium

A perfluoropolyether hard disk lubricant having a UV curable functional end group that may be UV cured at a rapid rate with a Xenon excimer lamp. The perfluoropolyether preferably has at least one UV curable functional end group. In one embodiment, the UV curable end group comprises an acrylate.

Reducing UV process time on storage media

Ion beam-deposited, nitrogen-doped C:H films having substantially lower resistivities than undoped ion beam-deposited C:H films and suitable for use as hard, abrasion-resistant overcoat layers for magnetic recording media, such as hard disks, are formed by supplying a mixture of hydrocarbon and nitrogen gases to an ion beam generator. Nitrogen atom content of the films is controlled to within from about 5 to about 25 at. % by appropriate selection of the ratio of hydrocarbon gas flow to nitrogen gas flow. The resultant IBD i-C:HN films exhibit a reduced tendency for charge build-up thereon during hard disk operation by virtue of their lower resistivity vis-&#xe0;-vis conventional a-C:H materials.

Thin-film magnetic recording media with dual intermediate layer structure for increased coercivity

Growing community of inventors

Fremont, CA, United States of America

Jing Gui