Seagate Technology Incorporated

Hong Ying Wang

Neil Deeman

Nobuo Kurataka

David S Kuo

Kim Yang Lee

Christopher Formato

Dieter Klaus Weller

Qing I He

Gennady G Gauzner

Jean Ling Lee

Joseph Leigh

Gary Clark Rauch

Robbee Lee Grimm

Gene Gauzner

Gennady (Gene) Gauzner

Song Sheng Xue

Thomas P Nolan

Huaqing Yin

Venkateswara R Inturi

Erik Jon Hutchinson

Zhaoning Yu

Michael B Hintz

Ibro Tabakovic

Steven Carl Riemer

Yautzong Hsu

Charles Frederick Brucker

David Chris Seets

Steve C Riemer

John A Rice

Kristin Joy Duxstad

Matthew Johnson

Paul A Jallen

Darrin Dwayne Massey

Brian J Daniels

Lyle P Cox

Charles Ericson

Stanley Dale Vierk

John P Spangler

Craig A Ballentine

Provided herein in an apparatus, including a substrate; a functional layer, wherein the functional layer has a composition characteristic of a workpiece of an analytical apparatus; and pre-determined features configured to calibrate the analytical apparatus. Also provided herein is an apparatus, including a functional layer overlying a substrate; and pre-determined features for calibration of an analytical apparatus configured to measure the surface of a workpiece, wherein the functional layer has a composition similar to the workpiece. Also provided herein is a method, including providing a lithographic calibration standard having a functional layer to an analytical apparatus, wherein the functional layer has a composition characteristic of a workpiece of the analytical apparatus; providing calibration standard specifications to a computer interfaced with the analytical apparatus; and calibrating the analytical apparatus in accordance with calibration standard readings and the calibration standard specifications.

Calibration standard with pre-determined features

A method of adhering a magnetic layer to a plastic substrate of a magnetic recording medium, the method including depositing a SiN-containing layer on the plastic substrate and depositing a magnetic layer on the SiN-containing layer is disclosed. Also disclosed is a disc for a rotating recording system including a plastic substrate, a bilayer including a SiN-containing layer and a metal-containing layer on the plastic substrate, and magnetic media on the bilayer.

Magnetic media on a plastic substrate

A method of fabricating a patterned magnetic recording medium, comprises steps of: (a) providing a layer stack including an uppermost non-magnetic interlayer; (b) forming a resist layer on the interlayer; (c) forming a first pattern comprising a first group of recesses extending through the resist layer and exposing a first group of spaced apart surface portions of the interlayer; (d) filling the first group of recesses with a layer of a hard mask material; (e) selectively removing the resist layer to form a second pattern comprising a second group of recesses extending through the hard mask layer and exposing a second group of spaced apart surface portions of the interlayer; and (f) filling the second group of recesses with a layer of a magnetically hard material forming a magnetic recording layer.

Process for fabricating patterned magnetic recording device

A method of manufacturing a stamper/imprinter for patterning a recording medium via thermally assisted nano-imprint lithography, comprising steps of: selecting a recording medium for patterning, comprising a substrate with a first coefficient of thermal expasnsion (CTE); providing a first stamper/imprinter comprising a topographically patterned surface having a correspondence to a selected pattern to be formed in a surface of the medium; providing a sheet of a material having a second CTE matching the first CTE; molding a layer of a polymeric material surrounding the sheet of material and having a surface in conformal contact with the topographically patterned surface of the first stamper/imprinter; and separating the layer of polymeric material from the patterned surface of the first stamper/imprinter to form a second stamper/imprinter comprising a topographically patterned stamping/imprinting surface having a correspondence to the selected pattern.

Thermal compensated stampers/imprinters

Process for fabricating patterned magnetic recording media

A method of forming a reader of a magnetic head includes multiple processing steps. First, a sensor is formed having an air bearing surface. Next, a hard mask is formed on the sensor extending a distance from the air bearing surface substantially equal to the desired stripe height of the sensor. Finally, a portion of the sensor not covered by the hard mask is removed.

Hard mask method of forming a reader of a magnetic head

The present invention relates to methods for forming textured surfaces in a polymeric surfaces. Moreover, the present invention relates to methods for forming textured surfaces in a polymeric surfaces and faithfully replicating the textured surfaces in the surfaces of sol-gel films on the surfaces of very hard materials, e.g., of glass, ceramic, or glass-ceramic substrates.

Method of replicating a textured surface

A method of manufacturing a stamper/imprinter for use in patterning of a recording medium comprises sequential steps of:

Dry passivation process for stamper/imprinter family making for patterned recording media

A method of manufacturing a stamper/imprinter for use in patterning of a recording medium comprising the sequential steps of providing a substrate/workpiece comprising a topographical pattern formed in a portion of a surface of the substrate/workpiece. The pattern defines a periphery. An alignment mark is formed in another portion of the surface of surrounding the periphery. An opaque protective film is formed overlying the entirety of the surface. A peripheral portion of the protective film is removed to expose the alignment mark. Selected portions of the substrate/workpiece are removed while the alignment mark is utilized for accurate alignment during the removal process. Remaining portions of the protective film are removed prior to use.

Method for protecting surface of stamper/imprinter during manufacture thereof

A method of manufacturing a magnetic recording medium comprises steps of providing a non-magnetic substrate for a magnetic recording medium, the substrate including at least one major surface; forming a layer of a sol-gel on the at least one major surface; forming a pattern, e.g., a servo pattern in an exposed surface of the layer of said sol-gel; and converting the layer of sol-gel to a glass or glass-like layer while preserving the pattern in an exposed surface of said glass or glass-like layer. Embodiments of the invention include magnetic media including a patterned glass or glass-like layer formed from a layer of a hydrophilic sol-gel with the pattern embossed therein by means of a stamper having a hydrophilic surface including a negative image of the pattern.

Defect-free patterning of sol-gel-coated substrates for magnetic recording media

A method of manufacturing a perpendicular magnetic recording medium, comprises steps of: (a) providing a substrate of an amorphous thermoplastic polymer material having softening and glass transition temperatures as low as about 95&#xb0; C.; and (b) forming at least one stack of thin film layers atop at least one surface of the substrate, the at least one layer stack including at least one granular magnetic recording layer of perpendicular type, wherein oxides and/or nitrides provide physical de-coupling of adjacent magnetic grains; and wherein each of the thin film layers is formed by depositing at a substrate temperature not greater than about 70&#xb0; C., and the coercivity (H) of the resultant perpendicular magnetic recording medium is at least about 4,000 Oe.

High coercivity perpendicular magnetic recording media on polymer substrates

A method of manufacturing a magnetic recording medium including a servo pattern, comprising steps of:

Servo pattern formation via transfer of sol-gel layer and magnetic media obtained thereby

A method of manufacturing a magnetic recording medium comprises steps of providing a non-magnetic substrate having at least one surface; forming a layer of a sol-gel on the surface, partially drying the sol-gel layer at room temperature to remove a portion of the solvent therein to form a partially dried sol-gel layer of hardness less than that of the substrate; mechanically texturing the surface of the partially dried sol-gel layer; and depositing a layer stack including at least one magnetic layer thereover. Embodiments of the invention include embossing a servo pattern in the as-deposited sol-gel layer prior to partial drying and mechanically texturing, followed by sintering at an elevated temperature to form a substantially fully dried layer having a density and hardness similar to that of glass, and formation of a thin film magnetic media layer stack thereon.

Mechanical texturing of sol-gel&#x2014;coated substrates for magnetic recording media

A magnetic head for use in magnetic data storage systems is provided. The magnetic head includes a substantially non-magnetic writer gap layer and pair of magnetic poles separated by the writer gap layer. A first of the poles includes a first layer formed of a CoNiFe alloy that has a saturation magnetic moment greater than 2.1 Tesla. Methods of fabricating such a head are also disclosed.

Electrodeposited high-magnetic-moment material at writer gap pole

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Fremont, CA, United States of America

Hong Ying Wang