Seagate Technology Incorporated

Charles Frederick Brucker

Qixu David Chen

Paul Stephen McLeod

Chung-hee Chang

Rajiv Yadav Ranjan

Samuel Dacke Harkness, Iv

Jeffrey Shane Reiter

Randall Harry Victora

Edward Charles Gage

Karl Arnold Belser

Jing Gui

Thomas P Nolan

Erol Girt

Neil Deeman

Huan H Tang

Hong Ying Wang

Jean Ling Lee

Terry Wayne McDaniel

Raj Thangaraj

James E Durnin

Gary Clark Rauch

Alexander Yulievich Dobin

Chang Bok Yi

Darrin Dwayne Massey

Tom Nolan

Fernando Anaya Chavez

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

An apparatus and associated method for reorienting the magnetic anisotropy of magnetic recording discs. A pallet that is moveable along a path of travel is also sized to selectively hold either a first magnetic recording disc of a first size or a second magnetic recording disc of a second size different than the first size. A first processing chamber in the path of travel is adapted for forming a soft underlayer (SUL) of magnetic material with non-radially oriented magnetic anisotropy on a substrate corresponding to one of the first and second magnetic recording discs. A second processing chamber in the path of travel downstream of the first processing chamber is adapted for selectively re-orienting the SUL's magnetic anisotropy via a magnetic source emanating a first magnetic field if the substrate corresponds to the first magnetic recording disc and emanating a different second magnetic field if the substrate corresponds to the second magnetic recording disc.

Forming oriented film for magnetic recording material

A method of forming a layer of a magnetic material with radially oriented magnetic anisotropy, comprising sequential steps of providing a circular, annular disk-shaped substrate having an inner diameter and an outer diameter, forming a layer of a magnetic material with non-radially oriented magnetic anisotropy over at least one surface of the substrate, and re-orienting the magnetic anisotropy in a radial direction. Preferably, the re-orientation is performed magnetically and the radially oriented layer serves as a magnetically soft underlayer (SUL) of a magnetic recording medium. Also disclosed is a multi-chamber apparatus for performing the disclosed process.

Method and apparatus for formation of oriented magnetic films for magnetic recording media

A recording medium having a substrate, a first soft magnetic underlayer, a second soft magnetic underlayer and a perpendicular magnetic recording layer without a spacer layer between the first and second soft magnetic underlayers is disclosed.

Perpendicular media with dual soft magnetic layers

An apparatus for reorienting the magnetic anisotropy of the soft underlay of a magnetic recording disc having a diameter less than that of the pallet, which operates by first heating the disc, then using a heat transfer plate to cool the disc in the presence of a magnetic field having a radial direction emanating from the center of the magnetic recording disc.

Apparatus for orienting soft-underlayer deposition

A magnetic recording medium having a first magnetic layer, a spacer layer, and a second magnetic layer, in this order, wherein the spacer layer includes a non-magnetic layer and a thickness of the spacer layer is selected to establish anti-ferromagnetic coupling between the first magnetic layer and the second magnetic layer, and a thickness of both the first and second magnetic layers are less than a critical thickness for formation of stripe domains in the magnetic layers is disclosed.

Anti-ferromagnetically coupled soft underlayer

Carbon or boron is added into the CoCr layers of a multiplayer perpendicular magnetic media structure to reduce media noise. The perpendicular magnetic media structure has sharp interfaces between Co-alloy layers and Pd or Pt layers and significantly reduced exchange coupling. In accordance with one embodiment of the invention, the perpendicular magnetic media structure with carbon or boron additives is 700 &#x212b; FeCoB/20 &#x212b; TaO/700 &#x212b; FeCoB/20 &#x212b; TaO/700 &#x212b; FeCoB/20 &#x212b; TaO/158 &#x212b; FeCoB/17 &#x212b; Ta/49 &#x212b; ITO/33 &#x212b; CoCrRu/2.5 &#x212b; CO/2.5 &#x212b; C/[(CoCr)C/Pd]/50 &#x212b; CHN. [(CoCr)C/Pd]means 19 layers of the bi-layer stack (CoCr)C/Pd. TaOstands for surface-oxidized Ta and COstands for C oxides. ITO stands for Indium Tin Oxide and consists of InOand SnOat 80 and 20 molecular percent respectively. CHN refers to hydrogenated and nitrogenated carbon.

Multilayer perpendicular media with high-boron or high-carbon additives to CoCr films

An apparatus for rapidly establishing at least one preselected gas pressure in a process chamber comprising:

Rapid cycle time gas burster

A method of forming a thin film on a substrate/workpiece by sputtering, comprising steps of:

Gas injection for uniform composition reactively sputter-deposited thin films

A method of manufacturing a magnetic recording medium comprises sequential steps of:

In-situ post-deposition oxidation treatment for improved magnetic recording media

Embodiments of a data storage system having thermally activated readout are provided, in one embodiment, a data storage system includes a source of heat, a substrate, a write layer disposed above the substrate, a copy layer disposed above the write layer, a flying head disposed above the layers and carrying the source of heat for heating a selected spot on the copy and write layers, wherein the write layer comprises a ferromagnetic material selected to have an extremely high coercivity at room temperature and a very high write temperature T, and the copy layer comprises a ferromagnetic material selected to have a coercivity always less than coercivity of the write layer at the same temperature and a copy temperature Tsubstantially less than the write temperature of the write layer.

Data storage system having thermally activated readout

A high-saturation magnetization composite soft magnetic film can be deposited by magnetron co-sputtering of two or more kinds of materials using targets which have a lower saturation magnetization than that of a single target, which otherwise will be used to produce the resulting composite soft magnetic film. The composite film has a substantially uniform composition and thickness.

Sputtering target and method for making composite soft magnetic films

Corrosion protection of magnetic recording media is achieved by providing a thin protective barrier layer comprising ruthenium on the magnetic layer. Embodiments include forming a corrosion barrier layer less than 10 &angst; of elemental ruthenium, a ruthenium oxide, a ruthenium alloy, a layer comprising mixed oxides of ruthenium and an alloying element, a composite of a ruthenium layer and a layer of ruthenium oxide or a composite of a ruthenium alloy layer and a layer of mixed oxides of ruthenium and an alloying element. A carbon containing an overcoat is then formed, as at a thickness of about 10 &angst; to 50 &angst;, on the corrosion protective layer.

Magnetic recording media with Ru corrosion barrier layer

The present invention relates to compensated crystalline superlattice ferrimagnets. The ferrimagnets include multiple ferromagnetic layers having different magnetic disordering temperatures in combination with antiferromagnetically coupled layers. The crystalline ferromagnetic layers may include metals or alloys such as Ni, Co and Fe. The crystalline antiferromagnetically coupled layers may include metals or alloys such as Rh, Ir, Cr, Ru, Os, W and Mn. The superlattice ferrimagnets may be used in such applications as data storage or memory layers in thermally assisted magnetic recording media.

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Pleasanton, CA, United States of America

Charles Frederick Brucker