Thomas Bengt Nolan

US Patent:

7211340, May 1, 2007

Filed:

Jan 28, 2004

Appl. No.:

10/765208

Inventors:

Thomas Patrick Nolan - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/66

US Classification:

4288312, 428669, 428671, 428672, 428673, 428674, 428675

Abstract:

A multiple layer structure comprising a pair of spaced-apart crystalline layers of different materials with an intermediate crystalline layer between and in contact with each of the pair of crystalline layers, the intermediate crystalline layer providing one of the crystalline layers of the pair with a stronger out-of-plane preferred growth orientation than if each of the pair of crystalline layers are in overlying contact. Disclosed and preferred embodiments include perpendicular magnetic recording media comprising the multiple layer structure as an intermediate layer structure beneath a perpendicular magnetic recording layer for strengthening a preferred out-of-plane growth orientation of the latter.

US Patent:

7247396, Jul 24, 2007

Filed:

Jan 27, 2004

Appl. No.:

10/764602

Inventors:

Thomas Patrick Nolan - Fremont CA, US
Erol Girt - Berkeley CA, US
Chunghee Chang - Fremont CA, US
Qixu Chen - Milpitas CA, US
Li-Lien Lee - San Jose CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/738

US Classification:

4288312, 428831, 428656, 428661, 428664, 428669, 428670, 428671, 428672, 428673, 428674, 428675, 428676, 428212, 428336

Abstract:

A perpendicular magnetic recording medium including an interlayer structure for crystallographically orienting a layer of a hexagonal close-packed (hcp) perpendicular magnetic recording material formed thereon, comprising in overlying sequence from a surface of a magnetically soft underlayer:.

US Patent:

7314675, Jan 1, 2008

Filed:

Jan 30, 2004

Appl. No.:

10/766918

Inventors:

Thomas Patrick Nolan - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/65

US Classification:

4288361

Abstract:

Magnetic recording media having a magnetic layer, wherein the magnetic layer comprises a continuous matrix material and a separate portion that is different from the matrix is disclosed. The matrix comprises a non-ferromagnetic material that is non-ferromagnetic in a bulk state. The separate portion comprises a ferromagnetic material and comprises substantially none of at least one component of the non-ferromagnetic material. One embodiment is a dual magnetic layer recording media including a lower magnetization (Ms), exchange decoupled magnetic bottom layer; and a high Ms, high magnetic anisotropy (Ku), magnetic top layer having exchange decoupled grains. This media enables reduced total magnetic layer thickness and higher signal, while maintaining high Ku and low media noise.

US Patent:

7384699, Jun 10, 2008

Filed:

Aug 2, 2004

Appl. No.:

10/902956

Inventors:

Thomas Patrick Nolan - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/66

US Classification:

428829

Abstract:

A magnetic recording medium with tuned exchange coupling comprises:.

US Patent:

7531248, May 12, 2009

Filed:

Dec 22, 2004

Appl. No.:

11/017657

Inventors:

Thomas Patrick Nolan - Fremont CA, US
Zhong Stella Wu - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/667

US Classification:

428829, 4288362, 4288363, 360131

Abstract:

A perpendicular magnetic recording medium having a substrate, an amorphous soft underlayer of thickness 30 nm or greater, and a granular magnetic recording layer for perpendicular recording is disclosed. The granular magnetic recording layer includes a non-magnetic region between magnetic grains, wherein the non-magnetic region includes metal nitride or metal carbide and provides exchange decoupling between the magnetic grains. The perpendicular recording medium of this invention reduces DC noise and increases media signal-to-noise ratio; it reduces surface roughness, which in turn reduces the head-to-media spacing and the head-to-amorphous soft underlayer spacing.

US Patent:

7780821, Aug 24, 2010

Filed:

Aug 2, 2004

Appl. No.:

10/902960

Inventors:

Thomas Patrick Nolan - Fremont CA, US
Jeffrey Shane Reiter - Palo Alto CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

C23C 14/00
C23C 16/00

US Classification:

20419226, 2041921, 20429823, 20429825, 427127, 427162, 4272555, 118719

Abstract:

A method for treating/processing substrates/workpieces in a multi-chamber treatment/processing apparatus, comprising:.

US Patent:

7851014, Dec 14, 2010

Filed:

Sep 6, 2007

Appl. No.:

11/851190

Inventors:

Thomas Patrick Nolan - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/00
G11B 5/62
G11B 5/708

US Classification:

427128, 427127, 427131, 427132, 428800, 4288421, 4288312

Abstract:

Magnetic recording media having a magnetic layer with an easy magnetization axis lying about 35 out of plane of the magnetic layer is disclosed. This media has a reduced total magnetic layer thickness and higher signal, while improving the media signal-to-noise ratio (SNR).

US Patent:

7998606, Aug 16, 2011

Filed:

Jul 27, 2009

Appl. No.:

12/510114

Inventors:

Raj Nagappan Thangaraj - Fremont CA, US
Mariana Rodica Munteanu - Santa Clara CA, US
Erol Girt - Burnaby, CA
Michael J. Stirniman - Fremont CA, US
Thomas Patrick Nolan - Fremont CA, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 5/66

US Classification:

428832, 427131

Abstract:

A perpendicular magnetic recording medium having a substrate, a Cr-doped Fe-alloy-containing underlayer containing about 8 to 18 at % Cr and a perpendicular recording magnetic layer, and a process for improving corrosion resistance of the recording medium and for manufacturing the recording medium are disclosed.