Joseph M Sexton

US Patent:

6628598, Sep 30, 2003

Filed:

Dec 5, 2000

Appl. No.:

09/730242

Inventors:

Jathan D. Edwards - Afton MN
Garry R. Lundstrom - Forest Lake MN
Paul R. Iverson - St. Croix Falls WI
Joseph H. Sexton - Oakdale MN

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G11B 700

US Classification:

369 99, 369124, 369 14, 360 59, 360 7703

Abstract:

A system for reading data from recording media having topographical features readable with a slider-mounted non-magnetic transducer sensitive primarily to changes in local aerodynamic boundary conditions.

US Patent:

6911256, Jun 28, 2005

Filed:

Jun 30, 2003

Appl. No.:

10/609863

Inventors:

Joseph H. Sexton - Oakdale MN, US

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G11B005/66
G11B005/70

US Classification:

428336, 428694 TS, 428694 SL

Abstract:

The invention is directed to magnetic media that make use of plastic substrates. Various buffer layer compositions are described, which can be formed over the plastic substrate. One or more ferromagnetic recording layers are then formed over the buffer layers. The described buffer layers can function as encapsulating layers in order to encapsulate the plastic substrate and provide a barrier between subsequently deposited magnetic layers and the gases within the substrate. Also, the buffer layers can reduce stress in the media either by functioning as a stress reduction layer that promotes growth of the magnetic recording layer in low stress orientations, or by functioning as a stress compensation layer that balances the stress of the subsequently deposited magnetic layers.

US Patent:

6921585, Jul 26, 2005

Filed:

May 15, 2002

Appl. No.:

10/146269

Inventors:

Joseph H. Sexton - Oakdale MN, US

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G11B005/673

US Classification:

428669, 428678, 428216, 428694 TS, 428694 TM

Abstract:

Perpendicular magnetic media are described for use in magnetic recording and data storage. For example, a magnetic medium may include a substrate, an amorphous underlayer formed over the substrate, a seed layer formed over the amorphous underlayer, and a multi-layered magnetic stack formed over the seed layer. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities can be increased.

US Patent:

6953629, Oct 11, 2005

Filed:

Jun 30, 2003

Appl. No.:

10/609990

Inventors:

Michael B. Hintz - Mahtomedi MN, US
Joseph H. Sexton - Oakdale MN, US

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G11B005/66
G11B005/70

US Classification:

428694TS, 427131

Abstract:

Perpendicular magnetic media are described for use in magnetic recording and data storage. Seed layer compositions are described which can facilitate perpendicular magnetic anisotropy in subsequently deposited magnetic layers. In particular, nickel-iron-chromium (NiFeCr) alloys or nickle-chromium (NiCr) alloys can be used as seed layers which cause a subsequently multi-layered magnetic stack to assume perpendicular magnetic anisotropy. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities of media may be increased.

US Patent:

6986954, Jan 17, 2006

Filed:

Apr 17, 2002

Appl. No.:

10/123957

Inventors:

Joseph H. Sexton - Oakdale MN, US

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G11B 5/673

US Classification:

428694TS, 428694 TM

Abstract:

Perpendicular magnetic media are described for use in magnetic recording and data storage. For example, a magnetic medium may include a substrate, a layer of titanium formed over the substrate, a layer of platinum formed over the layer of titanium, and a multi-layered magnetic stack formed over the layer of platinum. The layer of titanium provides a seed layer to improve the crystal texture of the layer of platinum. The layer of platinum, in turn, provides a seed layer to improve the crystal texture of the multi-layered magnetic stack. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities can be increased.

US Patent:

8092888, Jan 10, 2012

Filed:

Mar 25, 2008

Appl. No.:

12/079120

Inventors:

Joseph H. Sexton - Oakdale MN, US
Richard F. Willson - Hudson WI, US

Assignee:

Imation Corp. - Oakdale MN

International Classification:

B32B 3/02

US Classification:

428 641, 428 644, 43027012

Abstract:

An optical data storage disk including a substrate, a nanocrystalline noise reduction layer formed over the substrate, a reflector formed directly on the noise reduction layer and a cover layer formed over the reflector layer. An optical source detects data from the disk through the cover layer. In some embodiments, the reflector layer forms part of a multilayer recording stack and the cover layer is formed over the multilayer recording stack. In some embodiments, the noise reduction layer includes one or more components selected from the group consisting of Ti, Ti alloys, Ti oxides, Cr, Cr alloys and Cr oxides. Additionally, a method of forming an optical data storage disk that includes a nanocrystalline noise reduction layer.

US Patent:

20020067683, Jun 6, 2002

Filed:

Dec 5, 2000

Appl. No.:

09/730103

Inventors:

Paul Iverson - St. Croix Falls WI, US
Michael Hintz - Mahtomedi MN, US
Joseph Sexton - Oakdale MN, US

Assignee:

Imation Corp.

International Classification:

G11B009/00

US Classification:

369/126000

Abstract:

Playback transducers for patterned media systems comprise temperature sensitive resistors, including thermistors and resistance temperature detectors. The transducers are typically thin film depositions mounted on a slider for flying head application. Possible configurations are generally V-shaped, may involve parallel or perpendicular recording geometry, and are conceptually similar to (but simpler in construction than) magnetoresistive or giantmagnetoresistive thin film transducers. The transducers may incorporate supplementary heating elements and/or coatings to optimize performance.

US Patent:

54608538, Oct 24, 1995

Filed:

May 24, 1994

Appl. No.:

8/248579

Inventors:

Michael B. Hintz - Mahtomedi MN
Joseph H. Sexton - Oakdale MN
William C. Mitchell - Arden Hills MN
John W. Ulseth - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C23C 1600

US Classification:

4272555

Abstract:

A method of sequential deposition of source materials onto a web substrate. A substrate transfer mechanism imparts continuous movement of a substrate past a plurality of deposition sources during vapor deposition of deposition source materials. Every portion of the substrate is exposed to deposition fluxes from the deposition sources in an alternating periodic manner. The number of source exposures is greater than the number of sources.