Steve I Hwang

US Patent:

6641932, Nov 4, 2003

Filed:

Jun 28, 2001

Appl. No.:

09/892626

Inventors:

Weilu Xu - San Jose CA
Yuanda R. Cheng - Singapore, SG
Taesun Ernest Kim - San Jose CA
Chung Shih - Cupertino CA
Liji Huang - San Jose CA
Kueir Weii Chour - San Jose CA
Steve Hwang - San Jose CA
Roger Shih - Cupertino CA

Assignee:

Seagate Technology, LLC - Scotts Valley CA

International Classification:

G11B 566

US Classification:

428666, 428457, 428336, 428667, 428694 TP

Abstract:

A flash chromium capping layer is deposited on a magnetic layer for improved corrosion resistance, reduced poisoning due to the absence of a protective overcoat or presence of discontinuities in a protective overcoat, and for reduced media noise do to inter-granular exchange coupling. Embodiments include depositing a flash chromium layer having a thickness up to about 10 on an upper magnetic layer and depositing an overlying lubricant topcoat. An optional protective overcoat, such as a carbon-containing protective overcoat, can also be deposited on the chromium capping layer. The chromium capping layer forms a protective oxide coating where exposed, as due to the absence of or at discontinuities in the protective overcoat.

US Patent:

D585397, Jan 27, 2009

Filed:

Apr 16, 2008

Appl. No.:

29/306795

Inventors:

Steve Hwang - San Francisco CA, US

Assignee:

OpenPeak Inc. - Boca Raton FL

International Classification:

1403

US Classification:

D14130, D14149

US Patent:

D585398, Jan 27, 2009

Filed:

Apr 16, 2008

Appl. No.:

29/306797

Inventors:

Steve Hwang - San Francisco CA, US

Assignee:

OpenPeak Inc. - Boca Raton FL

International Classification:

1403

US Classification:

D14130

US Patent:

D585399, Jan 27, 2009

Filed:

Apr 16, 2008

Appl. No.:

29/306798

Inventors:

Steve Hwang - San Francisco CA, US

Assignee:

OpenPeak Inc. - Boca Raton FL

International Classification:

1403

US Classification:

D14130

US Patent:

D586326, Feb 10, 2009

Filed:

Mar 31, 2008

Appl. No.:

29/305942

Inventors:

Steve Hwang - San Francisco CA, US

Assignee:

OpenPeak Inc. - Boca Raton FL

International Classification:

1403

US Classification:

D14147, D14138 AA

US Patent:

D587689, Mar 3, 2009

Filed:

Oct 26, 2007

Appl. No.:

29/296764

Inventors:

Steve Hwang - San Francisco CA, US
Paul Krzyzanowski - Flemington NJ, US

Assignee:

OpenPeak Inc. - Boca Raton FL

International Classification:

1403

US Classification:

D14218

US Patent:

7504166, Mar 17, 2009

Filed:

May 27, 2004

Appl. No.:

10/856209

Inventors:

Charles Changqing Chen - Milpitas CA, US
Thanh Thien Ha - San Jose CA, US
Abebe Hailu - San Jose CA, US
Taesun Ernest Kim - San Jose CA, US
Mariana Rodica Munteanu - Santa Clara CA, US
Steve Kuo-Hsing Hwang - San Jose CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/66

US Classification:

428827

Abstract:

CoCrPtB is a conventional material used in some of the layers of a thin film magnetic media structure used for recording data in data storage devices such as hard drives. Typically the CoCrPtB layers used for magnetic media have high Cr and low B in bottom magnetic layers and low Cr and high B in top magnetic layers. In accordance with one embodiment of this invention and to improve media electrical performance, fifth elements, such as Ta, Nb and Hf, etc. were added to the CoCrPtB materials, resulting in CoCrPtB—X, to enhance the grain segregation. The five element CoCrPtB—X layers were deposited using a pulsed direct current sputter technique instead of conventional direct current sputtering techniques. The resulting magnetic media structure having CoCrPtB—X alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.

US Patent:

D592625, May 19, 2009

Filed:

Aug 6, 2008

Appl. No.:

29/322523

Inventors:

Steve Hwang - San Francisco CA, US

Assignee:

OpenPeak Inc. - Boca Raton FL

International Classification:

1403

US Classification:

D14130