Vincent Hung Nguyen

US Patent:

6529673, Mar 4, 2003

Filed:

Jan 31, 2001

Appl. No.:

09/773854

Inventors:

Yongsheng Liu - San Jose CA
Vincent Nguyen - San Jose CA

Assignee:

Avanex Corporation - Fremont CA

International Classification:

G02B 600

US Classification:

385140, 385 16, 385 33

Abstract:

An optical variable attenuator having a reflector in a first position, and a mechanical device for positioning the reflector from the first position to a second position is disclosed. The optical variable mechanical device comprises a first and second guide slots, a moving part, and a screw, where a first guide slot is placed parallel to the second guide slot. The moving part is placed in between and extending in the parallel direction to the first and second guide slots, the screw extending into and away from the moving part. Optionally, a lock pin is used to mount a moving part to avoid injecting any tip and tilt errors. The lock pin is guided by two machined slots on a main body of a variable optical attenuator. Alternatively, two springs loaded balls are positioned in tight contact of the guide slots on the move part, instead of a lock pin.

US Patent:

6961207, Nov 1, 2005

Filed:

May 8, 2002

Appl. No.:

10/142078

Inventors:

Seong Woo Kang - Santa Clara CA, US
Seong Hoon Kim - Cupertino CA, US
Gregory Tran - Santa Clara CA, US
Vincent Nguyen - San Jose CA, US
Scott Tam - San Jose CA, US
Nikollay Ivanov - Campbell CA, US
Joe Bragg - San Jose CA, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon

International Classification:

G11B033/14

US Classification:

360 9702

Abstract:

Aerodynamic forces contribute to disk and actuator vibration leading to track positioning errors in storage devices such as hard disk drives. The invention provides a variety of dampening mechanisms and a method of dampening to alleviate these problems.

US Patent:

7002773, Feb 21, 2006

Filed:

Aug 22, 2002

Appl. No.:

10/226874

Inventors:

Seong Woo Kang - Santa Clara CA, US
Seong Hoon Kim - Cupertino CA, US
Gregory Tran - Santa Clara CA, US
Vincent Nguyen - San Jose CA, US
Scott Tran - San Jose CA, US
Nikollay Ivanov - Campbell CA, US
Joe Bragg - San Jose CA, US

Assignee:

Samsung Electronics Co. Ltd. - Suwon

International Classification:

G11B 33/14

US Classification:

360 9702

Abstract:

Aerodynamic forces contribute to disk and actuator vibration leading to track positioning errors in storage devices such as hard disk drives. The invention provides a variety of dampening mechanisms and a method of dampening to alleviate these problems in single disk storage devices. This includes disk drives of at most 13 millimeters in height.

US Patent:

20120219827, Aug 30, 2012

Filed:

Feb 28, 2011

Appl. No.:

13/037288

Inventors:

Jai-Young Kim - San Ramon CA, US
Thomas P. Nolan - Fremont CA, US
Kyongha Kang - Fremont CA, US
Shoutao Wang - San Jose CA, US
Vincent D. Nguyen - Pleasanton CA, US
Abebe Hailu - San Jose CA, US
Charles C. Chen - Fremont CA, US

Assignee:

SEAGATE TECHNOLOGY LLC - Scotts Valley CA

International Classification:

G11B 5/733
G11B 5/738
G11B 5/66
B05D 5/12

US Classification:

4288281, 427131, 428827, 428828, 428829, 4288312

Abstract:

A stack including a crystallographic orientation interlayer, a magnetic zero layer disposed on the interlayer, and a magnetic recording layer disposed on the magnetic zero layer is disclosed. The magnetic zero layer is non-magnetic or has a saturation magnetic flux density (B) less than about 100 emu/cc. The magnetic zero layer and the magnetic layer include grains surrounded by a non-magnetic segregant. The magnetic zero layer provides a coherent interface between the interlayer and the magnetic layer with a lattice mismatch less than about 4%.

US Patent:

20150332721, Nov 19, 2015

Filed:

Jul 24, 2015

Appl. No.:

14/808063

Inventors:

- Cupertino CA, US
Thomas P. Nolan - Fremont CA, US
Kyongha Kang - Fremont CA, US
Shoutao Wang - Fremont CA, US
Vincent D. Nguyen - Pleasanton CA, US
Abebe Hailu - San Jose CA, US
Charles C. Chen - Fremont CA, US

International Classification:

G11B 5/66
G11B 5/851
G11B 5/73

Abstract:

A stack including a crystallographic orientation interlayer, a magnetic zero layer disposed on the interlayer, and a magnetic recording layer disposed on the magnetic zero layer is disclosed. The magnetic zero layer is non-magnetic or has a saturation magnetic flux density (B) less than about 100 emu/cc. The magnetic zero layer and the magnetic layer include grains surrounded by a non-magnetic segregant. The magnetic zero layer provides a coherent interface between the interlayer and the magnetic layer with a lattice mismatch less than about 4%.