Tu H Nguyen

6744597, Jun 1, 2004

Oct 29, 1999

09/430463

Tu Nguyen - San Jose CA
Haeng Soo Lee - Santa Clara CA
Woo-Sung Kim - Santa Clara CA

Samsung Electronics Co., Ltd.

G11B 1732

3602345

An actuator beam that can be incorporated into an actuator arm assembly of a hard disk drive. The actuator beam may include a dynamic absorber that extends from a distal end of the beam. The dynamic absorber may attenuate any resonant displacement in the actuator beam induced by a shock load that is applied to the hard disk drive.

7724479, May 25, 2010

Aug 9, 2006

11/502054

Tu Nguyen - San Jose CA, US
Tho Pham - Milpitas CA, US

Samsung Electronics Co., Ltd. - Suwon, Kyungki-Do

G11B 5/55

3602659, 360 9702, 360 9801

Actuator arm includes an island coupling through a mote to at least two of actuator base, first and second actuator arm bridge. Head stack including at least one actuator arm. Head stack assembly including head stack. Hard disk drive including head stack assembly. Manufacturing methods for actuator arm, head stack, head stack assembly, and hard disk drive, and the products of these processes.

7773339, Aug 10, 2010

Aug 9, 2006

11/502020

Tu Nguyen - San Jose CA, US
Tho Pham - Milpitas CA, US

Samsung Electronics Co., Ltd. - Suwon

G11B 17/02

360 9912, 360 9808

Disk clamp including a disk clamp base and a disk clamp platform. Disk pack including at least one disk coupled between disk clamp and spindle motor. Hard disk drive including disk pack mounted on disk base. Manufacturing methods for disk clamp base, disk clamp platform, disk pack and hard disk drive, and these items as products of their manufacturing processes.

8345387, Jan 1, 2013

Jun 29, 2010

12/826371

Tu Nguyen - San Jose CA, US

Western Digital Technologies, Inc. - Irvine CA

G11B 5/55

3602659, 360 9719

Described herein is a disk drive having an actuator arm constrained layer damper, for reducing, during use, vibration of the actuator arm. The damper can include a first substantially planar portion that is configured to be positioned on and coupled to a top surface of an actuator arm. The damper can also include a second substantially planar portion extending in a plane transverse to the first planar portion and configured to be coupled to at least one of a side surface of the actuator arm or a surface of an adjacent actuator body.

8432641, Apr 30, 2013

Jun 29, 2010

12/825392

Tu Nguyen - San Jose CA, US

Western Digital Technologies, Inc. - Irvine CA

G11B 5/55

3602659, 360 9719

Described herein is a disk drive having a head stack assembly with an actuator arm that is rotatable about an axis of rotation and has a damping layer disposed on the actuator arm. The damping layer has first and second damping portions, which can include an adhesive or viscoelastic layer. The first damping portion has different damping properties than the second damping portion.

20010012175, Aug 9, 2001

Oct 8, 1998

09/168528

KELLY WILLIAMS - BRENTWOOD CA, US
THO PHAM - MILPITAS CA, US
TU NGUYEN - SAN JOSE CA, US

G11B017/02

360/097010

An external bumper that is attached to the housing of a hard disk drive. The disk drive may include a disk that is attached to a spin motor. The spin motor may be mounted to a base plate. An actuator arm assembly may also be mounted to the base plate and coupled to the disk. The disk is enclosed by a cover that is attached to the base plate. Elastomeric bumpers are attached to the corners of the cover and the base plate. The bumpers absorb shock loads that are applied to the hard disk drive. By way of example, if the disk drive is dropped on an external surface the bumpers will make contact with the surface and absorb the impact load applied to the drive.

20060171074, Aug 3, 2006

Sep 21, 2005

11/231531

J. Wagner - San Jose CA, US
Tu Nguyen - San Jose CA, US
Ron Crain - San Jose CA, US
William Witt - Palo Alto CA, US
Greg Lyon - San Jose CA, US

G11B 23/03

360133000

A flexible data storage card and shutter lock is disclosed. The flexible data storage card includes a housing, a media disc, a shutter, and a shutter lock. The housing includes a card top coupled to a base to define an enclosed region, and an access window defined by the base and communicating with the enclosed region. The media disc is rotatably disposed within the enclosed region. The shutter is slidably disposed within the enclosed region and defines a shutter window selectively alignable with the access window. The shutter lock is disposed within the enclosed region and is selectively couplable with the shutter.

59792493, Nov 9, 1999

Jun 9, 1998

9/093936

Ja Choon Koo - Santa Clara CA
Tu Nguyen - San Jose CA
Wilson Long - San Jose CA

Samsung Electronics Co., Ltd. - Suwon

G11B 500

73862541

An actuator resonance tester is provided for testing the resonance of an actuator arm in a hard disk drive device. The tester includes an actuator arm, a pivot, one or more weights, a voice coil, a voice coil motor, an accelerometer, and a processor. The one or more weights are formed on the actuator arm to simulate the mass of at least one read/write head. The base and the test housing are affixed to either end of the pivot to provide it with proper boundary conditions to simulate the boundary conditions of a fully-assembled hard disk drive device. The voice coil and the voice coil motor move the actuator arm rotationally around the pivot. The accelerometer is placed on the actuator arm to measure the horizontal acceleration of the actuator arm. The processor determines the resonance of the actuator arm based on the arm's measured horizontal acceleration. In this way, the resonance of the actuator arm can be tested without the need to construct the entire hard disk drive device.