Wing Chun Shum from 3944 Carracci Ln, San Jose, CA 95135, age 69, Phone: (408)2386138

Us Patents

Interconnect Module For Use In A Suspension Assembly
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US Patent:

7116523, Oct 3, 2006
Filed:

Dec 21, 1998
Appl. No.:

09/219195
Inventors:

Francis Chee-Shuen Lee - San Jose CA, US
Michael Lee McGhee - San Jose CA, US
Salvador Navarro - San Jose CA, US
Eric Christian O'Brien - Fremont CA, US
Wing Chun Shum - San Jose CA, US
Randall George Simmons - San Jose CA, US
Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam
International Classification:

G11B 5/48
US Classification:

3602459
Abstract:

A lead routing module for interconnecting two devices in a suspension assembly. The suspension assembly including at least a suspension, a slider/head assembly, and a lead routing module. The suspension assembly may also include a microactuator. The lead routing module routes electrical signals between at least two devices in the suspension assembly such that the termination leads and/or pads of each device may be conveniently located. The suspension assembly may be used in a disk drive system, or alternatively, in a disk test system used for testing disks.

Method For Reducing Psa Tilt Through Standoff Relocation
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US Patent:

7545605, Jun 9, 2009
Filed:

Jun 15, 2005
Appl. No.:

11/152947
Inventors:

Shinobu Hagiya - Kanagawa-ken, JP
Shigeo Nakamura - Kanagawa-ken, JP
Wing Chun Shum - San Jose CA, US
Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam
International Classification:

G11B 5/60
US Classification:

3602345
Abstract:

A head assembly for a data storage device. The head assembly has a suspension. The head assembly also includes a contact pad coupled to the suspension. The head assembly also includes a slider. The slider is coupled to the suspension at the slider mounting point. The slider mounting point is at least partially bounded by polyimide standoffs. The polyimide standoff closest to the contact pad is positioned to reduce the effect of the solder shrinkage moment.

Integrated-Lead Suspension Vibration-Canceling Member
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US Patent:

7564651, Jul 21, 2009
Filed:

Apr 14, 2005
Appl. No.:

11/106834
Inventors:

Wing Chun Shum - San Jose CA, US
Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam
International Classification:

G11B 5/48
US Classification:

3602445
Abstract:

An apparatus, system, and method are disclosed for compensating for high-gain vibration modes resulting from asymmetrical traces in integrated lead suspensions in hard disk drives. A compensation member secures to an actuated arm opposite a mount plate securing a head gimbal assembly (HGA) to the arm. The compensation member includes an elastic portion primarily mirroring the elastic properties of asymmetrical elastic properties of conductive traces extending along the HGA and arm. The elastic portion secures to an inertial portion primarily mirroring inertial properties, such as center of mass and moment of inertia, of the HGA. The elastic portion may be formed as a strip of material attached at its end points to the inertial portion. The inertial portion may be formed as a flat plate secured to the actuated arm in a manner similar to the mount plate.

Disk Drive Head Gimbal Assembly Having A Flexure Tail With Transverse Flying Leads
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US Patent:

8295014, Oct 23, 2012
Filed:

Jun 21, 2011
Appl. No.:

13/164959
Inventors:

Kia Moh Teo - San Jose CA, US
Yanning Liu - San Ramon CA, US
Tzong-Shii Pan - San Jose CA, US
Wing Chun Shum - San Mateo CA, US
Assignee:

Western Digital Technologies, Inc. - Irvine CA
International Classification:

G11B 5/127
US Classification:

3602459
Abstract:

A head gimbal assembly for a disk drive includes a read head, a load beam, and a laminate flexure. The laminate flexure includes a structural layer, a dielectric layer, and a conductive layer that includes a plurality of electrical traces. The laminate flexure includes a tongue portion that connects to the read head, and a flexure tail that extends away from the tongue portion and includes a plurality of flexure bond pads that may facilitate ultrasonic or ACF bonding. Each of the plurality of flexure bond pads consists of a widened region of a corresponding one of the plurality of electrical traces in the conductive layer, and a gold coating upon the widened region. The widened region of each of the plurality of electrical traces extends transverse to the flexure tail's longitudinal axis at least 2. 5 times more than it extends parallel to the flexure tail's longitudinal axis.

Disk Drive Head Gimbal Assembly Having A Flexure Tail With Features To Facilitate Bonding
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US Patent:

8320084, Nov 27, 2012
Filed:

Apr 1, 2011
Appl. No.:

13/078829
Inventors:

Wing C. Shum - San Mateo CA, US
Yanning Liu - San Ramon CA, US
Tzong-Shii Pan - San Jose CA, US
Kia Moh Teo - San Jose CA, US
Brian P. Schott - San Jose CA, US
Assignee:

Western Digital Technologies, Inc. - Irvine CA
International Classification:

G11B 5/48
US Classification:

3602459
Abstract:

A head gimbal assembly for a disk drive includes a read head and a suspension assembly. The suspension assembly includes a load beam and a laminate flexure. The laminate flexure includes a structural layer, a dielectric layer, and a conductive layer that includes a plurality of electrical traces. The laminate flexure includes a tongue portion that connects to the read head and a flexure tail that extends away from the tongue portion. The flexure tail includes a plurality of flexure bond pads. Each of the plurality of flexure bond pads includes a widened region of a corresponding one of the plurality of electrical traces in the conductive layer, and a corresponding one of a plurality of segments or discontinuous islands in the structural layer.

Disk Drive Head Gimbal Assembly Having A Flexure Tail With Features To Facilitate Bonding
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US Patent:

8325446, Dec 4, 2012
Filed:

Jun 21, 2011
Appl. No.:

13/164936
Inventors:

Yanning Liu - San Ramon CA, US
Wing C. Shum - San Mateo CA, US
Tzong-Shii Pan - San Jose CA, US
Kia Moh Teo - San Jose CA, US
Assignee:

Western Digital Technologies, Inc. - Irvine CA
International Classification:

G11B 5/127
US Classification:

3602459
Abstract:

A head gimbal assembly for a disk drive includes a read head and a suspension assembly. The suspension assembly includes a load beam and a laminate flexure. The laminate flexure includes a structural layer, a dielectric layer, and a conductive layer that includes a plurality of electrical traces. The laminate flexure includes a tongue portion that connects to the read head and a flexure tail that extends away from the tongue portion. The flexure tail includes a plurality of flexure bond pads. Each of the plurality of flexure bond pads includes a widened region of a corresponding one of the plurality of electrical traces in the conductive layer, and a corresponding one of a plurality of segments or discontinuous islands in the structural layer.

Suspension Assembly Having A Microactuator Bonded To A Flexure
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US Patent:

8339748, Dec 25, 2012
Filed:

Jun 29, 2010
Appl. No.:

12/826550
Inventors:

Wing C. Shum - San Mateo CA, US
Yanning Liu - San Ramon CA, US
John E. Scura - Paso Robles CA, US
Assignee:

Western Digital Technologies, Inc. - Irvine CA
International Classification:

G11B 5/55
US Classification:

3602458
Abstract:

Disclosed is a suspension assembly for a disk drive that includes: a mounting plate having a top-side and a bottom-side; a microactuator mounting structure formed in the mounting plate; a microactuator mounted in the microactuator mounting structure in which the microactuator has a top-side and a bottom-side; and a flexure attached to the bottom-side of the of mounting plate and the microactuator. The flexure includes a pad layer and a through-hole, in which the through-hole extends through the pad layer. An epoxy on the pad layer bonds widely to the microactuator and extends through the through-hole.

Suspension Assembly Having A Microactuator Electrically Connected To A Gold Coating On A Stainless Steel Surface
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US Patent:

8542465, Sep 24, 2013
Filed:

Mar 17, 2010
Appl. No.:

12/725730
Inventors:

Yanning Liu - San Ramon CA, US
Wing C. Shum - San Mateo CA, US
John E. Scura - Paso Robles CA, US
Assignee:

Western Digital Technologies, Inc. - Irvine CA
International Classification:

G11B 5/596
G11B 5/48
US Classification:

3602944, 3602459
Abstract:

A novel suspension assembly includes a suspension assembly mounting plate, a microactuator mounting structure extending from the suspension assembly mounting plate, a load beam extending from the microactuator mounting structure, and a laminated flexure attached to the load beam. The laminated flexure includes a tongue that has a read head bonding surface. The suspension assembly includes a stainless steel surface having a gold coating, and a piezoelectric microactuator attached to the microactuator mounting structure and electrically connected to the gold coating.