Search

Chiao-Ping Ku Phones & Addresses

  • 59 Valais Ct, Fremont, CA 94539 (510) 490-4384

Good Group

Us Patents

Glide Test Head Assembly With Enhanced Signal Output

View page
US Patent:
6363777, Apr 2, 2002
Filed:
Feb 3, 2000
Appl. No.:
09/497371
Inventors:
Alex Yu-Chih Tsay - Fremont CA
Chiao-Ping Ku - Fremont CA
Thomas R. Prentice - Luther CA
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G01B 528
US Classification:
73105
Abstract:
A glide test head assembly glide test head assembly in which the mounting orientation of the piezo element has been modified. The glide test head assembly mounts the piezo element with one of its major surfaces coincident with the surface of the laterally-extending wing on which it is mounted. The mounting orientation of the piezo element allows the piezo element to be mounted fully on the laterally-extending wing of the glide test head assembly, raising the resonant frequency of the piezo element, decreasing the glide test head assemblys sensitivity to excitation caused by air flow disturbances, and increasing the reliability of glide test results.

Advanced Glidehead Sensor For Small Slider

View page
US Patent:
6557399, May 6, 2003
Filed:
Oct 16, 2001
Appl. No.:
09/981533
Inventors:
Chiao-Ping Ku - Fremont CA
Bruno Jean Marchon - Palo Alto CA
Assignee:
Seagate Technology, LLC - Scotts Valley CA
International Classification:
G01B 734
US Classification:
73105, 29 2335
Abstract:
A disk surface asperities tester including a glidehead member having a piezoelectric sensor fabricated directly on the glidehead member. The piezoelectric sensors are useful in applications utilizing 70%, 50%, 30%, or smaller glideheads. The invention discloses a method for manufacturing sensors utilizing microchip fabrication techniques to form the piezoelectric sensors directly on glidehead surfaces, including standard Al O. TiC glideheads. The fabricated piezoelectric sensors are used in combination with signal processors to detect and analyze asperities in a disk drive surface.

Disk Drive Having Airflow Suppressor Comb For Reduced Disk Rotation Induced Airflow

View page
US Patent:
6624966, Sep 23, 2003
Filed:
May 31, 2001
Appl. No.:
09/872193
Inventors:
Jin Hui Ou-Yang - San Jose CA
Serge Hauert - San Jose CA
John R. Gustafson - Los Gatos CA
Chiao-Ping Ku - Fremont CA
Lin Yang - San Jose CA
Gary C. Griffin - Boulder Creek CA
Aaron D. Little - Campbell CA
Sudha Narayanan - San Jose CA
Assignee:
Western Digital Technologies, Inc. - Lake Forest CA
International Classification:
G11B 3314
US Classification:
360 9702
Abstract:
A disk drive including a disk drive base. The disk drive further includes at least one rotatable disk which includes a disk surface extending to an outer disk edge. The disk drive further includes a head stack assembly rotatably attached to the disk drive base in operable communication with the disk. The disk drive further includes an airflow suppressor comb coupled to the disk drive base and stationary relative to the disk drive base during operation of the disk drive. The comb includes a comb body disposed adjacent to the outer disk edge, and at least one tine extending from the comb body along the disk surface for mitigating disk rotation induced airflow upon the head stack assembly adjacent to the disk surface.

Media Contact Zone With Bell-Shaped Texturing Features

View page
US Patent:
6663938, Dec 16, 2003
Filed:
Dec 11, 1998
Appl. No.:
09/210018
Inventors:
Wei H. Yao - Fremont CA
Yuh-Jen Cheng - Cupertino CA
Li-Ping Wang - Fremont CA
David S. Kuo - Castro Valley CA
Chiao-Ping Ku - Fremont CA
Bruno Marchon - Palo Alto CA
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B 582
US Classification:
428141, 428 642, 428 653, 428426, 428694 SG, 360135
Abstract:
A magnetic data recording medium substrate has a contact zone and a data zone. The contact zone is textured by forming multiple texturing features, each having a bell-shaped profile resembling a Gaussian curve. The features preferably are formed by pulsed laser energy applied to a glass substrate, or to an aluminum nickel-phosphorous substrate coated with a glass layer. As compared to previous laser texturing approaches, the laser beam is less narrowly focused to provide a beam impingement area with a diameter of at least three microns, forming texturing features with diameters of at least three microns. The texturing features preferably are uniform in height and diameter, and may be symmetrical or have asymmetrical aspects, so long as bell-shaped profiles are present in the direction of travel of the recording medium, relative to transducing heads.

Suspension Design For Attenuation Of Disk Flutter Induced Track Mis-Registration Of A Hard Disk Drive By Manipulation Of Load Beam Pitch Angle

View page
US Patent:
6965500, Nov 15, 2005
Filed:
Feb 22, 2002
Appl. No.:
10/080786
Inventors:
Aaron J. Hanna - San Jose CA, US
Lin Yang - San Jose CA, US
Jin Hui Ou-Yang - San Jose CA, US
Chiao-Ping R. Ku - Fremont CA, US
Assignee:
Western Digital Technologies, Inc. - Lake Forest CA
International Classification:
G11B005/55
US Classification:
360245, 3602451, 3602453
Abstract:
A disk drive includes a head gimbal assembly that includes structure that decreases the pitch angle of the load beam, which decreases disk flutter induced track mis-registration. According to one embodiment, the disk drive includes a body portion including a bore defining a pivot axis; an actuator arm cantilevered from the body portion and a head gimbal assembly (HGA) supported at the actuator arm. The HGA includes a load beam having a first end and a second end, the first end being attached to the actuator arm, the load beam defining a load beam feature near the second end, at least a portion of the load beam feature defining an extension that is parallel to the pivot axis and that has a rectangular cross-section having a length to width aspect ratio that is greater than 1. A slider is coupled to a free end of the load beam extension, and a gimbal coupled to the second end of the load beam and to the slider.

Suspension Design For Attenuation Of Disk Flutter Induced Track Mis-Registration Of A Hard Disk Drive By Manipulation Of The Hinge And/Or Load Beam

View page
US Patent:
7113371, Sep 26, 2006
Filed:
Feb 22, 2002
Appl. No.:
10/080849
Inventors:
Aaron J. Hanna - San Jose CA, US
Lin Yang - San Jose CA, US
Jin Hui Ou-Yang - San Jose CA, US
Chiao-Ping R. Ku - Fremont CA, US
Assignee:
Western Digital Technologies, Inc. - Lake Forest CA
International Classification:
G11B 5/48
G11B 21/16
US Classification:
3602448, 3602442
Abstract:
Disk drives including suspensions and head gimbal assemblies in which the load beam pitch angle is reduced exhibit a reduced disk flutter induced track mis-registration (TMR) at the disk outer diameter. The reduction in the load beam pitch angle may be achieved through variations in the load beam, hinge and/or mount plate configurations, relative positions and/or thickness.

Disk Drive Having Apertures Near The Id Of A Disk Stack For Allowing Airflow To Pass Through The Apertures To Reduce Disk Flutter

View page
US Patent:
7212377, May 1, 2007
Filed:
Mar 31, 2004
Appl. No.:
10/815507
Inventors:
Jin Hui Ou-Yang - San Jose CA, US
Lin Yang - San Jose CA, US
Chiao-Ping R. Ku - Fremont CA, US
Assignee:
Western Digital Technologies, Inc. - Lake Forest CA
International Classification:
G11B 17/038
G11B 25/04
G11B 33/14
US Classification:
360 9912, 360 9703, 360 9801, 360 9808
Abstract:
A disk drive includes a disk clamp for clamping a plurality of disks to a spindle motor, and a disk spacer positioned between first and second disks. The first disk has a plurality of first disk through apertures adjacent its inner diameter. The first disk through apertures are circumferentially spaced-apart and extend longitudinally through the first disk. The disk spacer has a plurality of spacer apertures that are circumferentially spaced-apart and extend longitudinally through a portion of a thickness of the disk spacer. The disk clamp is adjacent to the first disk and has a plurality of clamp through apertures adjacent an outer diameter of the disk clamp. The clamp through apertures are circumferentially spaced-apart and extend longitudinally through the disk clamp. The first disk through apertures, the spacer apertures, and the clamp through apertures are aligned for allowing airflow to pass through when the plurality of disks is rotating.

Disk Drive Having Apertures Aligned Near The Inner Diameter Of A Disk Stack For Allowing Airflow To Pass Through The Apertures To Reduce Disk Flutter

View page
US Patent:
7224551, May 29, 2007
Filed:
May 15, 2004
Appl. No.:
10/846041
Inventors:
Jin Hui Ou-Yang - San Jose CA, US
Lin Yang - San Jose CA, US
Chiao-Ping Ku - Fremont CA, US
Assignee:
Western Digital Technologies, Inc. - Lake Forest CA
International Classification:
G11B 17/02
US Classification:
360 9808, 360 9703
Abstract:
A disk drive includes a base, a spindle motor attached to the base, the spindle motor including a hub having hub apertures, a plurality of disks on the spindle motor and including a first and a second disk, a disk spacer between the first and second disks, and a disk clamp. The disk spacer has a plurality of spacer through apertures. Each of the spacer through apertures extend radially through the disk spacer. The disk clamp has clamp through apertures adjacent to an inner diameter of the disk clamp. Each of the clamp through apertures extend longitudinally through the disk clamp. The clamp through apertures, the hub apertures and the spacer through apertures are aligned for allowing airflow to pass through the apertures when the disks are rotating.
Chiao-Ping Ku from Fremont, CA Get Report