Jifang Tian

7773346, Aug 10, 2010

Mar 14, 2006

11/375169

Wei Guo - Fremont CA, US
Jifang Tian - Fremont CA, US

Seagate Technology LLC - Scotts Valley CA

G11B 5/60

3602944

A disk drive includes a drive circuitry, a storage disk and a slider. The storage disk has a data surface, and the slider magnetically interacts with the storage disk to transmit a signal between the storage disk and the drive circuitry. The slider includes a leading surface, an opposed trailing surface, a data transducer positioned near the trailing surface, and a piezoelectric element. The piezoelectric element receives a driving voltage from the drive circuitry to adjust a distance between the data transducer and the data surface. The piezoelectric element can form a portion of the trailing surface. The slider includes a slider body that forms a portion of the trailing surface, and a portion of the piezoelectric element can be coplanar with the portion of the trailing surface formed by the slider body. Further, at least a portion of the piezoelectric element can be constrained by the slider body. The piezoelectric element can include an exposed surface that is substantially parallel with the leading surface.

7813083, Oct 12, 2010

Jan 17, 2007

11/654480

Wei Guo - Fremont CA, US
Yanchu Xu - San Jose CA, US
Jifang Tian - Fremont CA, US

Maxtor Corporation - Scotts Valley CA

G11B 21/02

3602459

A load arm for a disk drive may include a base section that has an opening for receiving a spindle of a voice coil motor. The base section may have hinge arms that extend from the base section and terminate in tab portions. An arm section may be affixed to the tabs of the hinge arms of the base section such as by spot welding. A head suspension assembly may be affixed to a distal end of the arm section such as by spot welding. A sensor may be provided on a hinge arm of the base section. The sensor may comprise a piezoelectric polymer sensing element and an electrode formed over the piezoelectric polymer sensing element.

7848058, Dec 7, 2010

Aug 30, 2007

11/897699

Fu-Ying Huang - San Jose CA, US
Jifang Tian - Fremont CA, US

Hitachi Global Storage Technologies, Netherlands, B.V. - Amsterdam

G11B 21/02

3602658, 360265

A voice coil for a voice coil motor of a hard disk drive comprises an inner surface of the voice coil, which bounds a central space of the voice coil. A first outer surface of the voice coil is substantially parallel to a second outer surface of the voice coil. A constrained layer damper is attached to the inner surface of the voice coil by a coupler. The constrained layer damper comprises a first constraining layer coupled to a first surface of a viscoelastic damping layer. A second constraining layer is coupled to a second surface of the viscoelastic damping layer. The constrained layer damper is curved in a direction that is substantially perpendicular to the first outer surface of the voice coil and the second outer surface of the voice coil.

7976221, Jul 12, 2011

Apr 17, 2007

11/787904

Fu-Ying Huang - San Jose CA, US
Jifang Tian - Fremont CA, US

Hitachi Global Storage Technologies, Netherlands B.V. - Amsterdam

F16C 32/06

384107, 384100

A system and method for improving lubrication in a fluid dynamic bearing are disclosed. A fluid dynamic bearing is formed. The fluid dynamic bearing comprises a shaft having an axis of rotation and a surface comprising a first groove at a first depth and a second groove at a second depth, wherein the first and second grooves are for supporting a film of lubricating fluid. The fluid dynamic bearing further includes a hub having an axis coincident to the axis of rotation and a complimentary surface juxtaposed to the shaft which is conducive to supporting the lubricating fluid such that the shaft is rotatably retained.

8027123, Sep 27, 2011

Dec 19, 2007

12/004743

Jeffery Kerner - San Jose CA, US
Jifang Tian - Fremont CA, US

Hitachi Global Storage Technologies, Netherlands, B.V. - Amsterdam

G11B 33/04

360 9702

A windage blocker integrated with a base for a hard disk drive is disclosed. One embodiment provides a cavity portion comprising a planar surface defining an inner bottom surface of the cavity, the cavity portion for receiving an actuator assembly, the actuator assembly comprising a flex cable. The cavity includes at least one windage blocker integrated with the planar surface of the cavity of the base, the windage blocker for reducing detrimental local excitation of an airflow encountering the flex cable.

8040639, Oct 18, 2011

Mar 28, 2007

11/729057

Toshiki Hirano - San Jose CA, US
Fu-Ying Huang - San Jose CA, US
Jifang Tian - Fremont CA, US

Hitachi Global Storage Technologies, Netherlands B.V. - Amsterdam

G11B 5/54

3602944

An integrated microactuator slider. The microactuator includes a substrate having a fixed portion and a moveable portion. The microactuator also includes a slider communicatively integrated within the moveable portion of the substrate. The slider includes a read/write head for reading data from or writing data to a data storage device. The microactuator further includes a force generator communicatively integrated within the substrate. The force generator is for causing movement of the moveable portion of the substrate.

8125740, Feb 28, 2012

May 11, 2010

12/778033

Jian Yang - Fremont CA, US
Jifang Tian - Fremont CA, US
Qiang Yang - Fremont CA, US
Hongqi Li - Redwood City CA, US

Western Digital Technologies, Inc. - Irvine CA

G11B 21/02

3602658

A disk drive has an actuator coil that includes first and second lateral legs joined by first and second longitudinal legs to form a closed coil periphery. The first lateral leg is disposed closer to the actuator pivot bore than the second lateral leg. The first and second longitudinal legs join the second lateral leg at a first interior bend location and at a second interior bend location within the closed coil periphery, respectively. A bobbin is disposed within the closed coil periphery and contacts the conductive coil at two locations (e. g. the first interior bend location and the second interior bend location). Preferably, the bobbin defines a total bobbin length and an average bobbin width, and the total bobbin length is at least 3 times the average bobbin width.

8194347, Jun 5, 2012

Aug 30, 2007

11/897712

Ferdinand Hendriks - Morgan Hill CA, US
Fu-Ying Huang - San Jose CA, US
Chiaoping Ku - Fremont CA, US
Jifang Tian - Fremont CA, US

Hitachi Global Storage Technologies, Netherlands B.V. - Amsterdam

F16C 32/06
G11B 17/02
F16C 33/74

360 9908, 360 9807, 384119, 384118, 384120, 384132

A contoured region is disposed within a capillary buffer of a Fluid Dynamic Bearing. In one embodiment, the contoured region comprises at least one defined edge for arresting the displacement of a lubricant within the capillary buffer.