Aiguo Feng from San Jose, CA

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Work:

aiva technology
Fremont, CA
Chairman

Merged Read/Write Head And Method Of Fabricating Same
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US Patent:

6433968, Aug 13, 2002
Filed:

May 2, 2000
Appl. No.:

09/564301
Inventors:

Zhupei Shi - San Jose CA
Aiguo Feng - Fremont CA
Assignee:

Read-Rite Corporation - Fremont CA
International Classification:

G11B 539
US Classification:

360317
Abstract:

A merged thin film read/write head having a read element having a first shield layer, a second shield layer and a magnetoresistive element disposed between the first and second shield layers, a thin spacer layer of nonmagnetic material formed upon the second shield layer and an inductive write element having a first pole pedestal formed upon the spacer layer and a second pole separated from the pedestal by a gap. The pedestal includes a tapered portion for reducing the formation of pinned magnetic domains in the pedestal and providing improved flux passage. In combination with the thin nonmagnetic spacer layer, the tapered feature of the pedestal eliminates popcorn noise in the read element.

Method Of Making Transducer With Inorganic Nonferromagnetic Apex Region
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US Patent:

6737281, May 18, 2004
Filed:

Jan 8, 2002
Appl. No.:

10/042673
Inventors:

Xiaozhong Dang - Fremont CA
Yingjian Chen - Fremont CA
Aiguo Feng - Fremont CA
Assignee:

Western Digital (Fremont), Inc. - Fremont CA
International Classification:

H01L 2100
US Classification:

438 3, 438 73, 360 59, 360110, 360313, 360317, 360318
Abstract:

A method of making an inductive transducer having inorganic nonferromagnetic material disposed in an apex region adjacent to a submicron nonferromagnetic gap in a magnetic core. The inorganic nonferromagnetic apex region can be made by chemical etching of a layer of inorganic nonferromagnetic material, deposition of inorganic nonferromagnetic material through a mask that is then lifted-off, or anisotropic etching of a layer of inorganic nonferromagnetic material that is covered by a hardbaked photoriesist mask.

Double Winding Twin Coil For Thin-Film Head Writer
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US Patent:

6861937, Mar 1, 2005
Filed:

Jun 25, 2002
Appl. No.:

10/180161
Inventors:

Aiguo Feng - Fremont CA, US
Dennis Rafferty - San Jose CA, US
Wei Xiong - Fremont CA, US
Yiming Huai - Pleasanton CA, US
Assignee:

Western Digital (Fremont), Inc. - Lake Forest CA
International Classification:

H01F005/00
US Classification:

336200, 360122, 360123, 156649
Abstract:

An enhanced inductive coil design for use in data storage magnetic disk drives with areal density over 35 Gb/in, features a double wound twin coil that is able to achieve a yoke length of 15 μm or less by reducing the insulation spacing between the two coils. The coil further presents improved reliability by reducing the possibility of occurrence of electrical shorting. The coil is made by forming two interleafing conductors on the same layer with a demesne process. A tri-level process is implemented in the layout of the first conductor to ensure that the coil width and spacing are uniform and even, in order for the second conductor to be wound therebetween. A conformal dielectric layer of approximately 0. 1 to 0. 2 μm in thickness is deposited between the two conductors and serves as insulation. The two conductors are formed by a copper seed layer plating process that eliminates potential damage to the conductors during production.

System, Method And Apparatus For Forming Multiple Layers In A Single Process Chamber
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US Patent:

8372687, Feb 12, 2013
Filed:

Feb 16, 2011
Appl. No.:

12/932114
Inventors:

Aiguo Feng - Fremont CA, US
Assignee:

Ahbee1, LP - San Jose CA
International Classification:

H01L 21/06
H01L 21/00
H01L 21/36
H01L 29/08
US Classification:

438102, 438 98, 438503, 438509, 257 42, 257E21068
Abstract:

A method for forming multiple layers in a single process chamber includes placing a substrate in the process chamber having multiple processing sources and iteratively forming a copper indium gallium selenium (CIGS) including forming multiple relatively thin CIGS layers including forming a copper indium gallium (CIG) layer on the substrate, the CIG layer having a thickness of between less than about 50 angstroms and about 200 angstroms, forming a selenium layer on the CIG layer, the selenium layer having a thickness of between less than about 50 angstroms and about 200 angstroms and heating the substrate, the CIG layer and the selenium layer. A processing chamber system is also disclosed.

Tapered Stitch Pole Writer For High Density Magnetic Recording
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US Patent:

62820567, Aug 28, 2001
Filed:

Apr 8, 1999
Appl. No.:

9/289329
Inventors:

Aiguo Feng - Fremont CA
Zhupei Shi - San Jose CA
Bill W. Crue - San Jose CA
Assignee:

Read-Rite Corporation - Fremont CA
International Classification:

G11B 5147
US Classification:

360126
Abstract:

The present invention describes a write element for a magnetic recording device that incorporates a second pole pedestal with a tapered shape. This tapered shape substantially reduces side-writing and the second pulse effect, each of which can limit maximum areal densities of information recorded on magnetic media. The present invention further includes a magnetic recording device incorporating a write element with a tapered second pole pedestal within the read/write head. The present invention also includes a method for producing a write element incorporating a tapered second pole pedestal.

Portable Solar Panel System And Method
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US Patent:

20150207005, Jul 23, 2015
Filed:

Jan 21, 2014
Appl. No.:

14/160362
Inventors:

Aiguo Feng - Fremont CA, US
International Classification:

H01L 31/052
Abstract:

A portable solar panel system and method includes a support structure, one or more solar panels mounted on the support structure, at least three wheels coupled to the support structure and rotatably supporting the support structure on a surface, a controller, a sunlight monitor coupled to the controller and a tracking drive system coupled to the controller and mechanically linked to at least one of the at least three wheels.

Aiguo Feng