Liji Te Huang, 6152 Paterson Pl, Santa Clara, CA 95050

6416881, Jul 9, 2002

May 15, 2000

09/571506

Lin Huang - San Jose CA
Liji Huang - San Jose CA
Qixu David Chen - Milpitas CA
Charles Leu - Fremont CA
Rajiv Yadav Ranjan - San Jose CA

Seagate Technology LLC - Scotts Valley CA

G11B 564

428611, 428640, 428666, 428332, 428694 TS, 428701, 428900, 2041922

Sputter-deposited amorphous metal oxide films on substrates comprising an aluminum-containing support and a Ni-containing pre-coat reduce Ni ion migration significantly from the substrate onto the top surface of the magnetic recording media. Longitudinal magnetic recording media deposited on metal oxide sealing layers have very good magnetic recording performances and are suitable for high density recording application.

6565718, May 20, 2003

Sep 6, 2001

09/946934

Liji Huang - San Jose CA
Jie-Ming Yu - Pleasanton CA
Kuo-Hsing Hwang - San Jose CA
Chung Shih - Cupertino CA

Seagate Technology LLC - Scotts Valley CA

G11B 5851

20419215, 20419216, 427131

A magnetic recording medium is formed with dual carbon-containing protective layers having a combined thickness of less than about 100 with high corrosion resistance and superior magnetic performance. Embodiments of the present invention include sputter depositing a first protective layer of hydrogenated carbon at a density of at least 1. 9 while applying a DC bias of about 250V to about 400V to the substrate, and sputter depositing a second protective layer comprising nitrogen-doped hydrogenated carbon on the first protective layer.

6509998, Jan 21, 2003

Jun 7, 2001

09/877367

Liji Huang - San Jose CA
Jian Li - Sunnyvale CA
Naiqian Han - Sunnyvale CA
James Yang - Stanford CA

INTPAX, Inc. - Cupertino CA

G02F 103

359245, 359247, 359248, 359290, 359291, 372 12, 372 20, 372 43

A conductive substrate supports an array of multi-channel optical attenuating devices. Each attenuating device includes a membrane with an optically transparent portion And a flexible support for positioning the optically transparent portion of the membrane spaced from the substrate for defining an air gap. The air gap constitutes a cross-shaped gap-chamber having a horizontally and vertically elongated chambers extended from a central intersection area functioning as an optical active area. A voltage bias circuit applies an electrical bias between the conductive substrate and the membrane to adjust and control an air-gap thickness at the optical active area between the conductive substrate and the membrane. Each of the devices can be manufactured on the same silicon wafer using the same process and can be individually controlled to accommodate different wavelength attenuation at each channel. Production costs, and time and efforts required for aligning the array to optical fibers are also reduced.

6556338, Apr 29, 2003

Nov 2, 2001

10/003811

Naiqian Han - Sunnyvale CA
Liji Huang - San Jose CA

Intpax, Inc. - Cupertino CA

G02B 2608

359298, 359290, 359291, 359295, 385140

The present invention discloses an optimized optical attenuator device. It includes the design of resonator formed by two identical mirrors, which are made by MEMS process. The structure realizes the minimum insertion loss. The two membranes are chosen to be with high reflection rate. Multiple layer or metal layer or mixture of them can produce membrane of high reflection rate. High reflection rate causes low tuning voltage for one certain attenuation range.

6572958, Jun 3, 2003

Jul 21, 2000

09/621530

Liji Huang - San Jose CA
Jie-Ming Yu - Pleasanton CA
Kuo-Hsing Hwang - San Jose CA
Chung Shih - Cupertino CA
Lin Huang - San Jose CA
Charles Leu - Fremont CA
Qixu Chen - Milpitas CA
Rajiv Yadav Ranjan - San Jose CA

Seagate Technology LLC - Scotts Valley CA

G11B 572

428213, 428336, 428694 TP, 428694 TC, 428698, 2041925, 2041926, 427131, 42724915

A magnetic recording medium is provided with a dual layer protective overcoat system comprising a SiC corrosion barrier layer and a carbon-containing protective overcoat thereon. The SiC layer effectively prevents or significantly reduces Co and Ni diffusion to the medium surface. Embodiments include magnetic recording media comprising a SiC corrosion barrier layer over a magnetic layer, an overlying protective layer of amorphous hydrogenated carbon, amorphous nitrogenated carbon or amorphous hydrogen-nitrogenated carbon, and a lubricant topcoat thereon. Embodiments of the present invention further include magnetic recording media comprising NiâP plated aluminum, Ni-plated glass or non-conductive substrates including glass, glass-ceramic and ceramic materials. Embodiments of the present invention further include a dual protective overcoat system having a combined thickness less than about 100 , such as less than about 75 , e. g. , less than about 50 , with the SiC corrosion barrier layer having a thickness ranging from 1 to 40.

6620712, Sep 16, 2003

Nov 12, 2001

10/011350

Liji Huang - San Jose CA
Naiqian Han - Cupertino CA
Yahong Yao - Cupertino CA
Gaofeng Wang - Sunnyvale CA

INTPAX, Inc. - Cupertino CA

H01L 2100

438519, 438 29, 438 31, 438 45, 438 48, 438480, 438506, 438510, 438514, 438527, 438529, 257 98, 385 1, 385 2, 385 14, 385129, 385130, 385131

The present invention discloses an electro-optical device support on a substrate. The electro-optical device includes a sacrificial layer disposed on the substrate having a chamber-wall region surrounding and defining an optical chamber. The electro-optical device further includes a membrane layer disposed on top of the sacrificial layer having a chamber-removal opening surrounding and defining an electric tunable membrane for transmitting an optical signal therethrough. The electrically tunable membrane disposed on top of the optical chamber surrounded by the chamber wall regions. The chamber-wall region is doped with ion-dopants for maintaining the chamber-wall region for removal-resistance under a chamber-forming process performed through the chamber-removal opening. In a preferred embodiment, the chamber-wall region is a doped silicon dioxide region with carbon or nitrogen. In another preferred embodiment, the chamber-wall region is a nitrogen ion-doped SiNxOy region.

6641932, Nov 4, 2003

Jun 28, 2001

09/892626

Weilu Xu - San Jose CA
Yuanda R. Cheng - Singapore, SG
Taesun Ernest Kim - San Jose CA
Chung Shih - Cupertino CA
Liji Huang - San Jose CA
Kueir Weii Chour - San Jose CA
Steve Hwang - San Jose CA
Roger Shih - Cupertino CA

Seagate Technology, LLC - Scotts Valley CA

G11B 566

428666, 428457, 428336, 428667, 428694 TP

A flash chromium capping layer is deposited on a magnetic layer for improved corrosion resistance, reduced poisoning due to the absence of a protective overcoat or presence of discontinuities in a protective overcoat, and for reduced media noise do to inter-granular exchange coupling. Embodiments include depositing a flash chromium layer having a thickness up to about 10 on an upper magnetic layer and depositing an overlying lubricant topcoat. An optional protective overcoat, such as a carbon-containing protective overcoat, can also be deposited on the chromium capping layer. The chromium capping layer forms a protective oxide coating where exposed, as due to the absence of or at discontinuities in the protective overcoat.

6699588, Mar 2, 2004

Apr 27, 2000

09/559347

Qixu (David) Chen - Milpitas CA
Liji Huang - San Jose CA
Charles Leu - Fremont CA
Rajiv Yadav Ranjan - San Jose CA

Seagate Technology, Inc. - Scotts Valley CA

G11B 565

428611, 428663, 428668, 428333, 428694 TS, 427129, 2041922

Sputter-deposited amorphous NiNb films on glass or glass-ceramic substrates have good adhesion with the substrates, and reduce lithium migration significantly. Longitudinal magnetic recording media deposited on oxidized NiNb sealing layers have very good magnetic recording performances and are suitable for high density recording application.