Yuan Li

US Patent:

6351581, Feb 26, 2002

Filed:

Mar 17, 1998

Appl. No.:

09/040477

Inventors:

Christopher Richard Doerr - Middletown NJ
Yuan P. Li - Duluth GA

Assignee:

Agere Systems Optoelectronics Guardian Corp. - Orlando FL

International Classification:

G02B 626

US Classification:

385 24, 359124

Abstract:

An optical add-drop multiplexer (ADM) avoids waveguide crossings by being constructed in the form of a Mach-Zehnder interferometer having a demultiplexer/multiplexer (demux/mux) pair in each of its arms. Each demux/mux pair is interconnected by coherent connecting paths having heating elements for increasing the path length of selected connecting paths. Waveguide optical couplers having asymmetric transfer functions are used at the input and output of the ADM. These couplers cooperate with the activated heating elements to add and/or delete a selected optical channel to/from an optical transmission path. Each coherent connecting path includes a number of waveguides. The end-to-end transmission characteristic of the ADM through each individual waveguide has a Gaussian shape. These Gaussian shapes are designed intersect at their -3 dB wavelengths so that the end-to-end transmission characteristic of the ADM is flat.

US Patent:

8198699, Jun 12, 2012

Filed:

Apr 19, 2010

Appl. No.:

12/762958

Inventors:

Yuanlin Xie - Fremont CA, US
Yuan Li - Sunnyvale CA, US

Assignee:

Altera Corporation - San Jose CA

International Classification:

H01L 21/70

US Classification:

257499, 257E2117, 257E2302

Abstract:

Provided is an IC package. In one implementation, the IC package includes a metal pad having a first metal pad surface and a second metal pad surface substantially parallel to the first metal pad surface; a first dielectric layer having a first surface, a second surface, and a third surface, where the first dielectric layer covers a first end portion of the second metal pad surface, and the third surface of the first dielectric layer is substantially parallel to the first and second surfaces of the first dielectric layer; a second dielectric layer having a first surface, a second surface, and a third surface, where the second dielectric layer covers a second end portion of the second metal pad surface, and the third surface of the second dielectric layer is substantially parallel to the first and second surfaces of the second dielectric layer; and a metal structure covering a middle portion of the second metal pad surface, a first end portion of the third surface of the first dielectric layer, and a first end portion of the third surface of the second dielectric layer.

US Patent:

8536777, Sep 17, 2013

Filed:

Aug 29, 2012

Appl. No.:

13/597739

Inventors:

Yuan Qiang Li - Plainsboro NJ, US
Michael D. Romanelli - North Plainfield NJ, US
Yongchi Tian - Princeton Junction NJ, US

Assignee:

Lightscape Materials, Inc. - Princeton NJ

International Classification:

H01J 1/63
C09K 11/79
C09K 11/65

US Classification:

313503, 2523014 F, 2523016 F

Abstract:

A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.

US Patent:

20030190618, Oct 9, 2003

Filed:

Mar 6, 2002

Appl. No.:

10/092885

Inventors:

Babru Samal - N. Potomac MD, US
Yuan Li - Rockville MD, US
Leandro Hermida - Germantown MD, US
Nancy Hoppa - Westminster MD, US
Karl Johe - Potomac MD, US

International Classification:

C12Q001/68
C12P019/34

US Classification:

435/006000, 435/091200

Abstract:

A method for generating five prime biased tandem tag libraries of cDNAs is revealed. The method allows generation of partial sequences consisting of a minimal length of expressed cDNA sequences of at least 20 bases from biological samples to rapidly identify novel expressed transcripts.

US Patent:

20140015400, Jan 16, 2014

Filed:

Jul 13, 2012

Appl. No.:

13/548492

Inventors:

Yuan Qiang Li - Plainsboro NJ, US
Michael D. Romanelli - North Plainfield NJ, US
Yongchi Tian - Princeton Junction NJ, US

Assignee:

Rohm and Haas Electronic Materials LLC - Marlborough MA

International Classification:

C09K 11/77

US Classification:

313503, 2523014 F

Abstract:

A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.

US Patent:

20140062287, Mar 6, 2014

Filed:

Aug 29, 2012

Appl. No.:

13/597633

Inventors:

Yuan Qiang Li - Plainsboro NJ, US
Michael D. Romanelli - North Plainfield NJ, US
Yongchi Tian - Princeton Junction NJ, US

Assignee:

LIGHTSCAPE MATERIALS, INC. - Princeton NJ

International Classification:

C09K 11/77
H05B 33/12

US Classification:

313503, 2523014 F

Abstract:

A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.

US Patent:

20140062288, Mar 6, 2014

Filed:

Aug 31, 2012

Appl. No.:

13/601489

Inventors:

Yuan Qiang Li - Plainsboro NJ, US
Michael D. Romanelli - North Plainfield NJ, US
Yongchi Tian - Princeton Junction NJ, US

Assignee:

LIGHTSCAPE MATERIALS, INC. - Princeton NJ

International Classification:

C09K 11/77
H05B 33/12

US Classification:

313503, 2523014 F

Abstract:

A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.

US Patent:

55966616, Jan 21, 1997

Filed:

Dec 28, 1994

Appl. No.:

8/365618

Inventors:

Charles H. Henry - Skillman NJ
Edward J. Laskowski - Scotch Plains NJ
Yuan P. Li - Alpharetta GA
Cecilia Y. Mak - Bedminster NJ
Henry H. Yaffe - Dunwoody GA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

C02B 628

US Classification:

385 24

Abstract:

In accordance with the invention, a new type of monolithic optical waveguide filter comprises a chain of optical couplers of different effective lengths linked by differential delays of different lengths. The transfer of the chain of couplers and delays is the sum of contributions from all possible optical paths, each contribution forming a term in a Fourier series whose sum forms the optical output. A desired frequency response is obtained by optimizing the lengths of the couplers and the delay paths so that the Fourier series best approximates the desired response. The filter is advantageously optimized so that it is insensitive to uncontrolled fabrication errors and is short in length. The wavelength dependence of practical waveguide properties is advantageously incorporated in the optimization. Consequently, the filter is highly manufacturable by mass production.