Wei J Wu

US Patent:

7050659, May 23, 2006

Filed:

Mar 31, 2005

Appl. No.:

11/096670

Inventors:

R. Stanley Williams - Portola Valley CA, US
Raymond G. Beausoleil - Redmond WA, US
Wei Wu - Mountain View CA, US
Zhiyong Li - Palo Alto CA, US
Philip J. Kuekes - Menlo Park CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G02F 1/295

US Classification:

385 5, 385 14

Abstract:

Controlling the propagation of electromagnetic radiation is described. A photonic bandgap medium is placed in the path of the electromagnetic radiation, the photonic bandgap medium comprising a photorefractive material. Control radiation is projected onto a surface of the photonic bandgap medium. The control radiation spatially varies a refractive index of the photorefractive material to control propagation of the electromagnetic radiation through the photonic bandgap medium.

US Patent:

7085673, Aug 1, 2006

Filed:

Aug 31, 2004

Appl. No.:

10/930614

Inventors:

Carl E. Picciotto - Menlo Park CA, US
Jun Gao - Mountain View CA, US
Wei Wu - Mountain View CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G01B 21/02
G06K 9/32

US Classification:

702158, 382294

Abstract:

A displacement estimation system including a data acquisition system and a processing system is provided. The data acquisition system is configured to capture a first frame from a first substrate including a first pattern and a second substrate including a second pattern at a first time and capture a second frame from a third substrate including a third pattern and a fourth substrate including a fourth pattern at a second time subsequent to the first time. The first pattern and the third pattern are substantially identical, and the second pattern and the fourth pattern are substantially identical. The processing system is configured to calculate a first displacement between the first pattern and the third pattern using the first frame and the second frame and calculate a second displacement between the second pattern and the fourth pattern using the first frame and the second frame.

US Patent:

7205941, Apr 17, 2007

Filed:

Aug 30, 2004

Appl. No.:

10/931148

Inventors:

Shih-Yuan Wang - Palo Alto CA, US
Philip J Kuekes - Menlo Park CA, US
Wei Wu - Mountain View CA, US
Joseph Straznicky - Santa Rosa CA, US
M. Saiful Islam - Mountain View CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H01Q 1/38
H01Q 15/02

US Classification:

343700MS, 343909

Abstract:

A composite material and related methods are described, the composite material being configured to exhibit a negative effective permittivity and/or a negative effective permeability for incident radiation at an operating wavelength, the composite material comprising an arrangement of electromagnetically reactive cells of small dimension relative to the operating wavelength. Each cell includes an externally powered gain element for enhancing a resonant response of that cell to the incident radiation at the operating wavelength.

US Patent:

7226797, Jun 5, 2007

Filed:

Nov 23, 2004

Appl. No.:

10/995837

Inventors:

William M. Tong - San Francisco CA, US
Wei Wu - Mountain View CA, US
Jun Gao - Saratoga CA, US
Carl E. Picciotto - Menlo Park CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H01L 21/00

US Classification:

438 5, 438401, 700121

Abstract:

Using an imaging system in relation to a plurality of material layers in an initial alignment state is provided, a first of the plurality of material layers at least partially obscuring a second of the plurality of material layers in the initial alignment state. The first material layer is moved from a first position corresponding to the initial alignment state to a second position out of a field of view of the imaging system, and a first image of the second material layer is stored. The first material layer is moved back the first position to restore the initial alignment state. A second image of the first material layer is acquired. The second image and the stored first image are processed to determine the initial alignment state.

US Patent:

7307345, Dec 11, 2007

Filed:

Nov 1, 2005

Appl. No.:

11/264464

Inventors:

Wei Wu - Mountain View CA, US
Philip J. Kuekes - Menlo Park CA, US
R. Stanley Williams - Portola Valley CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H01L 23/528

US Classification:

257758, 257211, 257208, 257E23151, 977762, 977932

Abstract:

Various embodiments of the present invention are directed to crossbar array designs that interfaces wires to address wires, despite misalignments between electrical components and wires. In one embodiment, a nanoscale device may be composed of a first layer of two or more wires and a second layer of two or more address wires that overlays the first layer. The nanoscale device may also include an intermediate layer positioned between the first layer and the second layer. Two or more redundant electrical component patterns may be fabricated within the intermediate layer so that one or more of the electrical component patterns is aligned with the first and second layers.

US Patent:

7315663, Jan 1, 2008

Filed:

Jun 10, 2005

Appl. No.:

11/150332

Inventors:

Wei Wu - Mountain View CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G02F 1/295

US Classification:

385 9, 385 4, 385 16

Abstract:

Various embodiments of the present invention are directed to photonic crystal switches. In one embodiment, a photonic crystal switch a photonic crystal switch includes a photonic-crystal-based light transmission layer that outputs an incident light beam in a selected, output direction. The photonic crystal switch may include two or more electrical contacts, positioned relative to the light transmission layer, to which a voltage is applied to select the output direction of the light beam.

US Patent:

7342389, Mar 11, 2008

Filed:

Jan 9, 2007

Appl. No.:

11/651219

Inventors:

Wei Wu - Cupertino CA, US
Ling Zhu - San Diego CA, US

Assignee:

Diodes, Inc. - Westlake Village CA

International Classification:

G05F 1/40
H02M 3/18

US Classification:

323288, 363 60

Abstract:

In one embodiment the present invention includes a voltage converter operable in both buck and boost modes. The voltage converter may only include one switched capacitor. A programmable current source, which may be implemented as a switch array, generates a current into the switch capacitor during a first time period to produce a voltage across the capacitor. During a second time period, the voltage may be transferred to the output of the converter, or boosted by coupling the input voltage to one terminal of the switched capacitor coupling the other terminal of the capacitor to the output. A feedback circuit is coupled to a controller for reprogramming the current into the capacitor to maintain the output voltage at desired levels.

US Patent:

7359048, Apr 15, 2008

Filed:

Apr 28, 2006

Appl. No.:

11/413910

Inventors:

Shih-Yuan Wang - Palo Alto CA, US
R. Stanley Williams - Palo Alto CA, US
Raymond G. Beausoleil - Palo Alto CA, US
Theodore I. Kamins - Palo Alto CA, US
Zhiyong Li - Palo Alto CA, US
Wei Wu - Palo Alto CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G01J 3/44
G01N 21/65

US Classification:

356301, 356454, 356519

Abstract:

Raman systems include a radiation source, a radiation detector, and a Raman device or signal-enhancing structure. Raman devices include a tunable resonant cavity and a Raman signal-enhancing structure coupled to the cavity. The cavity includes a first reflective member, a second reflective member, and an electro-optic material disposed between the reflective members. The electro-optic material exhibits a refractive index that varies in response to an applied electrical field. Raman signal-enhancing structures include a substantially planar layer of Raman signal-enhancing material having a major surface, a support structure extending from the major surface, and a substantially planar member comprising a Raman signal-enhancing material disposed on an end of the support structure opposite the layer of Raman signal-enhancing material. The support structure separates at least a portion of the planar member from the layer of Raman signal-enhancing material by a selected distance of less than about fifty nanometers.

Author:

Wei Wu

ISBN #:

0824703308

Author:

Wei Wu

ISBN #:

3540251359