Helen X Liu

US Patent:

20120073650, Mar 29, 2012

Filed:

Sep 24, 2010

Appl. No.:

12/890428

Inventors:

David Smith - Campbell CA, US
Helen Liu - El Cerrito CA, US
Tim Dennis - Canton TX, US
Jane Manning - Woodside CA, US
Ann Waldhauer - La Honda CA, US
Genevieve A. Solomon - Palo Alto CA, US
Brenda Pagulayan Malgapu - Cavite, PH
Joseph Ramirez - Batangas City, PH

International Classification:

H01L 31/0368
H01L 31/0376
H01L 31/18

US Classification:

136258, 438 97, 438 96, 257E31043, 257E31047

Abstract:

Methods of fabricating emitter regions of solar cells are described. Methods of forming layers on substrates of solar cells, and the resulting solar cells, are also described.

US Patent:

20200074617, Mar 5, 2020

Filed:

Aug 26, 2019

Appl. No.:

16/551155

Inventors:

- Milpitas CA, US
Helen Heng Liu - Fremont CA, US

International Classification:

G06T 7/00
G01N 21/88

Abstract:

An inspection system may include a controller coupled to a differential interference contrast imaging tool for generating images of a sample based on illumination with two sheared illumination beams. The controller may determine a first defect-induced phase shift based on a first set of images of a defect on the sample with a first selected illumination spectrum and two or more selected induced phase differences between the two sheared illumination beams, determine a second defect-induced phase shift based a second set of images of the defect with a second selected illumination spectrum and two or more selected induced phase differences between the two sheared illumination beams, and classify the defect as a metal or a non-metal based on a comparison of the first phase shift to the second phase shift.

US Patent:

20190166109, May 30, 2019

Filed:

Nov 30, 2017

Appl. No.:

15/827368

Inventors:

- Palo Alto CA, US
Zhen MO - Palo Alto CA, US
Fang PENG - Palo Alto CA, US
Bo HU - Palo Alto CA, US
Helen LIU - Palo Alto CA, US

International Classification:

H04L 29/06
H04L 9/06
H04L 9/08
H04L 9/14

Abstract:

Certain embodiments described herein are generally directed to methods and apparatus for providing a security parameter index (SPI) value for use in establishing a security association between a source tunnel endpoint and a destination tunnel endpoint. In some embodiments, utilization of the SPI bit space is optimized to allow the scaling of key policies within a network. In some embodiment, using an SPI derivation formula, a server in the network is able to generate SPI values whose bit spaces are optimized to allow key policies to scale out.

US Patent:

20170263795, Sep 14, 2017

Filed:

May 22, 2017

Appl. No.:

15/601929

Inventors:

- San Jose CA, US
Helen Liu - El Cerrito CA, US
Tim Dennis - Canton TX, US
Jane Manning - Woodside CA, US
Hsin-Chiao Luan - Palo Alto CA, US
Ann Waldhauer - La Honda CA, US
Genevieve A. Solomon - Palo Alto CA, US
Brenda Pagulayan Malgapu - Carmona, PH
Joseph Ramirez - Batangas City, PH

International Classification:

H01L 31/0368
H01L 31/20
H01L 31/18
H01L 31/0376
H01L 31/0216

Abstract:

Methods of fabricating emitter regions of solar cells are described. Methods of forming layers on substrates of solar cells, and the resulting solar cells, are also described.

US Patent:

20140376546, Dec 25, 2014

Filed:

Jun 20, 2013

Appl. No.:

13/922670

Inventors:

- Chicago IL, US
Tu Q. Le - Cerritos CA, US
Tae J. Roh - Los Angeles CA, US
Helen Liu - Los Angeles CA, US

International Classification:

H04L 12/70

US Classification:

370388

Abstract:

A method using a computer in conjunction with a non-transitory computer readable storage medium is provided comprising a computer receiving a message for forwarding at an ingress switch of a multi-stage circuit switching network. The method also comprises computer executing a first routing algorithm in transmitting the message, the algorithm comprising the computer determining at least one availability matrix for each middle switch, wherein a given middle switch comprises a switch between ingress and egress switches of the network. The method also comprises the computer assigning resources to a selected middle switch and updating the availability matrix and causing the ingress switch to transmit the message via the middle switch based on determining a first availability matrix for the middle switch using the algorithm wherein the algorithm is executed to forward messages on at least one of unicast, fan-in, and fan-out bases and minimize blocking and imbalance on middle switches.