Yonghua Liu from 7526 Perry Dr, Frisco, TX 75035, age 54

Us Patents

Low-Temperature Method For Forming Amorphous Semiconductor Layers
view source
US Patent:

20120258561, Oct 11, 2012
Filed:

Apr 11, 2011
Appl. No.:

13/083625
Inventors:

Jian Li - Fremont CA, US
Venkatesan Murali - San Jose CA, US
Yonghua Liu - Irving TX, US
Dong Xu - San Jose CA, US
Assignee:

TWIN CREEKS TECHNOLOGIES, INC. - San Jose CA
International Classification:

H01L 31/02
H01L 31/0368
H01L 31/0376
US Classification:

438 64, 438 96, 438 97, 257E31047, 257E31043, 257E3111
Abstract:

In embodiments of the present invention an undoped amorphous, nanocrystalline or microcrystalline semiconductor layer and a heavily doped amorphous, nanocrystalline, or microcrystalline semiconductor layer are formed on a monocrystalline silicon lamina. The lamina is the base region of a photovoltaic cell, while the amorphous, nanocrystalline or monocrystalline layers serve to passivate the surface of the lamina, reducing recombination at this surface. In embodiments, the heavily doped layer additionally serves as either the emitter of the cell or to provide electrical contact to the base layer. The undoped and heavily doped layers are deposited at low temperature, for example about 150 degrees C. or less with hydrogen dilution. This low temperature allows use of low-temperature materials and methods, while increased hydrogen dilution improves film quality and/or conductivity.

Resumes

Director, Front-End And Materials Science At Micropac Industries

view source

Location:

Frisco, TX

Industry:

Electrical/Electronic Manufacturing

Work:

Micropac Industries Inc
Director, Front-End and Materials Science at Micropac Industries
Murata Electronics Jan 2012 - Nov 2014
Foundry Engineering Technologist
Entech Solar Apr 2011 - Dec 2011
Senior Process Engineer
Twin Creeks Technologies, Inc Jul 2010 - Apr 2011
Senior Process Engineer
Argus Power Technology Mar 2009 - May 2010
Engineering Manager

Education:

The University of Texas at Dallas 2001 - 2006
Doctorates, Doctor of Philosophy, Electrical Engineering Iowa State University 1999 - 2001
Master of Science, Masters, Materials Science, Engineering

Skills:

Project Management
Project Coordination
Contract Manufacturing
Offshore Outsourcing
Offshore Operations
Six Sigma
Lean Manufacturing
Spc
Supplier Sourcing
Supplier Quality
Process Engineering
Product Development
Semiconductor Fabrication
Solar Cells