Patents by Inventor Sheyu Guo

Sheyu Guo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20100320456
    Abstract: The present invention is directed to methods for depositing doped and/or alloyed semiconductor layers, an apparatus suitable for the depositing, and products prepared therefrom.
    Type: Application
    Filed: June 19, 2009
    Publication date: December 23, 2010
    Applicant: EPV Solar, Inc.
    Inventors: Alan E. DELAHOY, Gaurav SARAF, Sheyu GUO
  • Publication number: 20080308411
    Abstract: A method for sputtering a textured zinc oxide coating onto a substrate by reactive-environment hollow cathode sputtering comprises providing a sputter reactor that has a cathode channel and a flow exit end. The cathode channel allows a gas stream to flow therein. This cathode channel is at least partially defined by a channel-defining surface that includes at least one zinc-containing target. A gas is flowed through the channel, such that the gas emerges from the flow exit. A plasma is then generated such that material is sputtered off the channel-defining surface to form a gaseous mixture containing zinc atoms that is transported to the substrate. A reactive gas is then introduced into the sputter reactor so that the reactive gas reacts with the zinc-containing gaseous mixture to form the textured zinc oxide coating.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 18, 2008
    Applicant: ENERGY PHOTOVOLTAICS, INC.
    Inventors: Sheyu Guo, Alan E. Delahoy
  • Publication number: 20070256926
    Abstract: The present invention provides an improved hollow cathode method for sputter coating a substrate. The method of the invention comprises providing a channel for gas to flow through, the channel defined by a channel defining surface wherein one or more portions of the channel-defining surface include at least one target material. Gas is flowed through the channel wherein at least a portion of the gas is a non-laminarly flowing gas. While the gas is flowing through the channel a plasma is generated causing target material to be sputtered off the channel-defining surface to form a gaseous mixture containing target atoms that is transported to the substrate. In an important application of the present invention, a method for forming oxide films and in particular zinc oxide films is provided.
    Type: Application
    Filed: June 26, 2007
    Publication date: November 8, 2007
    Applicant: ENERGY PHOTOVOLTAICS, INC.
    Inventors: Alan Delahoy, Sheyu Guo
  • Patent number: 7235160
    Abstract: The present invention provides an improved hollow cathode method for sputter coating a substrate. The method of the invention comprises providing a channel for gas to flow through, the channel defined by a channel defining surface wherein one or more portions of the channel-defining surface include at least one target material. Gas is flowed through the channel wherein at least a portion of the gas is a non-laminarly flowing gas. While the gas is flowing through the channel a plasma is generated causing target material to be sputtered off the channel-defining surface to form a gaseous mixture containing target atoms that is transported to the substrate. In an important application of the present invention, a method for forming oxide films and in particular zinc oxide films is provided.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: June 26, 2007
    Assignee: Energy Photovoltaics, Inc.
    Inventors: Alan E. Delahoy, Sheyu Guo
  • Publication number: 20060118406
    Abstract: A hollow cathode sputtering apparatus and related method for introducing dopants into a sputtered coating is provided. The method utilizes a sputter reactor which includes a cathode channel that allows a gas stream to flow therein and a flow exit end from which gases may flow out of and towards a substrate to be coated. The cathode channel as used in the invention is defined by a channel defining surface that includes at least one target material. The sputter reactor further includes a dopant target positioned to provide dopant atoms to the gas stream when the gas stream is flowed through the cathode channel.
    Type: Application
    Filed: December 8, 2005
    Publication date: June 8, 2006
    Inventors: Alan Delahoy, Sheyu Guo, Robert Lyndall, J.A. Selvan
  • Publication number: 20050029088
    Abstract: The present invention provides an improved hollow cathode method for sputter coating a substrate. The method of the invention comprises providing a channel for gas to flow through, the channel defined by a channel defining surface wherein one or more portions of the channel-defining surface include at least one target material. Gas is flowed through the channel wherein at least a portion of the gas is a non-laminarly flowing gas. While the gas is flowing through the channel a plasma is generated causing target material to be sputtered off the channel-defining surface to form a gaseous mixture containing target atoms that is transported to the substrate. In an important application of the present invention, a method for forming oxide films and in particular zinc oxide films is provided.
    Type: Application
    Filed: August 6, 2003
    Publication date: February 10, 2005
    Applicant: Energy Photovoltaics, Inc.
    Inventors: Alan Delahoy, Sheyu Guo