Patents by Inventor Sam Kao

Sam Kao 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: 20170167028
    Abstract: Methods and systems are disclosed for processing a precursor material. The method includes introducing a substrate having a precursor material deposited on a surface of the substrate into a first zone of a vacuum chamber. The precursor material comprises copper, indium, and at least one of gallium, selenium, sulfur, sodium, antimony, boron, aluminum, and silver. The method further includes, within the first zone, heating the precursor material to a target reaction temperature within a range of about 270° C. to about 490° C. The method further includes maintaining a selenium vapor in a second zone of the vacuum chamber, and after heating the precursor material to the target reaction temperature, introducing the precursor material and the substrate to the second zone of the vacuum chamber.
    Type: Application
    Filed: June 8, 2015
    Publication date: June 15, 2017
    Inventors: Arthur C. WALL, John Kwangyong KIM, Eugene BYKOV, Sam KAO, Qiongzhong JIANG, Bruce D. HACHTMANN
  • Publication number: 20160273097
    Abstract: Methods and systems are disclosed for monitoring vapor in a vacuum reactor apparatus. An system has (a) a vacuum chamber, (b) a vapor source housed in the vacuum chamber, wherein the vapor source is configured to generate a vapor, (c) a reaction vessel housed in the vacuum chamber and coupled to the vapor source, where the reaction vessel has an outlet to the vacuum chamber, and where the reaction vessel is configured to receive the vapor from the vapor source and to emit a portion of the received vapor into the vacuum chamber through the outlet, and (d) one or more sensors housed in the vacuum chamber, where the one or more sensors are configured to detect the vapor emitted through the outlet.
    Type: Application
    Filed: October 16, 2014
    Publication date: September 22, 2016
    Applicant: NUVOSUN, INC.
    Inventors: Arthur C. WALL, Sam KAO, John Kwangyong KIM, Bruce D. HACHTMANN, Qiongzhong JIANG, Karnig Ross Baron PORTER
  • Patent number: 8603575
    Abstract: A thin-film absorber formation method includes: operating a furnace having an internal atmosphere containing a process gas; loading process gas material into a source container that is part of a system configured to provide process gas to the furnace, wherein loading of the source container occurs without exposing the internal atmosphere of the furnace to external atmosphere present in the source container by solidifying process gas material to form a gas tight seal to separate the source container from the furnace, wherein the seal is formed before the source container is opened for loading and external atmosphere enters the source container, including a pathway configured to retain process gas material in a section of the pathway to solidify and create the seal.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: December 10, 2013
    Assignee: Nanosolar, Inc.
    Inventor: Sam Kao
  • Patent number: 8525152
    Abstract: Methods and devices are provided for absorber layers formed on foil substrate. In one embodiment, a method of manufacturing photovoltaic devices may be comprised of providing a substrate comprising of at least one electrically conductive aluminum foil substrate, at least one electrically conductive diffusion barrier layer, and at least one electrically conductive electrode layer above the diffusion barrier layer. The diffusion barrier layer may prevent chemical interaction between the aluminum foil substrate and the electrode layer. An absorber layer may be formed on the substrate. In one embodiment, the absorber layer may be a non-silicon absorber layer. In another embodiment, the absorber layer may be an amorphous silicon (doped or undoped) absorber layer. Optionally, the absorber layer may be based on organic and/or inorganic materials.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: September 3, 2013
    Assignee: Nanosolar, Inc.
    Inventors: Craig Leidholm, Brent Bollman, James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Patent number: 8309949
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: November 13, 2012
    Assignee: Nanosolar, Inc.
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20120237816
    Abstract: A bipolar battery may include a substrate having a matrix made of a thermoset polymer formed from a liquid precursor. One or more conductive pellets can be disposed in the matrix to provide electrical connection between opposite sides of the matrix. Each conductive pellet has a characteristic thickness that is greater than a thickness of the matrix. Each of the one or more conductive pellets protrudes beyond first and second surfaces of the matrix.
    Type: Application
    Filed: March 15, 2011
    Publication date: September 20, 2012
    Applicant: YottaQ, Inc.
    Inventors: Martin R. Roscheisen, Brent J. Bollman, Hak Fei Poon, Zhengyu Wu, Boris Monahov, Sam Kao
  • Patent number: 8198117
    Abstract: Methods and devices are provided for absorber layers formed on foil substrate. In one embodiment, a method of manufacturing photovoltaic devices may be comprised of providing a substrate comprising of at least one electrically conductive aluminum foil substrate, at least one electrically conductive diffusion barrier layer, and at least one electrically conductive electrode layer above the diffusion barrier layer. The diffusion barrier layer may prevent chemical interaction between the aluminum foil substrate and the electrode layer. An absorber layer may be formed on the substrate. In one embodiment, the absorber layer may be a non-silicon absorber layer. In another embodiment, the absorber layer may be an amorphous silicon (doped or undoped) absorber layer. Optionally, the absorber layer may be based on organic and/or inorganic materials.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: June 12, 2012
    Assignee: Nanosolar, Inc.
    Inventors: Craig R. Leidholm, Brent Bollman, James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20120052613
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Application
    Filed: June 27, 2011
    Publication date: March 1, 2012
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Patent number: 7968869
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Grant
    Filed: October 4, 2008
    Date of Patent: June 28, 2011
    Assignee: Nanosolar, Inc.
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20110121353
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 26, 2011
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Patent number: 7919337
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 5, 2011
    Assignee: Nanosolar, Inc.
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Patent number: 7838868
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: November 23, 2010
    Assignee: Nanosolar, Inc.
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20100243049
    Abstract: Methods and devices are provided for absorber layers formed on foil substrate. In one embodiment, a method of manufacturing photovoltaic devices may be comprised of providing a substrate comprising of at least one electrically conductive aluminum foil substrate, at least one electrically conductive diffusion barrier layer, and at least one electrically conductive electrode layer above the diffusion barrier layer. The diffusion barrier layer may prevent chemical interaction between the aluminum foil substrate and the electrode layer. An absorber layer may be formed on the substrate. In one embodiment, the absorber layer may be a non-silicon absorber layer. In another embodiment, the absorber layer may be an amorphous silicon (doped or undoped) absorber layer. Optionally, the absorber layer may be based on organic and/or inorganic materials.
    Type: Application
    Filed: June 7, 2010
    Publication date: September 30, 2010
    Inventors: Craig Leidholm, Brent Bollman, James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Patent number: 7732232
    Abstract: Series interconnection of optoelectronic device modules is disclosed. Each device module includes an active layer disposed between a bottom electrode and a transparent conducting layer. An insulating layer is disposed between the bottom electrode of a first device module and a backside top electrode of the first device module. One or more vias are formed through the active layer, transparent conducting layer and insulating layer of the first device module. Sidewalls of the vias are coated with an insulating material such that a channel is formed through the insulating material to the backside top electrode of the first device module. The channel is at least partially filled with an electrically conductive material to form a plug that makes electrical contact between the transparent conducting layer and the backside top electrode of the first device module.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: June 8, 2010
    Assignee: Nanosolar, Inc.
    Inventors: James R. Sheats, Sam Kao, Gregory A. Miller, Martin R. Roscheisen
  • Patent number: 7732229
    Abstract: Methods and devices are provided for absorber layers formed on foil substrate. In one embodiment, a method of manufacturing photovoltaic devices may be comprised of providing a substrate comprising of at least one electrically conductive aluminum foil substrate, at least one electrically conductive diffusion barrier layer, and at least one electrically conductive electrode layer above the diffusion barrier layer. The diffusion barrier layer may prevent chemical interaction between the aluminum foil substrate and the electrode layer. An absorber layer may be formed on the substrate. In one embodiment, the absorber layer may be a non-silicon absorber layer. In another embodiment, the absorber layer may be an amorphous silicon (doped or undoped) absorber layer. Optionally, the absorber layer may be based on organic and/or inorganic materials.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: June 8, 2010
    Assignee: Nanosolar, Inc.
    Inventors: Craig Leidholm, Brent Bollman, James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20090178706
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Application
    Filed: October 4, 2008
    Publication date: July 16, 2009
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Patent number: 7521360
    Abstract: A through hole (114) is formed in a wafer (104) comprising a semiconductor substrate (110). A seed layer (610) is sputtered on the bottom surface of the wafer. The seed is not deposited over the through hole's sidewalls adjacent the top surface of the wafer. A conductor (810) is electroplated into the through hole. In another embodiment, a seed is deposited into an opening in a wafer through a dry film resist mask (1110). The dry film resist overhangs the edges of the opening, so the seed is not deposited over the opening's sidewalls adjacent the top surface of the wafer. In another embodiment, a dielectric (120) is formed in an opening in a semiconductor substrate (110) by a non-conformal physical vapor deposition (PVD) process that deposits the dielectric on the sidewalls but not the bottom of the opening. A seed (610) is formed on the bottom by electroless plating. A conductor (810) is electroplated on the seed.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: April 21, 2009
    Assignee: Tru-Si Technologies, Inc.
    Inventors: Patrick A. Halahan, Sam Kao, Bosco Lan, Sergey Savastiouk, Oleg Siniaguine
  • Publication number: 20080308148
    Abstract: Methods and devices are provided for absorber layers formed on foil substrate. In one embodiment, a method of manufacturing photovoltaic devices may be comprised of providing a substrate comprising of at least one electrically conductive aluminum foil substrate, at least one electrically conductive diffusion barrier layer, and at least one electrically conductive electrode layer above the diffusion barrier layer. The diffusion barrier layer may prevent chemical interaction between the aluminum foil substrate and the electrode layer. An absorber layer may be formed on the substrate. In one embodiment, the absorber layer may be a non-silicon absorber layer. In another embodiment, the absorber layer may be an amorphous silicon (doped or undoped) absorber layer. Optionally, the absorber layer may be based on organic and/or inorganic materials.
    Type: Application
    Filed: August 16, 2006
    Publication date: December 18, 2008
    Inventors: Craig R. Leidholm, Brent Bollman, James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20080142073
    Abstract: Optoelectronic device modules, arrays optoelectronic device modules and methods for fabricating optoelectronic device modules are disclosed. The device modules are made using a starting substrate having an insulator layer sandwiched between a bottom electrode made of a flexible bulk conductor and a conductive back plane. An active layer is disposed between the bottom electrode and a transparent conducting layer. One or more electrical contacts between the transparent conducting layer and the back plane are formed through the transparent conducting layer, the active layer, the flexible bulk conductor and the insulating layer. The electrical contacts are electrically isolated from the active layer, the bottom electrode and the insulating layer.
    Type: Application
    Filed: October 31, 2007
    Publication date: June 19, 2008
    Inventors: James R. Sheats, Sam Kao, Martin R. Roscheisen
  • Publication number: 20080020503
    Abstract: Series interconnection of optoelectronic device modules is disclosed. Each device module includes an active layer disposed between a bottom electrode and a transparent conducting layer. An insulating layer is disposed between the bottom electrode of a first device module and a backside top electrode of the first device module. One or more vias are formed through the active layer, transparent conducting layer and insulating layer of the first device module. Sidewalls of the vias are coated with an insulating material such that a channel is formed through the insulating material to the backside top electrode of the first device module. The channel is at least partially filled with an electrically conductive material to form a plug that makes electrical contact between the transparent conducting layer and the backside top electrode of the first device module.
    Type: Application
    Filed: October 1, 2007
    Publication date: January 24, 2008
    Inventors: James Sheats, Sam Kao, Gregory Miller, Martin Roscheisen