Patents by Inventor Christopher M. Fetzer

Christopher M. Fetzer 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: 20160155644
    Abstract: Technologies for a process used to reduce the height of a raised profile of a device. One or more raised profiles on one or more layers of a device are removed using a combined chemical-mechanical polishing/etching process. In some implementations, a protective layer is applied to a top layer of a device grown on a substrate. A combined chemical-mechanical polishing/etching process may commence whereby one or more raised profiles of the protective layer are removed through a planarization process, exposing at least a portion of a raised profile of a layer below the protective layer. Material may be removed using an etchant to reduce the height of the raised profile.
    Type: Application
    Filed: December 1, 2014
    Publication date: June 2, 2016
    Inventors: Scott B. Singer, Joseph C. Boisvert, Daniel C. Law, Christopher M. Fetzer
  • Patent number: 9276156
    Abstract: A solar cell includes a first layer having a first-layer lattice parameter, a second layer having a second-layer lattice parameter different from the first-layer lattice parameter, wherein the second layer includes a photoactive second-layer material; and a third layer having a third-layer lattice parameter different from the second-layer lattice parameter, wherein the third layer includes a photoactive third-layer material. A transparent buffer layer extends between and contacts the second layer and the third layer and has a buffer-layer lattice parameter that varies with increasing distance from the second layer toward the third layer, so as to lattice match to the second layer and to the third layer. There may be additional subcell layers and buffer layers in the solar cell.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: March 1, 2016
    Assignee: The Boeing Company
    Inventors: Richard R. King, Christopher M. Fetzer, Peter C. Colter
  • Publication number: 20160013357
    Abstract: A solar cell including a base region, a back surface field layer and a delta doping layer positioned between the base region and the back surface field layer.
    Type: Application
    Filed: September 23, 2015
    Publication date: January 14, 2016
    Inventors: Xing-Quan Liu, Christopher M. Fetzer, Daniel C. Law
  • Publication number: 20160013350
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least a first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: July 23, 2015
    Publication date: January 14, 2016
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Publication number: 20150333208
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least a first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: July 23, 2015
    Publication date: November 19, 2015
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Patent number: 9178098
    Abstract: A solar cell including a base region, a back surface field layer and a delta doping layer positioned between the base region and the back surface field layer.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: November 3, 2015
    Assignee: The Boeing Company
    Inventors: Xing-Quan Liu, Christopher M. Fetzer, Daniel C. Law
  • Patent number: 9099595
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single-junction or multijunction solar cells, with at least a first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 4, 2015
    Assignee: The Boeing Company
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Publication number: 20150171254
    Abstract: Methods for improving the performance and lifetime of irradiated photovoltaic cells are disclosed, whereby Group-V elements, and preferably nitrogen, are used to dope semiconductor GaAs-based subcell alloys.
    Type: Application
    Filed: February 20, 2015
    Publication date: June 18, 2015
    Inventors: Joseph C. Boisvert, Christopher M. Fetzer
  • Publication number: 20150083037
    Abstract: A method of disordering a layer of an optoelectronic device including; growing a plurality of lower layers; introducing an isoelectronic surfactant; growing a layer; allowing the surfactant to desorb; and growing subsequent layers all performed at a low pressure of 25 torr.
    Type: Application
    Filed: September 29, 2014
    Publication date: March 26, 2015
    Inventors: Christopher M. Fetzer, James H. Ermer, Richard R. King, Peter C. Colter
  • Patent number: 8987129
    Abstract: Methods for improving the performance and lifetime of irradiated photovoltaic cells are disclosed, whereby Group-V elements, and preferably nitrogen, are used to dope semiconductor GaAs-based subcell alloys.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: March 24, 2015
    Assignee: The Boeing Company
    Inventors: Joseph C. Boisvert, Christopher M. Fetzer
  • Publication number: 20150059840
    Abstract: A solar cell includes a first layer having a first-layer lattice parameter, a second layer having a second-layer lattice parameter different from the first-layer lattice parameter, wherein the second layer includes a photoactive second-layer material; and a third layer having a third-layer lattice parameter different from the second-layer lattice parameter, wherein the third layer includes a photoactive third-layer material. A transparent buffer layer extends between and contacts the second layer and the third layer and has a buffer-layer lattice parameter that varies with increasing distance from the second layer toward the third layer, so as to lattice match to the second layer and to the third layer. There may be additional subcell layers and buffer layers in the solar cell.
    Type: Application
    Filed: August 19, 2014
    Publication date: March 5, 2015
    Inventors: Richard R. King, Christopher M. Fetzer, Peter C. Colter
  • Patent number: 8846134
    Abstract: A method of disordering a layer of an optoelectronic device including; growing a plurality of lower layers; introducing an isoelectronic surfactant; growing a layer; allowing the surfactant to desorb; and growing subsequent layers all performed at a low pressure of 25 torr.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: September 30, 2014
    Assignee: The Boeing Company
    Inventors: Christopher M. Fetzer, James H. Ermer, Richard R. King, Peter C. Colter
  • Publication number: 20140238872
    Abstract: Systems and methods for separating components of a multilayer stack of electronic components are disclosed herein. The multilayer stack may include an electronic assembly, a substrate, and a sacrificial anode portion that is located between the electronic assembly and the substrate and that operatively attaches the electronic assembly to the substrate. The methods may include locating the multilayer stack within an electrically conductive fluid to form an electrochemical cell and generating a potential difference between a cathode portion of the electronic assembly and the sacrificial anode portion. The methods further may include separating the electronic assembly from the substrate by electrochemically oxidizing the sacrificial anode portion to dissolve the sacrificial anode portion within the electrically conductive solution.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 28, 2014
    Applicant: The Boeing Company
    Inventors: Robyn L. Woo, Xiaobo Zhang, Christopher M. Fetzer, Eric M. Rehder
  • Patent number: 8748324
    Abstract: Systems and methods for separating components of a multilayer stack of electronic components. The multilayer stack includes an electronic assembly, a substrate, and a sacrificial anode portion that is located between the electronic assembly and the substrate and that operatively attaches the electronic assembly to the substrate. The systems and methods may include locating the multilayer stack within an electrically conductive fluid to form an electrochemical cell. The systems and methods further may include generating a potential difference between a cathode portion of the electronic assembly and the sacrificial anode portion such that the cathode portion forms a cathode of the electrochemical cell and the sacrificial anode portion forms an anode of the electrochemical cell.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: June 10, 2014
    Assignee: The Boeing Company
    Inventors: Robyn L. Woo, Xiaobo Zhang, Christopher M. Fetzer, Eric M. Rehder
  • Publication number: 20140084146
    Abstract: Methods for improving the performance and lifetime of irradiated photovoltaic cells are disclosed, whereby Group-V elements, and preferably nitrogen, are used to dope semiconductor GaAs-based subcell alloys.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 27, 2014
    Applicant: The Boeing Company
    Inventors: Joseph C. Boisvert, Christopher M. Fetzer
  • Publication number: 20140076387
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least a first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Publication number: 20140076386
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least one layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Publication number: 20140076391
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least a first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Publication number: 20140076388
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least a first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam
  • Publication number: 20140076389
    Abstract: Device structures, apparatuses, and methods are disclosed for photovoltaic cells that may be a single junction or multijunction solar cells, with at least as first layer comprising a group-IV semiconductor in which part of the cell comprises a second layer comprising a III-V semiconductor or group-IV semiconductor having a different composition than the group-IV semiconductor of the first layer, such that a heterostructure is formed between the first and second layers.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: THE BOEING COMPANY
    Inventors: Richard R. King, Christopher M. Fetzer, Nasser H. Karam