Patents by Inventor William Edwin McMAHON

William Edwin McMAHON 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).

  • Patterned nanochannel sacrificial layer for semiconductor substrate reuse
    Patent number: 11830733
    Abstract: Described herein are systems and methods of utilizing nanochannels generated in the sacrificial layer of a semiconductor substrate to increase epitaxial lift-off speeds and facilitate reusability of GaAs substrates. The provided systems and methods may utilize unique nanochannel geometries to increase the surface area exposed to the etchant and further decrease etch times.
    Type: Grant
    Filed: March 28, 2022
    Date of Patent: November 28, 2023
    Assignee: Alliance for Sustainable Energy, LLC
    Inventors: John Stanley Mangum, William Edwin Mcmahon, Emily Lowell Warren, San Theingi
  • PATTERNED NANOCHANNEL SACRIFICIAL LAYER FOR SEMICONDUCTOR SUBSTRATE REUSE
    Publication number: 20220310389
    Abstract: Described herein are systems and methods of utilizing nanochannels generated in the sacrificial layer of a semiconductor substrate to increase epitaxial lift-off speeds and facilitate reusability of GaAs substrates. The provided systems and methods may utilize unique nanochannel geometries to increase the surface area exposed to the etchant and further decrease etch times.
    Type: Application
    Filed: March 28, 2022
    Publication date: September 29, 2022
    Inventors: John Stanley MANGUM, William Edwin MCMAHON, Emily Lowell WARREN, San THEINGI
  • Methods of exfoliating single crystal materials
    Patent number: 11302531
    Abstract: Disclosed herein are methods for exfoliation of single crystals allowing for growth of high crystalline quality on the exfoliated surfaces for III-V photovoltaics. Also disclosed herein are methods for growing GaAs (111) on layered-2D Bi2Se3 (0001) substrates in an MOCVD reactor.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: April 12, 2022
    Assignees: Alliance for Sustainable Energy, LLC, Colorado School of Mines
    Inventors: Andrew Gordon Norman, Celeste Louise Melamed, Eric Steven Toberer, William Edwin McMahon
  • METHODS OF EXFOLIATING SINGLE CRYSTAL MATERIALS
    Publication number: 20200395213
    Abstract: Disclosed herein are methods for exfoliation of single crystals allowing for growth of high crystalline quality on the exfoliated surfaces for III-V photovoltaics. Also disclosed herein are methods for growing GaAs (111) on layered-2D Bi2Se3 (0001) substrates in an MOCVD reactor.
    Type: Application
    Filed: August 26, 2020
    Publication date: December 17, 2020
    Inventors: Andrew Gordon NORMAN, Celeste Louise MELAMED, Eric Steven TOBERER, William Edwin MCMAHON
  • ENABLING LOW-COST III-V/SI INTEGRATION THROUGH NUCLEATION OF GAP ON V-GROOVED SI SUBSTRATES
    Publication number: 20190378952
    Abstract: Disclosed herein are materials and methods useful for growth of III-V materials on Si that result in the reduction of costs for manufacturing III-V PV.
    Type: Application
    Filed: June 10, 2019
    Publication date: December 12, 2019
    Inventors: Emily Lowell Warren, William Edwin McMahon, Adele Clare Tamboli, Emily Anne Makoutz, Jeramy David Zimmerman
  • METHODS OF EXFOLIATING SINGLE CRYSTAL MATERIALS
    Publication number: 20180366325
    Abstract: Disclosed herein are methods for exfoliation of single crystals allowing for growth of high crystalline quality on the exfoliated surfaces for III-V photovoltaics.
    Type: Application
    Filed: June 14, 2018
    Publication date: December 20, 2018
    Inventors: Andrew Gordon Norman, Celeste Louise Melamed, Eric Steven Toberer, William Edwin McMahon
  • Interconnections for Mechanically Stacked Multijunction Solar Cells
    Publication number: 20130048064
    Abstract: Mechanically stacked multijunction solar cells are provided. In one embodiment, a mechanically stacked, multijunction solar cell comprises: a first solar cell having a first bandgap; a second solar cell having a second bandgap; and a plurality of spaced apart metal pillars sandwiched between the first solar cell and the second solar cell.
    Type: Application
    Filed: August 28, 2012
    Publication date: February 28, 2013
    Applicant: ALLIANCE FOR SUSTAINABLE ENERGY, LLC
    Inventors: William Edwin McMAHON, James Scott WARD, Chieh-Ting LIN, Mark W. WANLASS