Patents by Inventor Wondwosen Tilahun METAFERIA

Wondwosen Tilahun METAFERIA 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).

  • CONTROL OF SURFACE MORPHOLOGY DURING THE GROWTH OF (110)-ORIENTED GAAS BY HYDRIDE VAPOR PHASE EPITAXY
    Publication number: 20240274746
    Abstract: Disclosed herein are methods for the growth of (110) GaAs solar cells by hydride vapor phase epitaxy (HVPE) as an advance towards a (110)-oriented device platform with substrate reuse via spalling. Controlled spalling offers a fracture-based path to substrate amortization, allowing device removal and substrate reuse, but the faceted surface generated in spalling of (100)-GaAs presents hurdles to direct regrowth of subsequent devices. Spalling of (110)-oriented substrates takes advantage of the natural (110) cleavage plane in zinc-blende III-V materials, eliminating this faceting.
    Type: Application
    Filed: June 6, 2022
    Publication date: August 15, 2024
    Inventors: Kevin Louis SCHULTE, Wondwosen Tilahun METAFERIA, Aaron Joseph PTAK, John David SIMON
  • GROWTH OF SEMICONDUCTOR MATERIALS BY HYDRIDE VAPOR PHASE EPITAXY USING AN EXTERNAL ALUMINUM CHLORIDE GENERATOR
    Publication number: 20230062711
    Abstract: Disclosed herein is the controlled epitaxy of AlxGa1-xAs, AlxIn1-xP, and AlxGayIn1-x-yP by hydride vapor phase epitaxy (HVPE) through use of an external AlCl3 generator.
    Type: Application
    Filed: October 1, 2020
    Publication date: March 2, 2023
    Inventors: Wondwosen Tilahun METAFERIA, Kevin Louis SCHULTE, Aaron Joseph PTAK, John David SIMON
  • NITROGEN-ENABLED HIGH GROWTH RATES IN HYDRIDE VAPOR PHASE EPITAXY
    Publication number: 20200407873
    Abstract: Disclosed herein are methods and devices that use a low-thermal conductivity inert gas to shield reactant gases and thus enabling a cold wall operation within a hot wall system.
    Type: Application
    Filed: June 13, 2020
    Publication date: December 31, 2020
    Inventors: Elisabeth Lynne MCCLURE, Kevin Louis SCHULTE, Aaron Joseph PTAK, John David SIMON, Wondwosen Tilahun METAFERIA