Patents by Inventor Hafeezuddin Mohammed

Hafeezuddin Mohammed 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).

  • Solar cells and methods of fabrication thereof
    Patent number: 9960287
    Abstract: A passivation layer is deposited on a first portion of a region of the solar cell. A grid line is deposited on a second portion of the region. The passivation layer is annealed to drive chemical species from the passivation layer to deactivate an electrical activity of a dopant in the first portion of the region of the solar cell.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: May 1, 2018
    Assignee: PICASOLAR, INC.
    Inventors: Seth Daniel Shumate, Douglas Arthur Hutchings, Hafeezuddin Mohammed, Matthew Young, Scott Little
  • SOLAR CELLS AND METHODS OF FABRICATION THEREOF
    Publication number: 20150228810
    Abstract: A passivation layer is deposited on a first portion of a region of the solar cell. A grid line is deposited on a second portion of the region. The passivation layer is annealed to drive chemical species from the passivation layer to deactivate an electrical activity of a dopant in the first portion of the region of the solar cell.
    Type: Application
    Filed: February 11, 2014
    Publication date: August 13, 2015
    Inventors: Seth Daniel Shumate, Douglas Arthur Hutchings, Hafeezuddin Mohammed, Matthew Young, Scott Little
  • CRYSTALLIZATION OF MULTI-LAYERED AMORPHOUS FILMS
    Publication number: 20130200386
    Abstract: In one aspect, crystallization of multiple layers of amorphous materials is disclosed. In one embodiment, multiple layers of amorphous materials such as amorphous silicon, silicon carbide, and/or germanium are deposited using deposition methods such as PECVD or sputtering. A layer of metal such as aluminum is deposited on the surface of the deposited amorphous materials using sputtering or evaporation, and the structure is annealed in a hydrogen environment. The structure is contained on a semiconductor substrate, glass, a flexible metal/organic film, or other type of substrate.
    Type: Application
    Filed: June 8, 2011
    Publication date: August 8, 2013
    Applicants: SILICON SOLAR SOLUTIONS, LLC, BOARD OF TRUSTEES OF THE UNIVERSITY OF ARKANSAS
    Inventors: Douglas Arthur Hutchings, Seth Daniel Shumate, Hameed Naseem, Khalil Hashim Sharif, Hafeezuddin Mohammed