Patents by Inventor Gary D Stevens

Gary D Stevens 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).

  • Method of fabricating an optical concentrator for a photovoltaic solar cell
    Patent number: 7312097
    Abstract: A method of fabricating a photovoltaic solar cell is provided. A plurality of generally spherical semiconductor elements are provided. Each of the semiconductor elements has a core and an outer surface surface forming a p-n junction. An anti-reflection coating is deposited on the outer surface of each of the semiconductor elements and each of the semiconductor elements is bonded into a perforated aluminum foil array thereby providing ohmic contact to a first side of the p-n junction. The anti-reflection coating is removed from a portion of each of the semiconductor elements and then the core is exposed, thereby allowing ohmic contact to be made to a second side of the p-n junction.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: December 25, 2007
    Assignee: Spheral Solar Power, Inc.
    Inventors: Milfred D Hammerbacher, Gary D Stevens, Paul R Sharrock, Aline Wullur, Frederic Rivollier