Patents by Inventor Keith R. Evans

Keith R. Evans 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).

  • GROUP III NITRIDE TEMPLATES AND RELATED HETEROSTRUCTURES, DEVICES, AND METHODS FOR MAKING THEM
    Publication number: 20120235161
    Abstract: A templated substrate includes a base layer, and a template layer is disposed on the base layer and having a composition including a single-crystal Group III nitride. The template layer includes a continuous sublayer on the base layer and a nanocolumnar sublayer on the first sublayer, wherein the nanocolumnar sublayer includes a plurality of nano-scale columns.
    Type: Application
    Filed: May 31, 2012
    Publication date: September 20, 2012
    Inventors: Tanya Paskova, Edward A. Preble, Terry I. Clites, Andrew D. Hanser, Keith R. Evans
  • GROUP III NITRIDE TEMPLATES AND RELATED HETEROSTRUCTURES, DEVICES, AND METHODS FOR MAKING THEM
    Publication number: 20110127544
    Abstract: A templated substate includes a base layer, and a template layer disposed on the base layer and having a composition including a single-crystal Group Ill nitride. The template layer includes a continuous sublayer on the base layer and a nanocolumnar sublayer on the first sublayer, wherein the nanocolumnar sublayer includes a plurality of nano-scale columns.
    Type: Application
    Filed: May 6, 2009
    Publication date: June 2, 2011
    Applicant: KYMA TECHNOLOGIES
    Inventors: Tanya Paskova, Edward A. Preble, Terry L. Clites, Andrew D. Hanser, Keith R. Evans
  • Desorption mass spectrometric control of alloy composition during molecular beam epitaxy
    Patent number: 5543170
    Abstract: System and method for controlling alloy composition during molecular beam epitaxy growth of group III-V ternaries at high substrate temperature or under any conditions which give rise to significant desorption rates is described which incorporates desorption mass spectrometry in a real time feedback loop for continuous monitoring and control of layer composition by control of incident group V (e.g., arsenic) flux.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: August 6, 1996
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Keith R. Evans