Patents by Inventor Freeman D. Shepherd

Freeman D. Shepherd 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).

  • Schottky barrier infrared detector array with increased effective fill factor
    Patent number: 5796155
    Abstract: An improvement of the design of Schottky barrier infrared detector (SBIR) arrays, as taught by Roosild, et al. We describe modifications of the detector unit cell design which maximize the fraction of detector electrode area exhibiting full spectral emission response. In particular we recommend changes in the impurity density profile, or "doping", under the Schottky electrode. The new detector cell design can result in a two-fold increase in the photoemission of SBIR arrays, which have small detector cell dimensions.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: August 18, 1998
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Freeman D. Shepherd, Jonathan M. Mooney