Patents by Inventor Francisco C. Prince

Francisco C. Prince 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 treating bodies of III-V compound semiconductor material
    Patent number: 4820651
    Abstract: A method of rapid thermal annealing a wafer of an ion implanted III-V compound semiconductor material by heating the wafer in close proximity to a III-V compound semiconductor wafer coated with a layer of tin or indium. A localized overpressure of the Group V element is produced by the combination of the III and V elements with the tin or indium tending to reduce surface decomposition of the implanted wafer.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: April 11, 1989
    Assignee: GTE Laboratories Incorporated
    Inventors: Francisco C. Prince, Craig A. Armiento
  • Method of diffusing conductivity type imparting material into III-V compound semiconductor material
    Patent number: 4725565
    Abstract: Method of diffusing sulfur into gallium arsenide without degrading the surface of the gallium arsenide. A gallium arsenide wafer is placed in close proximity to a quantity of powdered gallium sulfide intermixed with powdered gallium arsenide. The assemblage is heated in an open-tube furnace in the presence of flowing nitrogen to vaporize sulfur while the gallium arsenide and gallium sulfide are in thermodynamic equilibrium whereby sulfur diffuses into the gallium arsenide wafer without eroding the surface.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: February 16, 1988
    Assignee: GTE Laboratories Incorporated
    Inventors: Moshe Oren, Francisco C. Prince