Patents by Inventor Philippe Boy

Philippe Boy 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).

  • Quantum well detector and process for the manufacture thereof
    Patent number: 5677544
    Abstract: Quantum well detector, in which the active detection zone (2) occupies only a limited area of the device and in which a diffraction grid (5) having a larger surface area than this zone thereby makes it possible to couple to it a greater light flow than that corresponding to the surface area of this zone. In this way, the sensitivity of the device is increased.Application: Detection of optical radiation.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: October 14, 1997
    Assignee: Thomson-CSF
    Inventors: Jean-Yves Duboz, Fran.cedilla.ois Luc, Philippe Bois
  • Electromagnetic wave detector with quantum well structure
    Patent number: 5506418
    Abstract: An electromagnetic wave detector formed of semiconductor materials includes at least one quantum well in which there is provided a fine layer of a material with a gap width that is smaller than that of the quantum well layer. For example, in the case of a GaAlAs/GaAs/GaAlAs, there is provision for a fine layer of InAs. In this way, the difference of energy levels between the two permitted levels is increased and detection of short wavelengths may be accomplished.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: April 9, 1996
    Assignee: Thomson-CSF
    Inventors: Philippe Bois, Emmanuel Rosencher, Borge Vinter, Jean Massies, Gerard Neu, Nicolas Grandjean
  • Electromagnetic wave detector
    Patent number: 5326984
    Abstract: An electromagnetic wave detector comprises a stack of quantum wells included between an ohmic contact and a rectifier junction which may be a barrier (Al.sub.y Ga.sub.1-y As) with a forbidden band width that is greater than that of the barriers of the quantum wells.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: July 5, 1994
    Assignee: Thomson-CSF
    Inventors: Emmanuel Rosencher, Philippe Bois
  • Quantum-well electronic bolometer and application to a radiation detector
    Patent number: 5228777
    Abstract: An electronic bolometer comprises at least a quantum well between two barrier layers. It has an input side parallel to the quantum-well layer and receiving a beam at a quasi-normal incidence angle. Two electrodes disposed perpendicularly to the quantum-well layers allow to measure a change in the resistivity of said quantum well.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: July 20, 1993
    Assignee: Thomson-CSF
    Inventors: Emmanuel Rosencher, Philippe Bois
  • Quantum well optical device
    Patent number: 5187715
    Abstract: A quantum well optical device including a layer of semiconducting material of large forbidden band width and, situated in this layer, at least one quantum well, such as a quantum line or quantum hole, of a material having a narrower forbidden band than that of the layer. This quantum well has two permitted electron levels. Means exist of assuring the electron population of the first permitted energy level.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: February 16, 1993
    Assignee: Thomson-CSF
    Inventors: Claude Weisbuch, Philippe Bois, Borge Vinter