Patents by Inventor Marshall J. Cohen

Marshall J. Cohen 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).

  • Patent number: 6005266
    Abstract: A low leakage current monolithic InGaAs InP discrete device is provided for a focal plane array for near-infrared imaging. The array consists of a plurality of InGaAs p-i-n diodes for photodetectors, with each being integrated on a common substrate with an Inp junction field effect transistor (JFET) as a switching element for each pixel. In order to minimize the drain and gate leakage to achieve high-detection sensitivity, a p-encapsulation of an n-drained of each JFET is employed.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: December 21, 1999
    Assignee: The Trustees of Princeton University
    Inventors: Stephen Ross Forrest, Marshall J. Cohen, Michael J. Lange, Dong-Su Kim
  • Patent number: 4759803
    Abstract: A protected solar cell including a monolithic bypass diode is formed by adding an additional layer of semiconductive material having a type opposite to the outermost semiconductive layer of a solar cell, and the resultant additional layer is cut back to form a small area bypass diode, which is subsequently connected across the solar cell by integrated circuit metallization techniques. The solar cell may be formed of gallium arsenide with the underlying semiconductive material being n-type gallium arsenide, and forming a junction with a thin layer of p-type gallium arsenide covered with a window of p-type aluminum gallium arsenide. The bypass diode is initially formed of a supplemental layer of n-type gallium arsenide, and by sucessive etching processes, an island is formed extending downward from a small area of n-type gallium arsenide through the two p-type layers.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: July 26, 1988
    Assignee: Applied Solar Energy Corporation
    Inventor: Marshall J. Cohen
  • Patent number: 4427840
    Abstract: A photovoltaic cell structure is fabricated from an active medium including an undoped, intrinsically p-type organic semiconductor comprising polyacetylene. When a film of such material is in rectifying contact with a magnesium electrode, a Schottky-barrier junction is obtained within the body of the cell structure. Also, a gold overlayer passivates the magnesium layer on the undoped polyacetylene film.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: January 24, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: James R. Waldrop, Marshall J. Cohen
  • Patent number: 4227943
    Abstract: A solar cell is constructed by coating an n-type conductivity semiconductor with a thin layer of bromine doped, polymeric sulfur-nitride, (SNBr.sub.0.4).sub.x. Metal deposits are provided on both materials for making electrical contact to the cell. In a preferred embodiment, the semiconductor is silicon. In a second preferred embodiment, the semiconductor is GaAs on an n.sup.+ -type conductivity GaAs substrate.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: October 14, 1980
    Assignee: Rockwell International Corporation
    Inventors: Marshall J. Cohen, James S. Harris, Jr.
  • Patent number: 4016331
    Abstract: A composite polymeric material having metallic surface properties is prepared by subliming solid crystalline polymeric sulfur nitride to a vapor, and thereafter condensing the polymeric sulfur nitride vapor onto the surface of a highly-oriented thermoplastic polymeric substrate to thereby form on the substrate an epitaxial crystalline polymeric sulfur nitride film. The polymeric sulfur nitride film is completely oriented parallel to the direction of orientation of the substrate and has a relatively high degree of anisotropy with respect to its electrical conductivity and optical properties.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: April 5, 1977
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Anthony Frank Garito, Alan J. Heeger, Alan G. MacDiarmid, Arthur A. Bright, Marshall J. Cohen, Chester M. Mikulski