Patents by Inventor Sustana Sen

Sustana Sen 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).

  • Resonant tunneling transistor
    Patent number: 4849799
    Abstract: A resonant-tunneling, heterostructure bipolar transistor having a quantum well between emitter contact and collector region is described. In one embodiment, a compositionally graded portion of the emitter region is adjacent to the base region, and there is a double barrier in the base region. In another embodiment the quantum well is defined by the emitter and a potential barrier in the base region. Further embodiments have a quantum well between emitter and collector regions or else within the emitter region.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: July 18, 1989
    Assignee: American Telephone and Telegraph Company AT&T Bell Laboratories
    Inventors: Federico Capasso, Harry T. French, Arthur C. Gossard, Albert L. Hutchinson, Richard A. Kiehl, Sustana Sen