Patents by Inventor Ramond Jeffrey Vass

Ramond Jeffrey Vass 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).

  • Voltage variable resistor from HBT epitaxial layers
    Patent number: 6384433
    Abstract: A voltage variable resistor formed on heterojunction bipolar transistor epitaxial material includes a current channel made on emitter material. Emitter mesas separated by a recess provide the contacts for the voltage variable resistor. Each mesa is topped with emitter metal forming the resistor contacts. The emitter mesas are layered on top of the current channel that is layered atop of a base layer. The voltage variable resistor's control contact is provided by a base contact located on the base layer and separated from the current channel.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: May 7, 2002
    Assignee: RF Micro Devices, Inc.
    Inventors: Curtis A. Barratt, Arthur E. Geissberger, Larry W. Kapitan, Michael T. Fresina, Ramond Jeffrey Vass