Patents by Inventor Ronald C. Pennell

Ronald C. Pennell 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).

  • Wafer etch protection method
    Patent number: 5387316
    Abstract: A method of etching a semiconductor wafer includes providing a wafer having a portion thereof to be etched. A highly doped region is formed in the periphery of the wafer which is subsequently etched. The highly doped region of the wafer is substantially etch resistant to an etchant relative to the portion of the wafer being etched.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: February 7, 1995
    Assignee: Motorola, Inc.
    Inventors: Ronald C. Pennell, Ira E. Baskett, Lynn W. Ford
  • High voltage thin film transistor on PLZT and method of manufacture thereof
    Patent number: 4751196
    Abstract: A high voltage thin film transistor structure and method are disclosed which make it possible to fabricate matrix displays with integrated pixel switches on PLZT substrates. A polysilicon transistor capable of withstanding more than 60 V across the source and drain and with a ratio of on to off current in excess of 10.sup.3 is disclosed. The fabrication method disclosed is suitable for use with brittle and readily oxidizable PLZT substrates.
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: June 14, 1988
    Assignee: Motorola Inc.
    Inventors: Ronald C. Pennell, Richard D. Catero, Stephen L. Lovelis