Patents by Inventor Barry P. O'Brien

Barry P. O'Brien 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).

  • Field emission device having an improved ballast resistor
    Patent number: 6424083
    Abstract: A field emission device (100) includes a cathode (110) and a ballast resistor (112) connected to cathode (110). Ballast resistor (112) includes a thin metallic layer (113) and a protective layer (114) disposed on metallic layer (113). Metallic layer (113) is made from chromium and has a thickness of about 40 angstroms. Protective layer (114) is made from sputtered silicon and has a thickness of about 500 angstroms. A portion of metallic layer (113) makes physical contact with cathode (110) and is sandwiched between cathode (110) and protective layer (114). Protective layer (114) is positioned to shield metallic layer (113) from high transient voltages.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: July 23, 2002
    Assignee: Motorola, Inc.
    Inventors: Gordon Tam, Ganming Qin, Barry P. O'Brien