Patents Examined by H. Mahoney
  • Monolithic ink jet printhead
    Patent number: 6022482
    Abstract: A method and structure are described for a monolithic roofshooter ink jet printhead which has nozzles and ink channels formed in a polyimide layer overlying a silicon substrate. Resistor heaters, addressing logic circuitry, and ink inlets are formed in a silicon substrate. A fabrication process, simple and monolithic, is performed at low temperatures resulting in a structure which has nozzle diameters of 30 .mu. separated by distances of 10 .mu. or less. This structure results in a printhead which has a printing resolution of 630 dpi.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: February 8, 2000
    Assignee: Xerox Corporation
    Inventors: Jingkuang Chen, Biay-Cheng Hseih