Patents by Inventor Terry E McMahon

Terry E McMahon 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).

  • Circuit routing for printhead having increased corrosion resistance
    Patent number: 7798611
    Abstract: The present invention includes as one embodiment an ink jet printhead having a circuit with plural resistors and a power bus. The printhead includes a metal stack formed within the circuit, which is comprised of a first metal layer and a second metal layer and at least one power via. The power via is formed within the circuit as an interface between the first metal layer and the second metal layer and acts as a separation barrier between conductive portions of the resistors and the power bus.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: September 21, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: William B. Connors, Terry E McMahon, Donald W Schulte, Keith Moore
  • Drop generator for ultra-small droplets
    Patent number: 7490924
    Abstract: A drop generator includes a substrate, and a mandrel that is disposed on the substrate for shaping the drop generator chamber. The mandrel is covered by the orifice member and thereafter removed.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: February 17, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Charles C Haluzak, Kenneth E. Trueba, Terry E McMahon, Donald W Schulte
  • Substrate and method of forming substrate for fluid ejection device
    Patent number: 7282448
    Abstract: A method of forming an opening through a substrate having a first side and a second side opposite the first side includes forming spaced etch stops in the first side of the substrate, etching into the substrate from the second side toward the first side to the spaced etch stops, and etching into the substrate between the spaced etch stops from the second side. Etching into the substrate to the spaced etch stops includes forming a first portion of the opening and etching into the substrate between the spaced etch stops includes forming a second portion of the opening.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: October 16, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Chien-Hua Chen, Donald W. Schulte, Terry E McMahon
  • Drop generator for ultra-small droplets
    Patent number: 7125731
    Abstract: A drop generator includes a substrate, and a mandrel that is disposed on the substrate for shaping the drop generator chamber. The mandrel is covered by the orifice member and thereafter removed.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: October 24, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Charles C Haluzak, Kenneth E. Trueba, Terry E McMahon, Donald W Schulte
  • Circuit routing for printhead having increased corrosion resistance
    Patent number: 7083265
    Abstract: The present invention includes as one embodiment a printhead having a circuit with plural resistors and a power bus. The printhead includes a metal stack formed within the circuit, which is comprised of a first metal layer and a second metal layer and at least one power via. The power via is formed within the circuit as an interface between the first metal layer and the second metal layer and acts as a corrosion separation barrier between of the resistors and the power bus.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: August 1, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: William B. Connors, Terry E McMahon, Donald W Schulte, Keith Moore
  • Dielectric light device
    Patent number: 7078855
    Abstract: A light device includes an electron supply defining an emitter surface. A dielectric tunneling layer is disposed between the electron supply and a cathode layer. The cathode layer has at least partial photon transparency that is substantially uniform across the emitter surface.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: July 18, 2006
    Inventors: Zhizhang Chen, Sriram Ramamoorthi, Terry E McMahon, Timothy F. Myers
  • Dielectric light device
    Patent number: 6882100
    Abstract: A light device includes an electron supply defining an emitter surface. A dielectric tunneling layer is disposed between the electron supply and a cathode layer. The cathode layer has at least partial photon transparency that is substantially uniform across the emitter surface.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: April 19, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Sriram Ramamoorthi, Terry E McMahon, Timothy F. Myers