Patents by Inventor G. William Tasker

G. William Tasker 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).

  • Method of making thin-film continuous dynodes for electron multiplication
    Patent number: 5726076
    Abstract: The invention is directed to continuous dynodes formed by thin-film processing techniques. According to one embodiment of the invention, a continuous dynode is formed by reacting a chemical vapor in the presence of a substrate at a temperature and pressure sufficient to result in chemical vapor deposition. In another embodiment, the layer is formed by liquid phase deposition and in another embodiment, the layer is formed by nitriding or oxidizing a substrate.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: March 10, 1998
    Assignee: Center for Advanced Fiberoptic Applications
    Inventors: G. William Tasker, Jerry Randall Horton
  • Method for fabrication of microchannel electron multipliers
    Patent number: 5569355
    Abstract: The present invention discloses a method for constructing a completely micromachined MCP that is activated with thin-film dynodes wherein the interchannel regions are first dry etched in the substrate, resulting in channel pillars. The etched portions of the substrate are then back filled and the channel pillars are thereafter removed to produce a micromachined perforated microchannel plate. The technique may be employed to produce an active element for an integrated image tube or photomultiplier tube.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: October 29, 1996
    Assignee: Center for Advanced Fiberoptic Applications
    Inventors: Alan M. Then, Steven M. Shank, Robert J. Soave, G. William Tasker
  • Micro-fabricated electron multipliers
    Patent number: 5568013
    Abstract: A micromachined electron multiplier is disclosed wherein a substrate has at least one trench formed therein and an aperture cover is disposed on the substrate with at least one inlet aperture aligned with one end of the channel. Either the substrate or the apertured cover may have an outlet aperture formed therein. A variety of channel shapes, and arrays are disclosed as well as a solid state photomultiplier tube formed with an integrated radiation window and anode structure.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: October 22, 1996
    Assignee: Center for Advanced Fiberoptic Applications
    Inventors: Alan M. Then, Gregory L. Snider, Robert J. Soave, G. William Tasker
  • Fabrication of a microchannel plate from a perforated silicon
    Patent number: 5544772
    Abstract: Manufacture of a microchannel plate may be improved using photoelectrochemical etching and thin film activation such as CVD and nitriding and oxidizing wall surface portions of pores formed in the substrate. The pore pattern may be changed by oxidizing and etching the substrate prior to activation.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: August 13, 1996
    Assignee: Galileo Electro-Optics Corporation
    Inventors: Robert J. Soave, Alan M. Then, Steven M. Shank, G. William Tasker
  • Thin film continuous dynodes for electron multiplication
    Patent number: 5378960
    Abstract: A continuous thin film dynode includes a substrate with at least one channel having a channel wall, an isolation layer overlying the channel wall, and a thin film overlying the isolation layer. The thin film includes a current carrying portion and an electron emissive portion overlying the current carrying portion. The electron emissive portion is essentially free of a material which is silica-rich, alkali-rich, and lead-poor. The current carrying portion is essentially free of a material which is lead-rich.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: January 3, 1995
    Assignee: Galileo Electro-Optics Corporation
    Inventors: G. William Tasker, Jerry R. Horton
  • Method of manufacturing microchannel electron multipliers
    Patent number: 5205902
    Abstract: A microchannel plate and method is disclosed. In a preferred embodiment the microchannel plate is a water of anisotropically etchable material having been subjected to a directionally applied flux of reactive particles against at least one face of the wafer in selected areas corresponding to microchannel locations. The flux removes material from the selected areas to produce microchannels in the wafer in accordance with the directionality of the applied flux.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: April 27, 1993
    Assignee: Galileo Electro-Optics Corporation
    Inventors: Jerry R. Horton, G. William Tasker
  • Microchannel electron multipliers
    Patent number: 5086248
    Abstract: Microchannel plates (MCPs) and channel electron multipliers (CEMs) having channels etched by a directionally applied flux of reactive particles are disclosed. The channels are activated with thin film dynodes. Various embodiments including monolithic and stacked devices are disclosed. Activation of the channels is achieved by various techniques including CVD, LPD and native growth by oxidation.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: February 4, 1992
    Assignee: Galileo Electro-Optics Corporation
    Inventors: Jerry R. Horton, G. William Tasker
  • Fabrication of optical fibers with improved cross sectional circularity
    Patent number: 4154591
    Abstract: Optical fibers are produced with improved cross sectional circularity. In the course of the fabrication process, the tubular preform from which the fibers are drawn, is collapsed under positive internal pressure. This removes most cross sectional noncircularities that may have developed during fabrication of the preform, and also ensures the collapse of the preform to a structure with circular cross section.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: May 15, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: William G. French, G. William Tasker
  • Single mode optical transmission line
    Patent number: 4089586
    Abstract: A single mode optical transmission line consisting of a core and a clad, both formed from essentially the same type of multicomponent glass, e.g. borosilicate, for use with electromagnetic energy having a wavelength between 0.5.mu.m and 2.0.mu.m. The core has a higher refractive index than the clad because the relative concentrations of the constituents of the glass composition are varied between core and clad, e.g., the ratio of SiO.sub.2 /B.sub.2 O.sub.3 concentrations is higher in the core than in the clad.
    Type: Grant
    Filed: June 23, 1976
    Date of Patent: May 16, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: William George French, G. William Tasker