Patents by Inventor Bruce A. Vojak

Bruce A. Vojak 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).

  • Patent number: 6563257
    Abstract: A discharge device of the invention includes multiple bonded ceramic layers with electrodes formed between the layers. It can be combined with the various MCIC technologies to produce myriad useful devices. Contacts are made to the electrodes, which may be grouped in different arrangements. The electrodes contact a hole through some or all of the ceramic layers to define a discharge cavity. Different groupings of the electrodes will produce different types of discharge. Alternating the electrodes in interdigitated pairs permits an arbitrary extension of the discharge cavity length. Having consecutive anodes or cathodes permits formation of regions where electrons may cool. Another device of the invention includes a multilayer ceramic structure having a hole formed in a least one outer layer through an electrode on the outer side of the layer and in contact with an electrode between two layers. A contact is formed to the electrode between layers through any remaining layers in the multilayer ceramic structure.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: May 13, 2003
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Bruce A. Vojak, J. Gary Eden, Sung-Jin Park, Clark Wagner
  • Publication number: 20020113553
    Abstract: A discharge device of the invention includes multiple bonded ceramic layers with electrodes formed between the layers. It can be combined with the various MCIC technologies to produce myriad useful devices. Contacts are made to the electrodes, which may be grouped in different arrangements. The electrodes contact a hole through some or all of the ceramic layers to define a discharge cavity. Different groupings of the electrodes will produce different types of discharge. Alternating the electrodes in interdigitated pairs permits an arbitrary extension of the discharge cavity length. Having consecutive anodes or cathodes permits formation of regions where electrons may cool. Another device of the invention includes a multilayer ceramic structure having a hole formed in a least one outer layer through an electrode on the outer side of the layer and in contact with an electrode between two layers. A contact is formed to the electrode between layers through any remaining layers in the multilayer ceramic structure.
    Type: Application
    Filed: December 29, 2000
    Publication date: August 22, 2002
    Applicant: The Board of Trustees of the University
    Inventors: Bruce A. Vojak, J. Gary Eden, Sung-Jin Park, Clark Wagner
  • Patent number: 5815054
    Abstract: A high frequency acoustic wave piezoelectric device (10) having parallel etched channels cut into a surface of a piezoelectric substrate so as to form micromachined ridges (20). Top electrodes (30) are located on tops (26) of the ridges (20) and bottom electrodes (32) are located on bottoms of the channels in spacings (22) between ridges (20). The top and bottom electrodes (30, 32) are offset from each other and substantially non-opposing. The electrodes (30, 32) generate a sufficient vertical electrical field (38) when driven to cause the ridges (20) to resonate. A height (28) of the ridges (20) define the operating frequency. The ridges (20) can be made small enough to produce frequencies well over 100 MHz in a fundamental bulk acoustic wave mode.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: September 29, 1998
    Assignee: Motorola Inc.
    Inventors: Bruce Vojak, Jiashi Yang, Jin Huang, John Mattson
  • Patent number: 4901330
    Abstract: An optically pumped laser which includes a laser diode array for generating optically pumped radiation having a uniform intensity distributed over a broad band-width, and a lasant material with an absorption band for receiving radiation within such bandwidth.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: February 13, 1990
    Assignee: Amoco Corporation
    Inventors: Thomas Wolfram, Bruce A. Vojak, Edward T. Maas, Jr., Robert D. Burnham
  • Patent number: 4791648
    Abstract: A laser which contains a substantially planar waveguide wherein the waveguide along the direction of light propagation is comprised of varying combinations of high-gain and low-gain regions so that the cumulative gain from one end of the optical cavity to the other varies as a function of position along a line within the plane of said waveguide which is perpendicular to the direction of light propagation.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: December 13, 1988
    Assignee: Amoco Corporation
    Inventors: Bruce A. Vojak, Sang K. Sheem