Patents by Inventor Alvin L. Krum

Alvin L. Krum 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).

  • Copper composites directly bonded to ceramics
    Patent number: 5601932
    Abstract: A ceramic member (52) is direct-bonded to a copper composite substrate by heating to diffuse copper to the surface of the copper composite substrate (56), oxidizing the copper composite substrate following heating, placing a ceramic member in contact with the resulting oxidized substrate, and forming a copper-copper oxide eutectic (54) at the interface between the copper composite substrate and the ceramic member by heating. The eutectic, upon cooling, forms a bond between the copper composite and the ceramic.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: February 11, 1997
    Assignee: Hughes Aircraft Company
    Inventors: Alvin L. Krum, William T. Campbell
  • Direct bonding of copper composites to ceramics
    Patent number: 5490627
    Abstract: A ceramic member (52) is direct-bonded to a copper composite substrate (58) by heating to diffuse copper to the surface (56) of the copper composite substrate, oxidizing the surface of the copper composite substrate following heating, placing a ceramic member in contact with the resulting oxidized substrate, and forming a copper-copper oxide eutectic (54) at the interface between the copper composite substrate and the ceramic member by heating. The eutectic, upon cooling, forms a bond between the copper composite and the ceramic.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: February 13, 1996
    Assignee: Hughes Aircraft Company
    Inventors: Alvin L. Krum, William T. Campbell
  • Optoelectronic hybrid package assembly including integral, self-aligned fiber optic connector
    Patent number: 5029968
    Abstract: A package housing (52) for hermetically enclosing an optoelectronic component (56) is formed with a tubular extension (54) which extends outwardly from a wall (52a) of the housing (52) and communicates with the interior of the housing (52) through an opening (52h) formed through the wall (52a). The axis of the extension (54) is self-aligned with a light propagating (transmitting or receiving) portion (56a) of the component (56) as mounted in the housing (52). A piece of optical fiber (60) has an end portion (60c, 60d) which is fittingly retained in the extension (54), and extends substantially from an outer end (54a) of the extension (54) to the light propagating portion (56a) of the component (56). A metal jacket (60b) is stripped from a portion (60c) of the optical fiber (60) which fits in a small diameter outer portion (54b) of the extension (54), whereas a portion (60d) of the optical fiber (60) covered with the jacket (60b) fits in a larger diameter inner portion (54c) of the extension (54).
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: July 9, 1991
    Assignee: Hughes Aircraft Company
    Inventors: Raymond W. Geiser, Jr., Alvin L. Krum, James T. Hartley
  • Low resistance electrical interconnection for synchronous rectifiers
    Patent number: 4766479
    Abstract: A technique is disclosed for making the high current-carrying electrical interconnections to the power FET devices in a synchronous rectifier circuit with extremely low lead resistance. All such interconnections are made with solder and pliable copper straps instead of by conventional wire bonds.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: August 23, 1988
    Assignee: Hughes Aircraft Company
    Inventors: Alvin L. Krum, Charles W. Conklin