Patents by Inventor Tetsuo Akoh

Tetsuo Akoh 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).

  • Formation of copper electrode on ceramic oxide
    Patent number: 4748086
    Abstract: A copper electrode is firmly bonded to a sintered ceramic oxide body by applying a first copper film on a ceramic oxide body by electroless plating or vapor phase plating such as evaporation or sputtering, forming a second copper film thereon by electrolytic plating, and heat treating the copper films on the body at a temperature of 750.degree. to 1065.degree. C. in a weakly oxidizing atmosphere.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: May 31, 1988
    Assignee: TDK Corporation
    Inventor: Tetsuo Akoh
  • Formation of copper electrode on aluminum nitride
    Patent number: 4737416
    Abstract: A copper electrode is firmly bonded to a sintered aluminum nitride body by applying a copper film on a sintered aluminum nitride body by electroless or electrolytic plating, evaporation or sputtering, and heat treating the copper film on the body at a temperature of 900.degree. to 1083.degree. C. in a weakly oxidizing atmosphere.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: April 12, 1988
    Assignee: TDK Corporation
    Inventors: Tetsuo Akoh, Hiroshi Tsuyuki, Toshihiro Suzuki, Kentaro Sawamura
  • Dielectric resonator and method for making
    Patent number: 4668925
    Abstract: An improved dielectric resonator for high frequency operation having improved unloaded Q is provided which is prepared by forming a first copper coating on the ceramic body to a thickness of 0.2 to 1 .mu.m by electroless plating or vacuum deposition, electrolytic plating a second copper coating on the first coating to a thickness of at least two-fold of the skin depth, and heat treating the thus coated body at 120.degree.-300.degree. C. in a reducing atmosphere or at 700.degree.-1080.degree. C. in a weakly acidic atmosphere.
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: May 26, 1987
    Assignee: TDK Corporation
    Inventors: Yoshishige Towatari, Tetsuo Akoh