Patents by Inventor Hiroyasu Konakaka

Hiroyasu Konakaka 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).

  • Dielectric ceramic, method for making the same, and monolithic ceramic capacitor
    Patent number: 6829136
    Abstract: A dielectric ceramic is composed of ABO3 as the main component and a rare earth element, wherein A represents barium which may be partly replaced with at least one of calcium and strontium, and B represents titanium which may be partly replaced with at least one selected from zirconium and hafnium. At least 70% of crystal grains of the dielectric ceramic have a cross-section in which a first region containing dissolved rare earth element occupies 5 to 70% of the area of the cross section and a second region free of the dissolved rare earth element occupies 10 to 80% of the periphery of the cross-section. A monolithic ceramic capacitor having thin dielectric ceramic layers composed of this dielectric ceramic exhibits superior capacitance-temperature characteristics and high reliability.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: December 7, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tomoyuki Nakamura, Hiroyasu Konakaka, Harunobu Sano
  • Dielectric ceramic, method for making the same, and monolithic ceramic capacitor
    Publication number: 20040105214
    Abstract: A dielectric ceramic is composed of ABO3 as the main component and a rare earth element, wherein A represents barium which may be partly replaced with at least one of calcium and strontium, and B represents titanium which may be partly replaced with at least one selected from zirconium and hafnium. At least 70% of crystal grains of the dielectric ceramic have a cross-section in which a first region containing dissolved rare earth element occupies 5 to 70% of the area of the cross section and a second region free of the dissolved rare earth element occupies 10 to 80% of the periphery of the cross-section. A monolithic ceramic capacitor having thin dielectric ceramic layers composed of this dielectric ceramic exhibits superior capacitance-temperature characteristics and high reliability.
    Type: Application
    Filed: November 12, 2003
    Publication date: June 3, 2004
    Inventors: Tomoyuki Nakamura, Hiroyasu Konakaka, Harunobu Sano