Patents by Inventor Kouichi Kakuda

Kouichi Kakuda 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: 7799718
    Abstract: The present invention relates to a dielectric ceramic composition comprising a main component including at least one selected from barium titanate, strontium titanate and calcium titanate, and as a subcomponent, a glass component including an oxide of B, wherein a content of said glass component is 2 to 7 wt % with respect to 100 wt % of said main component. According to the present invention, there are provided a dielectric ceramic composition wherein a layer can be made thinner by relatively decreasing a content of the glass component, etc., as well as having good properties (specific permittivity, loss Q value and insulation resistance), and a complex electronic device such as a multilayer filter or a multilayer ceramic capacitor, which has a dielectric layer composed of the dielectric ceramic composition.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: September 21, 2010
    Assignee: TDK Corporation
    Inventors: Kouichi Kakuda, Takashi Suzuki, Sachiko Takano, Hiroshi Momoi, Shinichi Kondo, Masaki Takahashi
  • Publication number: 20090278627
    Abstract: A dielectric ceramic composition comprises as a main component, Cu oxide, Si oxide and one selected from the group consisting of Zn oxide alone and a combination of Mg oxide and Zn oxide, as a subcomponent, a glass component including B oxide and at least one selected from the group consisting of Si oxide, Ba oxide, Ca oxide, Sr oxide, Li oxide and Zn oxide, and having a glass softening point is 750° C. or less, wherein a content of said glass component is 1.5 to 15 wt % with respect to 100 wt % of said main component. According to the present invention, a dielectric ceramic composition can be provided which is available to be sintered at low temperature (for example, 950° C. or lower) while comparatively decreasing contents of a glass component, which shows good properties (specific permittivity, loss Q value and insulation resistance), and which is available to perform cofiring different materials.
    Type: Application
    Filed: May 11, 2009
    Publication date: November 12, 2009
    Applicant: TDK CORPORATION
    Inventors: Shusaku Umemoto, Takashi Suzuki, Kouichi Kakuda, Hiroshi Momoi, Masaki Takahashi, Shinichi Kondo
  • Publication number: 20080254968
    Abstract: The present invention relates to a dielectric ceramic composition comprising a main component including at least one selected from barium titanate, strontium titanate and calcium titanate, and as a subcomponent, a glass component including an oxide of B, wherein a content of said glass component is 2 to 7 wt % with respect to 100 wt % of said main component. According to the present invention, there are provided a dielectric ceramic composition wherein a layer can be made thinner by relatively decreasing a content of the glass component, etc., as well as having good properties (specific permittivity, loss Q value and insulation resistance), and a complex electronic device such as a multilayer filter or a multilayer ceramic capacitor, which has a dielectric layer composed of the dielectric ceramic composition.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 16, 2008
    Applicant: TDK CORPORATION
    Inventors: Kouichi Kakuda, Takashi Suzuki, Sachiko Takano, Hiroshi Momoi, Shinichi Kondo, Masaki Takahashi