Patents by Inventor Katsunari Moriai

Katsunari Moriai 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).

  • Publication number: 20090296312
    Abstract: A chip-type electronic component has: a ceramic element body; a plurality of first and second internal electrodes arranged in the ceramic element body so as to be opposed at least in part to each other; a first external connection conductor to which the plurality of first internal electrodes are connected; a second external connection conductor to which the plurality of second internal electrodes are connected; first and second terminal electrodes; a first internal connection conductor arranged in the ceramic element body and connecting the first external connection conductor and the first terminal electrode; and a second internal connection conductor arranged in the ceramic element body and connecting the second external connection conductor and the second terminal electrode.
    Type: Application
    Filed: May 21, 2009
    Publication date: December 3, 2009
    Applicant: TDK CORPORATION
    Inventors: Kaname Ueda, Dai Matsuoka, Naoki Chida, Izuru Soma, Hisayoshi Saito, Katsunari Moriai
  • Patent number: 7502213
    Abstract: A surge absorber has a first terminal electrode, a second terminal electrode, a third terminal electrode, an inductor portion, a surge absorbing portion, and a capacitor portion. The inductor portion has a first internal conductor and a second internal conductor mutually coupled in a polarity-reversed relation. One end of the first internal conductor is connected to the first terminal electrode. One end of the second internal conductor is connected to the second terminal electrode. The other end of the first internal conductor is connected to the other end of the second internal conductor. The surge absorbing portion has a first internal electrode connected to a connection point between the first internal conductor and the second internal conductor, and a second internal electrode connected to the third terminal electrode. The capacitor portion has a capacitance component connected between the first terminal electrode and the second terminal electrode.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: March 10, 2009
    Assignee: TDK Corporation
    Inventors: Dai Matsuoka, Yuji Terada, Katsunari Moriai
  • Patent number: 7167352
    Abstract: A multilayer chip varistor comprises a multilayer body and a pair of external electrodes formed on the multilayer body. The multilayer body has a varistor section and a pair of outer layer sections disposed so as to interpose said varistor section. The varistor section comprises a varistor layer developing a voltage nonlinear characteristic and a pair of internal electrodes disposed so as to interpose the varistor layer. The pair of external electrodes are connected to respective electrodes of the pair of internal electrodes. The relative dielectric constant of the outer layer sections is set lower than the relative dielectric constant of the region where the pair of internal electrodes in the varistor layer overlap each other.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: January 23, 2007
    Assignee: TDK Corporation
    Inventors: Dai Matsuoka, Katsunari Moriai, Takehiko Abe, Koichi Ishii
  • Publication number: 20070002513
    Abstract: A surge absorber has a first terminal electrode, a second terminal electrode, a third terminal electrode, an inductor portion, a surge absorbing portion, and a capacitor portion. The inductor portion has a first internal conductor and a second internal conductor mutually coupled in a polarity-reversed relation. One end of the first internal conductor is connected to the first terminal electrode. One end of the second internal conductor is connected to the second terminal electrode. The other end of the first internal conductor is connected to the other end of the second internal conductor. The surge absorbing portion has a first internal electrode connected to a connection point between the first internal conductor and the second internal conductor, and a second internal electrode connected to the third terminal electrode. The capacitor portion has a capacitance component connected between the first terminal electrode and the second terminal electrode.
    Type: Application
    Filed: June 9, 2006
    Publication date: January 4, 2007
    Applicant: TDK CORPORATION
    Inventors: Dai Matsuoka, Yuji Terada, Katsunari Moriai
  • Publication number: 20060261914
    Abstract: An object of the present invention is to provide a multilayer filter constructed so as to be less likely to suffer peeling between a varistor part and an inductor part. A multilayer filter 10 as a preferred embodiment has a structure in which a varistor part 20 and an inductor part are stacked. The varistor part 30 consists of a stack of varistor layers 31, 32 with internal electrodes 31a, 32a, and the varistor layers contain ZnO as a principal component, and contain at least one element selected from the group consisting of Pr and Bi, Co, and Al as additives. The inductor part 20 consists of a stack of inductor layers 21-24 with conductor patterns 21a-24a, and the inductor layers contain ZnO as a principal component and substantially contain neither Co nor Al.
    Type: Application
    Filed: May 1, 2006
    Publication date: November 23, 2006
    Applicant: TDK CORPORATION
    Inventors: Katsunari Moriai, Dai Matsuoka, Takahiro Sato
  • Publication number: 20060250211
    Abstract: A multilayer chip varistor comprises a multilayer body in which a plurality of varistor portions are arranged along a predetermined direction, and a plurality of terminal electrodes. Each varistor portion has a varistor layer to exhibit nonlinear voltage-current characteristics, and a plurality of internal electrodes disposed so as to interpose the varistor layer between them. Each terminal electrode is disposed on a first outer surface parallel to the predetermined direction out of outer surfaces of the multilayer body and is electrically connected to a corresponding internal electrode out of the plurality of internal electrodes. Each of the plurality of internal electrodes includes a first electrode portion overlapping with another first electrode portion between adjacent internal electrodes out of the plurality of internal electrodes, and a second electrode portion led from the first electrode portion so as to be exposed in the first outer surface.
    Type: Application
    Filed: March 28, 2006
    Publication date: November 9, 2006
    Applicant: TDK CORPORATION
    Inventors: Katsunari Moriai, Dai Matsuoka, Yo Saito
  • Publication number: 20050276001
    Abstract: A multilayer chip varistor comprises a multilayer body and a pair of external electrodes formed on the multilayer body. The multilayer body has a varistor section and a pair of outer layer sections disposed so as to interpose said varistor section. The varistor section comprises a varistor layer developing a voltage nonlinear characteristic and a pair of internal electrodes disposed so as to interpose the varistor layer. The pair of external electrodes are connected to respective electrodes of the pair of internal electrodes. The relative dielectric constant of the outer layer sections is set lower than the relative dielectric constant of the region where the pair of internal electrodes in the varistor layer overlap each other.
    Type: Application
    Filed: May 26, 2005
    Publication date: December 15, 2005
    Applicant: TDK CORPORATION
    Inventors: Dai Matsuoka, Katsunari Moriai, Takehiko Abe, Koichi Ishii