Patents by Inventor Shigemitsu Tomaki

Shigemitsu Tomaki 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: 7548141
    Abstract: A high frequency filter incorporates: an unbalanced input/output terminal; two balanced input/output terminals; two resonators respectively provided between the unbalanced input/output terminal and the two balanced input/output terminals; and a layered substrate for integrating components of the high frequency filter. The two resonators are inductively coupled to each other, and are also capacitively coupled to each other through two capacitors. Each of the two capacitors is formed using a pair of first and second electrodes and a dielectric layer. The first electrode is connected to one of the resonators via a through hole. The second electrode is connected to the other of the resonators and opposed to the first electrode forming the pair with the second electrode, the dielectric layer being disposed between the second electrode and the first electrode.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: June 16, 2009
    Assignee: TDK Corporation
    Inventors: Hideya Matsubara, Shigemitsu Tomaki, Shinichiro Toda, Atsunori Okada
  • Publication number: 20090121813
    Abstract: An electronic component includes first and second resonators provided within a layered substrate including stacked dielectric layers. The first resonator includes resonator-forming conductor layers of a first type and a second type. The resonator-forming conductor layers of the first type and the second type are reversed in relative positions of the short-circuited end and the open-circuited end, and are alternately arranged in the stacking direction of the dielectric layers. An input terminal is connected to all of the resonator-forming conductor layers of the first type. The second resonator includes resonator-forming conductor layers of a third type and a fourth type. The resonator-forming conductor layers of the third type and the fourth type are reversed in relative positions of the short-circuited end and the open-circuited end, and are alternately arranged in the stacking direction of the dielectric layers.
    Type: Application
    Filed: October 20, 2008
    Publication date: May 14, 2009
    Applicant: TDK CORPORATION
    Inventors: Shigemitsu Tomaki, Noriaki Ootsuka, Yoshikazu Tsuya, Kazushige Shinoda
  • Publication number: 20090121807
    Abstract: An electronic component includes a layered substrate including a plurality of dielectric layers stacked, and three resonators provided within the layered substrate. One of the three resonators includes resonator-forming conductor layers of a first type and a second type that each have a short-circuited end and an open-circuited end, relative positions of the short-circuited end and the open-circuited end being reversed between the first and second types. The resonator-forming conductor layers of the first type and the second type are arranged to be adjacent to each other in a direction in which the plurality of dielectric layers are stacked.
    Type: Application
    Filed: October 20, 2008
    Publication date: May 14, 2009
    Applicant: TDK CORPORATION
    Inventors: Shigemitsu Tomaki, Noriaki Ootsuka, Yoshikazu Tsuya, Kazushige Shinoda
  • Patent number: 7463120
    Abstract: A high frequency filter comprises a first resonator and a second resonator provided inside a layered substrate. The first and second resonators are inductively coupled and capacitively coupled to each other through a first capacitor and a second capacitor connected to each other in parallel. The first capacitor is formed using first and third electrodes and a dielectric layer. The first electrode is connected to the first resonator via a through hole. The third electrode is connected to the second resonator and opposed to the first electrode. The second capacitor is formed using second and fourth electrodes and the dielectric layer. The second electrode is connected to the second resonator via a through hole. The fourth electrode is connected to the first resonator and opposed to the second electrode.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: December 9, 2008
    Assignee: TDK Corporation
    Inventors: Hideya Matsubara, Shigemitsu Tomaki, Shinichiro Toda, Atsunori Okada
  • Patent number: 7432786
    Abstract: A high frequency filter incorporates first to third resonators provided inside a layered substrate. The first and third resonators are adjacent to each other and inductively coupled to each other. The second and third resonators are also adjacent to each other and inductively coupled to each other. The first and second resonators are not adjacent to each other but are capacitively coupled to each other through a conductor layer for capacitive coupling. The conductor layer for capacitive coupling incorporates: a first portion for forming a first capacitor between itself and the first resonator; a second portion for forming a second capacitor between itself and the second resonator; and a third portion having an end connected to the first portion and the other end connected to the second portion, the ends being opposed to each other in the longitudinal direction. The width of at least part of the third portion is smaller than the width of each of the first portion and the second portion.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: October 7, 2008
    Assignee: TDK Corporation
    Inventors: Shigemitsu Tomaki, Shinichiro Toda, Hideya Matsubara, Atsunori Okada
  • Publication number: 20070176712
    Abstract: A high frequency filter incorporates first to third resonators provided inside a layered substrate. The first and third resonators are adjacent to each other and inductively coupled to each other. The second and third resonators are also adjacent to each other and inductively coupled to each other. The first and second resonators are not adjacent to each other but are capacitively coupled to each other through a conductor layer for capacitive coupling. The conductor layer for capacitive coupling incorporates: a first portion for forming a first capacitor between itself and the first resonator; a second portion for forming a second capacitor between itself and the second resonator; and a third portion having an end connected to the first portion and the other end connected to the second portion, the ends being opposed to each other in the longitudinal direction. The width of at least part of the third portion is smaller than the width of each of the first portion and the second portion.
    Type: Application
    Filed: January 18, 2007
    Publication date: August 2, 2007
    Applicant: TDK CORPORATION
    Inventors: Shigemitsu Tomaki, Shinichiro Toda, Hideya Matsubara, Atsunori Okada
  • Publication number: 20070164840
    Abstract: A high frequency filter incorporates: an unbalanced input/output terminal; two balanced input/output terminals; two resonators respectively provided between the unbalanced input/output terminal and the two balanced input/output terminals; and a layered substrate for integrating components of the high frequency filter. The two resonators are inductively coupled to each other, and are also capacitively coupled to each other through two capacitors. Each of the two capacitors is formed using a pair of first and second electrodes and a dielectric layer. The first electrode is connected to one of the resonators via a through hole. The second electrode is connected to the other of the resonators and opposed to the first electrode forming the pair with the second electrode, the dielectric layer being disposed between the second electrode and the first electrode.
    Type: Application
    Filed: December 22, 2006
    Publication date: July 19, 2007
    Applicant: TDK CORPORATION
    Inventors: Hideya Matsubara, Shigemitsu Tomaki, Shinichiro Toda, Atsunori Okada
  • Publication number: 20070146101
    Abstract: A high frequency filter comprises a first resonator and a second resonator provided inside a layered substrate. The first and second resonators are inductively coupled and capacitively coupled to each other through a first capacitor and a second capacitor connected to each other in parallel. The first capacitor is formed using first and third electrodes and a dielectric layer. The first electrode is connected to the first resonator via a through hole. The third electrode is connected to the second resonator and opposed to the first electrode. The second capacitor is formed using second and fourth electrodes and the dielectric layer. The second electrode is connected to the second resonator via a through hole. The fourth electrode is connected to the first resonator and opposed to the second electrode.
    Type: Application
    Filed: December 22, 2006
    Publication date: June 28, 2007
    Applicant: TDK CORPORATION
    Inventors: Hideya Matsubara, Shigemitsu Tomaki, Shinichiro Toda, Atsunori Okada