Patents by Inventor Shuumi Kumagai

Shuumi Kumagai 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: 7113389
    Abstract: A multilayer inductor has a rectangular parallelepiped element body and its length in the lengthwise direction (L), length in the direction of height (H), and length in the direction of width (W) are L?0.6 mm, H?0.3 mm, and W?0.3 mm, respectively. Terminal electrodes are provided so as to cover the vertices of the element body and come round to the side face from the end faces on both sides. The radius of curvature R of the vertex of the terminal electrode is set to a value being 10% or more and 20% or less of H or W.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: September 26, 2006
    Assignee: TDK Corporation
    Inventors: Michiru Ishifune, Yoji Tozawa, Toshiyuki Anbo, Hidekazu Sato, Shuumi Kumagai
  • Patent number: 7106161
    Abstract: A multilayer inductor is provided with a coil part including a coiled conductor and lead conductors, an outer sheath part covering the coil part and having an electrical isolation, and external electrodes electrically connected to the respective lead conductors. The lead conductors are located at both ends of the coiled conductor and have a width identical with that of the coiled conductor. The outer sheath part has two first side faces parallel to the axial direction of the coiled conductor and not adjacent to each other, and a second side face intersecting with the axial direction of the coiled conductor. Each external electrode has a first electrode portion formed throughout a direction perpendicular to the axial direction of the coiled conductor on the first side face. Each external electrode is not substantially formed on the second side face.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: September 12, 2006
    Assignee: TDK Corporation
    Inventors: Yoji Tozawa, Hidekazu Sato, Kunihiko Kawasaki, Yoshinori Mochizuki, Satoru Okamoto, Kouzou Sasaki, Michiru Ishifune, Shinichi Sato, Katsumi Abe, Shuumi Kumagai
  • Publication number: 20060006972
    Abstract: A multilayer inductor is provided with a coil part including a coiled conductor and lead conductors, an outer sheath part covering the coil part and having an electrical isolation, and external electrodes electrically connected to the respective lead conductors. The lead conductors are located at both ends of the coiled conductor and have a width identical with that of the coiled conductor. The outer sheath part has two first side faces parallel to the axial direction of the coiled conductor and not adjacent to each other, and a second side face intersecting with the axial direction of the coiled conductor. Each external electrode has a first electrode portion formed throughout a direction perpendicular to the axial direction of the coiled conductor on the first side face. Each external electrode is not substantially formed on the second side face.
    Type: Application
    Filed: June 10, 2005
    Publication date: January 12, 2006
    Applicant: TDK CORPORATION
    Inventors: Yoji Tozawa, Hidekazu Sato, Kunihiko Kawasaki, Yoshinori Mochizuki, Satoru Okamoto, Kouzou Sasaki, Michiru Ishifune, Shinichi Sato, Katsumi Abe, Shuumi Kumagai
  • Publication number: 20060007640
    Abstract: A multilayer inductor has a rectangular parallelepiped element body and its length in the lengthwise direction (L), length in the direction of height (H), and length in the direction of width (W) are L?0.6 mm, H?0.3 mm, and W?0.3 mm, respectively Terminal electrodes are provided so as to cover the vertices of the element body and come round to the side face from the end faces on both sides. The radius of curvature R of the vertex of the terminal electrode is set to a value being 10% or more and 20% or less of H or W.
    Type: Application
    Filed: June 10, 2005
    Publication date: January 12, 2006
    Applicant: TDK CORPORATION
    Inventors: Michiru Ishifune, Yoji Tozawa, Toshiyuki Anbo, Hidekazu Sato, Shuumi Kumagai
  • Patent number: 6568054
    Abstract: A method of producing a multilayer electronic part having the shape of a substantially rectangular parallelopiped is constituted which has a multilayer body formed by superposing coil conductors and green sheets of a magnetic or nonmagnetic material. Terminal electrodes are formed respectively on both ends of the multilayer body along the direction of the magnetic flux generated when current is caused to flow through the coil conductors in the multilayer body. The terminal electrodes each has a conductive substrate formed within the area of the end of the multilayer body and including a lamination body as a component of the multilayer body.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: May 27, 2003
    Assignee: TKD Corporation
    Inventors: Shuumi Kumagai, Kouzou Sasaki, Makoto Kobayashi, Noriyuki Saito, Hisayuki Abe, Toru Takahashi, Kenji Shibata
  • Patent number: 6147573
    Abstract: A multilayer electronic part having the shape of a substantially rectangular parallelopiped is constituted which has a multilayer body formed by superposing coil conductors and green sheets of a magnetic or nonmagnetic material. Terminal electrodes are formed respectively on both ends of the multilayer body along the direction of the magnetic flux generating when current is caused to flow through the coil conductors in the multilayer body. The terminal electrodes each has a conductive substrate formed within the area of the end of the multilayer body and consisting of a lamination body as a component of the multilayer body.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: November 14, 2000
    Assignee: TDK Corporation
    Inventors: Shuumi Kumagai, Kouzou Sasaki, Makoto Kobayashi, Noriyuki Saito, Hisayuki Abe, Toru Takahashi, Kenji Shibata