Patents by Inventor Yuichirou Murata

Yuichirou Murata 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).

  • Multilayer circuit board for high frequency signals
    Patent number: 6953349
    Abstract: A multilayer circuit board for high-frequency signals includes: a multilayer wiring board unit including, at least one wiring layer, one or more ground layers configured by a conductive material, insulating layers between the layers, and a first external electrode electrically connected to a transmission line on an episurface; and a connector unit including a second external electrode electrically connected to the first external electrode, and a fitting portion for holding on the multilayer wiring board unit an external circuit board or an external connector. The distance d between the first external electrode (7) and the ground layer perpendicularly below and most closely disposed to the first external electrode is determined within the range dl?d?du with respect to the values dl and du defined based on tolerance of the impedance ?Z.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: October 11, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Junichi Abe, Yuichirou Murata
  • Multilayer circuit board for high frequency signals
    Publication number: 20040246064
    Abstract: A multilayer circuit board for high-frequency signals includes: a multilayer wiring board unit including, at least one wiring layer, one or more ground layers configured by a conductive material, insulating layers between the layers, and a first external electrode electrically connected to a transmission line on an episurface; and a connector unit including a second external electrode electrically connected to the first external electrode, and a fitting portion for holding on the multilayer wiring board unit an external circuit board or an external connector. The distance d between the first external electrode (7) and the ground layer perpendicularly below and most closely disposed to the first external electrode is determined within the range dl≦d≦du with respect to the values dl and du defined based on tolerance of the impedance &Dgr;Z.
    Type: Application
    Filed: May 21, 2004
    Publication date: December 9, 2004
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Junichi Abe, Yuichirou Murata