Patents by Inventor Takashi Ohtsuka

Takashi Ohtsuka 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: 20210305231
    Abstract: Disclosed herein is an electronic component that includes a substrate, a functional layer formed on the substrate and having a plurality of alternately stacked conductor layers and insulating layers, and a plurality of terminal electrodes provided on an uppermost one of the insulating layers. The uppermost one of the insulating layers has a substantially rectangular planar shape and has a protruding part protruding in a planar direction from at least one side in a plan view.
    Type: Application
    Filed: March 19, 2021
    Publication date: September 30, 2021
    Applicant: TDK CORPORATION
    Inventors: Yusuke OBA, Kenichi YOSHIDA, Takashi OHTSUKA, Yuichiro OKUYAMA, Tomoya HANAI, Yu FUKAE
  • Publication number: 20210225593
    Abstract: Disclosed herein is an electronic component that includes a substrate; and a plurality of conductive layers and a plurality of insulating layers which are alternately laminated on the substrate. The side surface of a predetermined one of the plurality of insulating layers has a recessed part set back from a side surface of the substrate and a projecting part projecting from the recessed part. The recessed part is covered with a first dielectric film made of an inorganic insulating material.
    Type: Application
    Filed: January 7, 2021
    Publication date: July 22, 2021
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIKAWA, Kenichi YOSHIDA, Takashi OHTSUKA, Yuichiro OKUYAMA, Takeshi OOHASHI, Hajime KUWAJIMA
  • Publication number: 20210219430
    Abstract: Disclosed herein is an electronic component that includes a substrate and a plurality of conductive layers and a plurality of insulating layers which are alternately laminated on the substrate. The side surface of at least one of the plurality of insulating layers has a recessed part set back from a side surface of the substrate and a projecting part projecting from the recessed part.
    Type: Application
    Filed: December 26, 2020
    Publication date: July 15, 2021
    Applicant: TDK CORPORATION
    Inventors: Yuichiro OKUYAMA, Takeshi OOHASHI, Hajime KUWAJIMA, Takashi OHTSUKA, Kazuhiro YOSHIKAWA, Kenichi YOSHIDA
  • Publication number: 20210204406
    Abstract: Disclosed herein is an electronic component that includes a first conductive layer including a lower electrode and a first inductor pattern, a dielectric film that covers the lower electrode, an upper electrode laminated on the lower electrode through the dielectric film, an insulating layer that covers the first conductive layer, dielectric film, and upper electrode, and a second conductive layer formed on the insulating layer and including a second inductor pattern. The first and second inductor patterns are connected in parallel through via conductors penetrating the insulating layer.
    Type: Application
    Filed: December 23, 2020
    Publication date: July 1, 2021
    Inventors: Takeshi OOHASHI, Shinichiro TODA, Daiki KUSUNOKI, Takashi OHTSUKA, Kazuhiro YOSHIKAWA, Kenichi YOSHIDA
  • Publication number: 20210057721
    Abstract: Provided is a lithium ion secondary battery having high energy density and excellent cycle characteristics, and hardly causing burning. The present invention relates to a lithium ion secondary battery comprising an electrode mixture layer comprising an electrode active material comprising Si alloy having a median diameter of 1.2 ?m or less and 12% by weight or more and 50% by weight or less of an electrode binder; and an electrolyte solution comprising 60% by volume or more and 99% by volume or less of a phosphoric acid ester compound, 0% by volume or more and 30% by volume or less of a fluorinated ether compound, and 1% by volume or more and 35% by volume or less of a fluorinated carbonate compound, wherein the total amount of the phosphoric acid ester compound and the fluorinated ether compound is 65% by volume or more.
    Type: Application
    Filed: November 21, 2018
    Publication date: February 25, 2021
    Applicant: NEC CORPORATION
    Inventors: Daisuke KAWASAKI, Takashi OHTSUKA, Kazuhiko INOUE
  • Publication number: 20200211749
    Abstract: An LC composite component includes a magnetic substrate with magnetism, a magnetic layer with magnetism, inductors, capacitors, and core parts with magnetism. The magnetic substrate includes a first surface and a second surface on a side opposite to the first surface. The magnetic layer is disposed to face the first surface of the magnetic substrate. The inductors and the capacitors are disposed between the first surface of the magnetic substrate and the magnetic layer. The core parts are disposed between the first surface of the magnetic substrate and the magnetic layer and connected to the magnetic layer. The thickness of the core part is 1.0 or more times the thickness of the magnetic layer, the thickness of the magnetic substrate is 1.0 or more times the thickness of the magnetic layer.
    Type: Application
    Filed: December 23, 2019
    Publication date: July 2, 2020
    Applicant: TDK Corporation
    Inventors: Yoshihiro SHINKAI, Yuichiro OKUYAMA, Yusuke ARIAKE, Tomoya HANAI, Isao KANADA, Takashi OHTSUKA
  • Publication number: 20200211782
    Abstract: An LC composite component includes a non-magnetic substrate, a magnetic layer with magnetism, capacitors, inductors, and core parts with magnetism. The non-magnetic substrate includes a first surface and a second surface on a side opposite to the first surface. The magnetic layer is disposed to face the first surface of the non-magnetic substrate. The inductors and the capacitors are disposed between the first surface of the non-magnetic substrate and the magnetic layer. The core parts are disposed between the first surface of the non-magnetic substrate and the magnetic layer and connected to the magnetic layer. The thickness of the core parts is 1.0 or more times the thickness of the magnetic layer in a direction perpendicular to the first surface of the non-magnetic substrate, and each of the magnetic layer and the core parts contains magnetic metal particles and resin.
    Type: Application
    Filed: December 23, 2019
    Publication date: July 2, 2020
    Applicant: TDK CORPORATION
    Inventors: Yoshihiro SHINKAI, Yuichiro OKUYAMA, Tomoya HANAI, Yusuke ARIAKE, Isao KANADA, Takashi OHTSUKA
  • Publication number: 20200194776
    Abstract: Provided is a lithium ion secondary battery having high energy density and excellent cycle characteristics. The present invention relates to a negative electrode for a lithium ion secondary battery comprising: (i) a negative electrode mixture layer comprising a negative electrode active material and a negative electrode binder and (ii) a negative electrode current collector, wherein the negative electrode active material comprises an alloy comprising silicon (Si alloy), the Si alloy is crystalline and has a median diameter (D50 particle size) of 1.2 ?m or less, and an amount of the negative electrode binder based on the weight of the negative electrode mixture layer is 12% by weight or more and 50% by weight or less.
    Type: Application
    Filed: August 17, 2018
    Publication date: June 18, 2020
    Applicant: NEC CORPORATION
    Inventors: Daisuke KAWASAKI, Takuya HASEGAWA, Takashi OHTSUKA
  • Patent number: 10644347
    Abstract: A negative electrode active material constituting a lithium ion secondary battery having high energy density and excellent cycle characteristics, and a negative electrode and a lithium ion secondary battery comprising the same are provided. The present invention relates to a negative electrode active material comprising graphite particles and crystalline silicon particles, wherein a median diameter of the crystalline silicon particles is 0.7 ?m or less, and a weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: May 5, 2020
    Assignee: NEC Corporation
    Inventors: Daisuke Kawasaki, Takashi Ohtsuka, Suguru Tamai, Noboru Yoshida, Shinya Sudo
  • Publication number: 20190313528
    Abstract: Disclosed herein is a multilayer wiring structure that includes a first metal layer; an interlayer insulating film formed on the first metal layer, the interlayer insulating film having an opening that exposes a first area of the first metal layer; a second metal layer formed on an inner wall of the opening; and a third metal layer filling the opening via the second metal layer. The first and third metal layers are direct contact with each other at a bottom of the opening.
    Type: Application
    Filed: April 3, 2019
    Publication date: October 10, 2019
    Applicant: TDK Corporation
    Inventors: Hajime Kuwajima, Tomonaga Nishikawa, Takashi Ohtsuka, Takeshi Oohashi, Yuichiro Okuyama, Manabu Yamatani
  • Patent number: 10426032
    Abstract: Disclosed herein is a multilayer wiring structure that includes a first metal layer; an interlayer insulating film formed on the first metal layer, the interlayer insulating film having an opening that exposes a first area of the first metal layer; a second metal layer formed on an inner wall of the opening; and a third metal layer filling the opening via the second metal layer. The first and third metal layers are direct contact with each other at a bottom of the opening.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: September 24, 2019
    Assignee: TDK CORPORATION
    Inventors: Hajime Kuwajima, Tomonaga Nishikawa, Takashi Ohtsuka, Takeshi Oohashi, Yuichiro Okuyama, Manabu Yamatani
  • Publication number: 20190051928
    Abstract: A negative electrode active material constituting a lithium ion secondary battery having high energy density and excellent cycle characteristics, and a negative electrode and a lithium ion secondary battery comprising the same are provided. The present invention relates to a negative electrode active material comprising graphite particles and crystalline silicon particles, wherein a median diameter of the crystalline silicon particles is 0.7 ?m or less, and a weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less.
    Type: Application
    Filed: February 22, 2017
    Publication date: February 14, 2019
    Inventors: Daisuke KAWASAKI, Takashi OHTSUKA, Suguru TAMAI, Noboru YOSHIDA, Shinya SUDO
  • Patent number: 8419295
    Abstract: In a photoelectric conversion/connection device (100) including an optical element (320), a mounting board (310) on which the optical element is mounted, and an optical connector (400) which is connected to the mounting board so as to be optically connected to the optical element, the optical connector (400) is arranged on a surface (310a) opposite to a mounting surface (310b) of the mounting board (310) and the optical element (320) is exposed. The photoelectric conversion/connection device (100) includes a motherboard (210) having a main surface (210a) and an electric connector (220) to be mounted on the main surface of the motherboard. The electric connector (220) is detachably connected to the mounting board (310).
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: April 16, 2013
    Assignees: Japan Aviation Electronics Industry, Limited, NEC Corporation
    Inventors: Yuichi Koreeda, Wataru Ohtsu, Mikio Oda, Hisaya Takahashi, Takashi Ohtsuka, Hikaru Kouta, Hideyuki Ono
  • Patent number: 8351185
    Abstract: The invention provides an electronic component and a manufacturing method thereof that can achieve an improved adhesion strength when the electronic component is solder-mounted onto an external substrate and can thereby obtain considerably improved electric properties and reliabilities, etc. An electronic component, which is a capacitor 1, has: a circuit element 5a formed on a substrate 2; an electrode layer 5b connected to the circuit element 5a; passivation layers 6 and 8 that cover the electrode layer 5b; and terminal electrodes 9a and 9b connected to the electrode layer 5b via via-conductors Va and Vb formed through the passivation layers 6 and 8, the terminal electrodes 9a and 9b being formed to cover the side wall of the passivation layers 6 and 8.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: January 8, 2013
    Assignee: TDK Corporation
    Inventors: Takashi Ohtsuka, Kyung-Ku Choi, Tatsuo Namikawa, Hitoshi Yamaguchi
  • Patent number: 8345424
    Abstract: Provided is an optical interconnection device in which a volume required for cooling is reduced. In the optical interconnection device, a plurality of optical modules (12) are arranged on a periphery of an LSI (11) electrically connected to an electric wiring board (10), and liquid cooling mechanisms (13, 14) are respectively placed on the LSI (11) and the optical modules (12). The plurality of optical modules (12) may be arranged only on a surface of the electric wiring board (10) where the LSI (11) is mounted, only on a surface opposite to the surface where the LSI (11) is mounted, or on both the same surface as and the opposite surface to the surface where the LSI (11) is mounted.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: January 1, 2013
    Assignee: NEC Corporation
    Inventors: Mikio Oda, Tomotaka Ishida, Hisaya Takahashi, Hideyuki Ono, Jun Sakai, Takashi Ohtsuka, Arihide Noda, Hikaru Kouta
  • Patent number: 8324509
    Abstract: The invention provides an electronic component and a manufacturing method thereof that: can allow electronic components to be mounted on an external substrate at a higher density than before; can adjust the height (level) of a terminal electrode as required and desired, thereby solving problems that would occur in the inspection of the conventional electronic components; and can also improve the yield in the mounting of electronic components, thereby achieving increased productivity.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: December 4, 2012
    Assignee: TDK Corporation
    Inventors: Takashi Ohtsuka, Kyung-Ku Choi, Tatsuo Namikawa, Hitoshi Yamaguchi
  • Patent number: 8297855
    Abstract: An optical connector 1 is for connecting a connection object 10 to an optical module 21. A slider 3 is slidably held by a housing 2 adapted for positioning the connection object and the optical module. The housing has a first positioning portion for receiving the connection object. The slider has a first pressing portion 3a for elastically pressing the connection object in a first direction toward the first positioning portion and a second pressing portion 3e that elastically acts in a second direction perpendicular to the first direction.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: October 30, 2012
    Assignees: Japan Aviation Electronics Industry, Limited, NEC Corporation
    Inventors: Yuichi Koreeda, Hikaru Kouta, Kaichiro Nakano, Hisaya Takahashi, Takashi Ohtsuka, Hideyuki Ono
  • Publication number: 20110183208
    Abstract: A negative-electrode active material for nonaqueous electrolyte secondary battery, comprising a silicon compound capable of inserting and extracting lithium ion, wherein the silicon compound contains silicon-hydrogen bonds and the silicon-hydrogen bonds are introduced into the compound by reduction of at least one compound selected from the group consisting of silicon oxide, silicon nitride and silicon carbide with hydrogen, and a negative electrode for nonaqueous electrolyte secondary battery having a layer containing the negative-electrode active material in the above arrangement formed on a current collector.
    Type: Application
    Filed: April 4, 2011
    Publication date: July 28, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Takashi OHTSUKA, Sumihito Ishida, Hiroaki Matsuda
  • Patent number: 7964319
    Abstract: An object of the present invention is to provide a fuel cell that operates in a temperature range of not lower than 100° C., and a method for manufacturing such a fuel cell. The fuel cell of the present invention has a proton conductive gel, an anode electrode, and a cathode electrode, the proton conductor being sandwiched between the anode electrode and the cathode electrode, in which the proton conductive gel is composed of SnO2, NH3, H2O, and H3PO4, and provided that the molar ratio represented by NH3/SnO2 is X, and the molar ratio represented by P/Sn is Y, X is not less than 0.2 and not greater than 5, and Y is not less than 1.6 and not greater than 3.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: June 21, 2011
    Assignee: Panasonic Corporation
    Inventors: Takashi Ohtsuka, Tomoyuki Komori, Atsushi Omote, Yuji Zenitani
  • Publication number: 20110044011
    Abstract: The invention provides an electronic component and a manufacturing method thereof that can achieve an improved adhesion strength when the electronic component is solder-mounted onto an external substrate and can thereby obtain considerably improved electric properties and reliabilities, etc. An electronic component, which is a capacitor 1, has: a circuit element 5a formed on a substrate 2; an electrode layer 5b connected to the circuit element 5a; passivation layers 6 and 8 that cover the electrode layer 5b; and terminal electrodes 9a and 9b connected to the electrode layer 5b via via-conductors Va and Vb formed through the passivation layers 6 and 8, the terminal electrodes 9a and 9b being formed to cover the side wall of the passivation layers 6 and 8.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 24, 2011
    Applicant: TDK CORPORATION
    Inventors: Takashi OHTSUKA, Kyung-Ku Choi, Tatsuo Namikawa, Hitoshi Yamaguchi