Patents by Inventor Toshikazu Yasuda

Toshikazu Yasuda 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: 11069783
    Abstract: A semiconductor device includes a semiconductor substrate including a first conductivity-type impurity, a low-concentration impurity layer including a first conductivity-type impurity having a concentration lower than a concentration of the first conductivity-type impurity in the semiconductor substrate, a backside electrode including a metal material, and first and second transistors in the low-concentration impurity layer. The first transistor includes a first source electrode and a first gate electrode on a surface of the low-concentration impurity layer, the second transistor includes a second source electrode and a second gate electrode on the surface of the low-concentration impurity layer. The semiconductor substrate serves as a common drain region of the transistors.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: July 20, 2021
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Eiji Yasuda, Toshikazu Imai, Ryosuke Okawa, Takeshi Imamura, Mitsuaki Sakamoto, Kazuma Yoshida, Masaaki Hirako, Yasuyuki Masumoto, Shigetoshi Sota, Tomonari Oota
  • Publication number: 20140162134
    Abstract: A gel electrolyte secondary cell includes a positive electrode, a negative electrode and a gel electrolyte. The negative electrode includes a current collector, and a mixture of powders of a graphite carbonaceous material and a binder. The powders of the graphite carbonaceous material include sintered meso-carbon micro-beads. The gel electrolyte includes an electrolyte salt, a non-aqueous solvent and a high-molecular weight material. The non-aqueous solvent includes propylene carbonate and ethylene carbonate. A content of propylene carbonate ranges from 35 mol % to 75 mol %. The binder is in an amount 1 to 20 wt % based on total weight of the powders of the graphite carbonaceous material. The meso-carbon micro-beads can suitably decrease the impedance and the discharge capacity loss, thereby increasing the discharging capacity and/or charging/discharging efficiency of the gel electrolyte secondary cell.
    Type: Application
    Filed: February 18, 2014
    Publication date: June 12, 2014
    Applicant: Sony Corporation
    Inventors: Tadashi Senoo, Hiroyuki Akashi, Hideto Azuma, Mashio Shibuya, Kazuhiro Noda, Shinichiro Yamada, Toshikazu Yasuda, Koji Sekai
  • Publication number: 20130280617
    Abstract: A gel electrolyte secondary cell in which discharge capacity loss can be suppressed even with the use of a graphitized carbonaceous material of a small particle size as a negative electrode material to assure low impedance, superior cell voltage and load characteristics and high charging/discharging efficiency. To this end, a graphitized carbonaceous material prepared by firing meso-carbon micro-beads is used as a material for a negative electrode.
    Type: Application
    Filed: June 21, 2013
    Publication date: October 24, 2013
    Inventors: Tadashi Senoo, Hiroyuki Akashi, Hideto Azuma, Mashio Shibuya, Kazuhiro Noda, Shinichiro Yamada, Toshikazu Yasuda, Koji Sekai
  • Patent number: 7282299
    Abstract: A solid electrolyte battery includes a cathode having a cathode active material and a solid electrolyte and an anode. The solid electrolyte includes a first polymer having a binding force and a second polymer composed of alkali metal ion conducting polymers. Thus, the solid electrolyte battery has a high capacity and is excellent in its battery characteristics.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: October 16, 2007
    Assignee: Sony Corporation
    Inventors: Kazuhiro Noda, Toshikazu Yasuda, Takeshi Horie
  • Publication number: 20050019666
    Abstract: A lithium-ion battery includes a cathode and an anode capable of being doped with and dedoped from lithium and a solid electrolyte provided between the cathode and the anode. The solid electrolyte comprises a multi-layer structure having three layers or more. A layer nearest to the cathode side and a layer nearest to the anode side of the layers include first polymers which have a low glass transition point, do not have functional groups capable of being crosslinked and are not crosslinked. At least one layer except the layers located at positions nearest to the cathode side and the anode side of the layers includes a second polymer that has a functional group capable of being crosslinked and is crosslinked. Thus, the electrode utilization factor of the cathode and the anode is improved.
    Type: Application
    Filed: July 15, 2004
    Publication date: January 27, 2005
    Inventor: Toshikazu Yasuda
  • Patent number: 6576371
    Abstract: A solid electrolyte battery with improved utilization rate of electrodes and improved cycle characteristics, the solid electrolyte battery incorporating a positive electrode; a solid electrolyte layer formed on the positive electrode, the solid electrolyte layer having a multi-layer structure with a plurality of layers; and a negative electrode formed on the solid electrolyte layer, wherein a first solid electrolyte layer in the plurality of layers, the first solid electrolyte layer being the closest layer in the plurality of layers to the positive electrode, and the first solid electrolyte layer including a polymer having a glass transition point of −60° C. or lower when measured by using a differential scanning calorimeter and a number average molecular weight of 100,000 or larger, and at least one of the plurality of layers other than the first solid electrolyte layer being formed by crosslinking a polymer solid electrolyte having a functional group that can be crosslinked.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: June 10, 2003
    Assignee: Sony Corporation
    Inventors: Toshikazu Yasuda, Kazuhiro Noda, Takeshi Horie
  • Patent number: 6573009
    Abstract: A negative electrode (11) and a positive electrode (12) are arranged facing each other with an electrolyte (13) set between. The electrolyte (13) is obtained through polymerizing compounds for an electrolyte including compounds having ether linkages and functional groups capable of forming crosslinks, a siloxane derivative, and lithium salt. The compounds having ether linkages and functional groups capable of forming crosslinks form a three-dimensional network structure by polymerization. The siloxane derivative and lithium salt are compatible with the structure. This maintains high ability to be formed a film of great film strength, while increasing ion conductivity.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: June 3, 2003
    Assignee: Sony Corporation
    Inventors: Kazuhiro Noda, Takeshi Horie, Toshikazu Yasuda
  • Publication number: 20030044687
    Abstract: A solid electrolyte battery includes a cathode having a cathode active material and a solid electrolyte and an anode. The solid electrolyte includes a first polymer having a binding force and a second polymer composed of alkali metal ion conducting polymers. Thus, the solid electrolyte battery has a high capacity and is excellent in its battery characteristics.
    Type: Application
    Filed: April 24, 2002
    Publication date: March 6, 2003
    Inventors: Kazuhiro Noda, Toshikazu Yasuda, Takeshi Horie
  • Publication number: 20010055719
    Abstract: A lithium cell, having positive and negative electrodes capable of occluding and releasing lithium and a non-aqueous electrolyte. The cell of the present invention includes a positive electrode, a negative electrode and a gelated electrolyte composed of a polyacrylonitrile containing high molecular material, a &ggr;-caprolactone containing non-aqueous solvent and an electrolyte salt mainly comprised of LiPF6, with the content of &ggr;-caprolactone in the gelated electrolyte being 30 mol % or less. With the gelated electrolyte composed of the polyacrylonitrile containing high molecular material, non-aqueous solvent and the electrolyte salt mainly composed of LiPF6, a carbide film is formed on the electrode surface, on contact with the flame, as a result of the carbonization of the high molecular material and the carbonization accelerating operation of LiPF6. This carbide film inhibits inflammation for realizing superior combustion retardant properties.
    Type: Application
    Filed: June 19, 1998
    Publication date: December 27, 2001
    Inventors: HIROYUKI AKASHI, TADASHI SENOO, MASHIO SHIBUYA, KAZUHIRO NODA, SHINICHIRO YAMADA, TOSHIKAZU YASUDA, KOJI SEKAI
  • Publication number: 20010016286
    Abstract: A gel electrolyte secondary cell in which discharge capacity loss can be suppressed even with the use of a graphitized carbonaceous material of a small particle size as a negative electrode material to assure low impedance, superior cell voltage and load characteristics and high charging/discharging efficiency. To this end, a graphitized carbonaceous material prepared by firing meso-carbon micro-beads is used as a material for a negative electrode 9.
    Type: Application
    Filed: September 30, 1998
    Publication date: August 23, 2001
    Inventors: TADASHI SENOO, HIROYUKI AKASHI, HIDETO AZUMA, MASHIO SHIBUYA, KAZUHIRO NODA, SHINICHIRO YAMADA, TOSHIKAZU YASUDA, KOJI SEKAI