Patents by Inventor Akira Yajima

Akira Yajima 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: 20090181310
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.
    Type: Application
    Filed: March 25, 2009
    Publication date: July 16, 2009
    Inventors: Hirotaka Hayashida, Akira Yajima
  • Publication number: 20090011321
    Abstract: A fuel cell comprising a cathode catalyst layer, an anode catalyst layer including a conductive perfluoro-binder having a micellar structure formed by outwardly orienting hydrophobic (lipophilic) groups and inwardly orienting hydrophilic groups, and a proton conductive membrane provided between the cathode catalyst layer and the anode catalyst layer.
    Type: Application
    Filed: August 10, 2007
    Publication date: January 8, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hirofumi KAN, Asako Satoh, Akira Yajima, Yumiko Takizawa, Hiroyuki Shiroki
  • Publication number: 20080305771
    Abstract: In a mobile terminal having a security function, both convenience and security protection are realized so as to prevent a user from feeling bothersome. A mobile phone has an operation control unit which sets the operation of various functions of the mobile terminal to be unusable at any timing. When a used state determination unit determines that the mobile phone is not in an abnormal state and not left, the operation control unit controls operation of the various functions to maintain usable states.
    Type: Application
    Filed: June 2, 2008
    Publication date: December 11, 2008
    Applicant: NEC CORPORATION
    Inventors: Akira Yajima, Naotake Fujita
  • Patent number: 7455933
    Abstract: A nonaqueous electrolyte secondary battery includes a nonaqueous electrolyte and a positive electrode including an active material containing lithium composite oxide powder, the lithium composite oxide powder includes secondary particles, exhibits a peak intensity ratio satisfying the following formula (4), satisfies the following formula (5), and has a particle distribution wherein a particle diameter at a volumetric cumulative frequency of 90% (D90) falls within the range of 10 to 25 m, and the nonaqueous electrolyte contains a sultone compound including a ring having at least one double bond; 2?(I003/I104)<5 ??(4) 0.95?(XLi/XM)?1.02.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: November 25, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nao Shimura, Koshin Tanaka, Masahiro Sekino, Asako Satoh, Shusuke Inada, Akira Yajima, Masayuki Oguchi
  • Publication number: 20080176143
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode group having a positive electrode and a negative electrode wound flatly by way of an interposed separator, a positive electrode tab electrically connected to the positive electrode, and projecting from a spiral winding surface of the electrode group, a negative electrode tab electrically connected to the negative electrode, and projecting from the spiral winding surface, and a nonaqueous electrolyte, wherein the nonaqueous solvent contains sultone compound including a ring having at least one double bond, and a distance between the positive electrode tab and the negative electrode tab is 6 mm to 18 mm.
    Type: Application
    Filed: August 6, 2007
    Publication date: July 24, 2008
    Inventors: Shusuke INADA, Masahiro Sekino, Akira Yajima, Nao Shimura, Asako Satoh, Masayuki Oguchi, Hiroshi Kitayama
  • Publication number: 20080014491
    Abstract: A fuel cell comprises a proton conductive membrane, an anode catalyst layer provided on one surface of the proton conductive membrane, and a cathode catalyst layer provided partly on another surface of the proton conductive membrane, wherein water generated in the cathode catalyst layer is supplied to the anode catalyst layer through the proton conductive membrane, and the fuel cell further comprises a water-diffusing portion which is provided on the another surface of the proton conductive membrane and is in contact with the cathode catalyst layer.
    Type: Application
    Filed: September 20, 2007
    Publication date: January 17, 2008
    Inventors: Akira Yajima, Yumiko Takizawa, Asako Satoh, Hirofumi Kan
  • Publication number: 20070287058
    Abstract: A fuel cell comprising a cathode catalyst layer, an anode catalyst layer including a conductive perfluoro-binder having a micellar structure formed by outwardly orienting hydrophilic groups and inwardly orienting hydrophobic (lipophilic) groups, and a proton conductive membrane provided between the cathode catalyst layer and the anode catalyst layer.
    Type: Application
    Filed: August 10, 2007
    Publication date: December 13, 2007
    Inventors: Hirofumi KAN, Asako Satoh, Akira Yajima, Yumiko Takizawa, Hiroyuki Shiroki
  • Patent number: 7261972
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode group having a positive electrode and a negative electrode wound flatly by way of an interposed separator, a positive electrode tab electrically connected to the positive electrode, and projecting from a spiral winding surface of the electrode group, a negative electrode tab electrically connected to the negative electrode, and projecting from the spiral winding surface, and a nonaqueous electrolyte, wherein the nonaqueous solvent contains sultone compound including a ring having at least one double bond, and a distance between the positive electrode tab and the negative electrode tab is 6 mm to 18 mm.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: August 28, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shusuke Inada, Masahiro Sekino, Akira Yajima, Nao Shimura, Masayuki Oguchi, Asako Satoh, Hiroshi Kitayama
  • Publication number: 20060131365
    Abstract: Realization of the projection electrode formation with a narrow pad pitch is planned. In preparing a semiconductor wafer, by forming a polyimide film, which does not cover each of a plurality of lands, between the respective lands which adjoin each other among the plurality of lands on the main surface of the semiconductor wafer, applying a soldering paste material with the printing method via the mask for printing on each of a plurality of lands after polyimide film formation, and forming a solder bump by performing heat curing of the soldering paste material after removing the mask for printing, a solder bump can be formed without generating a electric short circuit between bumps even in the case of a narrow pad pitch.
    Type: Application
    Filed: December 15, 2005
    Publication date: June 22, 2006
    Inventors: Hiromi Shigihara, Hisao Shigihara, Akira Yajima
  • Patent number: 7057283
    Abstract: A semiconductor apparatus in which flip chip bonding is enabled without any underfill, and which comprises a semiconductor device, an electrically insulating layer formed on the semiconductor device by mask-printing an electrically insulating material containing particles, and an external connection terminal formed on the electrically insulating layer and electrically connected with an electrode of the semiconductor device. The electrically insulating layer is formed with a thickness so as to provide ?-ray shielding of the semiconductor device.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 6, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kosuke Inoue, Hiroyuki Tenmei, Yoshihide Yamaguchi, Noriyuki Oroku, Hiroshi Hozoji, Shigeharu Tsunoda, Madoka Minagawa, Naoya Kanda, Ichiro Anjo, Asao Nishimura, Akira Yajima, Kenji Ujiie
  • Publication number: 20060051669
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.
    Type: Application
    Filed: October 7, 2005
    Publication date: March 9, 2006
    Inventors: Hirotaka Hayashida, Akira Yajima
  • Patent number: 6930388
    Abstract: A semiconductor device is provided which enables a flip chip connection without use of underfill. The semiconductor device includes a semiconductor element having circuit electrodes and a circuit surface coated with a protecting film. A stress relaxation layer is provided by coating a cured thermoplastic resin onto the protecting film of the circuit surface in a manner which leaves the circuit electrodes exposed and curing it and having an inclination in the edge portion thereof. A wiring layer with wirings is connected to each of the circuit electrodes and disposed so as to make an electrical connection from the circuit electrodes, via the edge portion of the stress relaxation layer, and to a desired portion on the surface of the stress relaxation layer. A protecting film is provided thereon, and an external connection terminal is also provided.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: August 16, 2005
    Assignee: Renesas Technology Corp.
    Inventors: Yoshihide Yamaguchi, Hiroyuki Tenmei, Kosuke Inoue, Noriyuki Oroku, Hiroshi Hozoji, Shigeharu Tsunoda, Naoya Kanda, Madoka Minagawa, Ichiro Anjo, Asao Nishimura, Kenji Ujiie, Akira Yajima
  • Patent number: 6929885
    Abstract: A non-aqueous secondary battery having an electrode group and a non-aqueous electrolytic solution, characterized in that: (1) the electrode group is contained in a casing made of a sheet having a resin layer with a thickness of 0.5 mm or less, (2) the non-aqueous solvent contains ?-butyrolactone, ethylene carbonate, at least one vinylene carbonate compound and at least one vinylethylene carbonate compound, (3) the amounts of the vinylene carbonate compound, the vinylethylene carbonate compound and sum total of both are, respectively, 0.01 to 5% by weight, 0.01 to 5% by weight and 0.02 to 6% by weight, based on the total weight of the non-aqueous solvent, and (4) the amounts of the ?-butyrolactone and the ethylene carbonate are, respectively, 50% by volume or more and 10% by volume or more, based on the total volume of the non-aqueous solvent.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: August 16, 2005
    Assignees: Mitsubishi Chemical Corporation, A&T Battery Corporation
    Inventors: Minoru Kotato, Hitoshi Suzuki, Takahiro Yamamoto, Akira Yajima
  • Publication number: 20050130035
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode group having a positive electrode and a negative electrode wound flatly by way of an interposed separator, a positive electrode tab electrically connected to the positive electrode, and projecting from a spiral winding surface of the electrode group, a negative electrode tab electrically connected to the negative electrode, and projecting from the spiral winding surface, and a nonaqueous electrolyte, wherein the nonaqueous solvent contains sultone compound including a ring having at least one double bond, and a distance between the positive electrode tab and the negative electrode tab is 6 mm to 18 mm.
    Type: Application
    Filed: January 25, 2005
    Publication date: June 16, 2005
    Inventors: Shusuke Inada, Masahiro Sekino, Akira Yajima, Nao Shimura, Masayuki Oguchi, Asako Satoh, Hiroshi Kitayama
  • Publication number: 20050053833
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.
    Type: Application
    Filed: October 12, 2004
    Publication date: March 10, 2005
    Inventors: Hirotaka Hayashida, Akira Yajima
  • Patent number: 6861344
    Abstract: The corrosion of a pad portion on TEG is prevented, and the wettability of a solder and the shear strength after solder formation of a pad portion of an actual device are improved. A third layer wiring M3 on a chip area CA of a semiconductor wafer and a third layer wiring M3 on a scribe area SA are respectively comprised of a TiN film M3a, an Al alloy film M3b, and a TiN film M3c. A second pad portion PAD2 as the top of a rewiring 49 on the chip area CA is cleaned. Alternatively, an Au film 53a is formed thereon by an electroles splating method. Further, after the formation of the Au film 53a, a retention test is carried out. Thereafter, further, an Au film 53b is formed and a solder bump electrode 55 is formed. As a result, it is possible to prevent the corrosion of a first pad portion PAD1 of the third layer wiring M3 on the scribe area SA which is TEG due to a plating solution or the like by the TiN film M3c.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: March 1, 2005
    Assignee: Renesas Technology Corporation
    Inventors: Akira Yajima, Kenichi Yamamoto, Hiromi Abe
  • Patent number: 6822317
    Abstract: A semiconductor apparatus comprising a semiconductor device, an electrically insulating layer formed on the semiconductor device, and an external connection terminal formed on the electrically insulating layer and electrically connected to an electrode of the semiconductor device, wherein a power/ground line and a signal line in a region of from an edge of the electrically insulating layer to a uniform-thickness flat portion of the electrically insulating layer are different in kind of wiring pattern from each other.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: November 23, 2004
    Assignee: Renesas Technology Corporation
    Inventors: Kosuke Inoue, Hiroyuki Tenmei, Yoshihide Yamaguchi, Noriyuki Oroku, Hiroshi Hozoji, Shigeharu Tsunoda, Madoka Minagawa, Naoya Kanda, Ichiro Anjo, Asao Nishimura, Akira Yajima, Kenji Ujiie
  • Publication number: 20040195687
    Abstract: A semiconductor apparatus in which flip chip bonding is enabled without any underfill, and which comprises a semiconductor device, an electrically insulating layer formed on the semiconductor device by mask-printing an electrically insulating material containing particles, and an external connection terminal formed on the electrically insulating layer and electrically connected with an electrode of the semiconductor device. The electrically insulating layer is formed with a thickness so as to provide &agr;-ray shielding of the semiconductor device.
    Type: Application
    Filed: April 16, 2004
    Publication date: October 7, 2004
    Inventors: Kosuke Inoue, Hiroyuki Tenmei, Yoshihide Yamaguchi, Noriyuki Oroku, Hiroshi Hozoji, Shigeharu Tsunoda, Madoka Minagawa, Naoya Kanda, Ichiro Anjo, Asao Nishimura, Akira Yajima, Kenji Ujiie
  • Patent number: 6770547
    Abstract: A semiconductor apparatus in which flip chip bonding is enabled without any underfill, and which comprises a semiconductor device, an electrically insulating layer formed on the semiconductor device by mask-printing an electrically insulating material containing particles, and an external connection terminal formed on the electrically insulating layer and electrically connected with an electrode of the semiconductor device.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: August 3, 2004
    Assignee: Renesas Technology Corporation
    Inventors: Kosuke Inoue, Hiroyuki Tenmei, Yoshihide Yamaguchi, Noriyuki Oroku, Hiroshi Hozoji, Shigeharu Tsunoda, Madoka Minagawa, Naoya Kanda, Ichiro Anjo, Asao Nishimura, Akira Yajima, Kenji Ujiie
  • Publication number: 20040101763
    Abstract: A non-aqueous secondary battery having an electrode group and a non-aqueous electrolytic solution, characterized in that :(1) the electrode group is contained in a casing made of a sheet having a resin layer with a thickness of 0.5 mm or less, (2) the non-aqueous solvent contains &ggr;-butyrolactone, ethylene carbonate, at least one vinylene carbonate compound and at least one vinylethylene carbonate compound, (3) the amounts of the vinylene carbonate compound, the vinylethylene carbonate compound and sum total of both are, respectively, 0.01 to 5% by weight, 0.01 to 5% by weight and 0.02 to 6% by weight, based on the total weight of the non-aqueous solvent, and (4) the amounts of the &ggr;-butyrolactone and the ethylene carbonate are, respectively, 50% by volume or more and 10% by volume or more, based on the total volume of the non-aqueous solvent.
    Type: Application
    Filed: November 24, 2003
    Publication date: May 27, 2004
    Applicants: MITSUBISHI CHEMICAL CORPORATION, A&T Battery Corporation
    Inventors: Minoru Kotato, Hitoshi Suzuki, Takahiro Yamamoto, Akira Yajima