Patents by Inventor Yoshikazu Takahashi

Yoshikazu Takahashi 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: 20150340297
    Abstract: A power semiconductor module is equipped with: a frame made of an insulator; a first electrode plate made of a metal and fixed to a bottom opening of the frame; semiconductor chips electrically and physically connected to the first electrode plate; a multilayer substrate fixed to a principal surface of the first electrode plate; wiring members that electrically connect front surface electrodes of the semiconductor chips and a circuit plate of the multilayer substrate; a second electrode plate fixed to a top opening of the frame; and a metal block that has a first surface having a projected portion and a second surface disposed on a side opposite to the first surface and that is tapered from the first surface to the second surface, the projected portion being electrically and physically connected to the circuit plate of the multilayer substrate and the second surface being electrically and physically connected to the second electrode plate.
    Type: Application
    Filed: April 24, 2015
    Publication date: November 26, 2015
    Applicant: Fuji Electric Co., Ltd.
    Inventors: Motohito HORI, Yoshikazu TAKAHASHI, Yoshinari IKEDA
  • Publication number: 20150195292
    Abstract: A data processing device, that includes: a first storage device; and a processor configured to execute a procedure. The procedure includes: receiving write data to be written to a second storage device provided at a computer, outputting the write data to the second storage device, and duplicating and outputting the write data; executing control that writes the duplicated write data to the first storage device that is separate from the second storage device; executing virus countermeasure processing related to virus infection, on the write data stored in the first storage device; and in a case where the write data is output while executing the virus countermeasure processing, suspending the virus countermeasure processing and prioritizing execution of the control that writes the duplicated write data to the first storage device.
    Type: Application
    Filed: March 24, 2015
    Publication date: July 9, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Tomohiro MIURA, SYOUICHI KAMIO, Satoru Fukuda, Kaoru IGUCHI, YOSHIKAZU TAKAHASHI
  • Patent number: 9035453
    Abstract: A semiconductor device that improves the heat cycle resistance and power cycle resistance of a power module. An electrode member in which copper posts are formed in a plurality of perforations cut in a support made of a ceramic material is soldered onto a side of an IGBT where an emitter electrode is formed. By soldering the copper posts onto the electrode, heat generated in the IGBT is transferred to the electrode member and is radiated. In addition, even if a material of which the IGBT is made and copper differ in thermal expansivity, stress on a soldered interface is reduced and distortion is reduced. This suppresses the appearance of a crack. As a result, the heat cycle resistance and power cycle resistance of a power module can be improved.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 19, 2015
    Assignees: OCTEC, INC., FUJI ELECTRIC CO., LTD., KYOCERA CORPORATION
    Inventors: Katsuya Okumura, Yoshikazu Takahashi, Kazunori Takenouchi
  • Publication number: 20150109738
    Abstract: A semiconductor device has a single unit capable of improving adhesion to a cooling body and a heat dissipation performance, and an aggregate of the single units is capable of configuring any circuit at a low cost. A single unit includes copper blocks, an insulating substrate with a conductive pattern, an IGBT chip, a diode chip, a collector terminal pin, implant pins fixed to the chips by solder, a printed circuit board having the implant pins fixed thereto, an emitter terminal pin, a control terminal pin, a collector terminal pin, and a resin case having the above-mentioned components sealed therein. The copper blocks make it possible to improve adhesion to a cooling body and the heat dissipation performance. A plurality of single units can be combined with an inter-unit wiring board to form any circuit.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 23, 2015
    Inventors: Takafumi YAMADA, Tetsuya INABA, Yoshinari IKEDA, Katsuhiko YANAGAWA, Yoshikazu TAKAHASHI
  • Patent number: 8984634
    Abstract: A quarantine network system 100 quarantines terminals 30 and 31 connected to a network via a wireless communication. The quarantine network system 100 is provided with an access point 20 for a business NW used for connection to a business network, an access point 21 for a quarantine NW which is used for connection to a network for quarantining and restricts the number of terminals connectable thereto, and an NW switching performance server 10 transmitting to the terminal a command which makes the terminal switch SSID of an access point which the terminal uses for wireless communication, in accordance with the situation.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 17, 2015
    Assignee: NEC Corporation
    Inventor: Yoshikazu Takahashi
  • Publication number: 20150035912
    Abstract: A piezoelectric actuator is provided, including a vibration plate, a piezoelectric layer, a plurality of individual electrodes arranged in two arrays, first and second common electrodes which have first and second facing portions facing parts of the individual electrodes and first and second connecting portions connecting the first and second facing portions respectively, and first and second wiring portions which are arranged on the vibration plate and which are connected to the first and second common electrodes respectively via first and second connecting wirings, wherein one of the first connecting wirings connects the first connecting portion and one of the first wiring portion while striding over the second connecting portion.
    Type: Application
    Filed: August 13, 2014
    Publication date: February 5, 2015
    Inventor: Yoshikazu TAKAHASHI
  • Publication number: 20150005249
    Abstract: A readthrough inducing agent for inducing readthrough of a premature stop codon generated by nonsense mutations, the readthrough inducing agent comprising a compound having a structure expressed by the following Structural Formula (A), and a drug for treating a genetic disease caused by nonsense mutations, the drug comprising the readthrough inducing agent.
    Type: Application
    Filed: September 15, 2014
    Publication date: January 1, 2015
    Inventors: Ryoichi Matsuda, Masataka Shiozuka, Akira Wagatsuma, Yoshikazu Takahashi, Daishiro Ikeda, Yoshiaki Nonomura, Masafumi Matsuo, Atsushi Nishida
  • Patent number: 8907477
    Abstract: A semiconductor device has a single unit capable of improving adhesion to a cooling body and a heat dissipation performance, and an aggregate of the single units is capable of configuring any circuit at a low cost. A single unit (101) includes copper blocks (1, 8), an insulating substrate (6) with a conductive pattern, an IGBT chip (10), a diode chip (13), a collector terminal pin (15), implant pins (17) fixed to the chips (10) by solder (11), a printed circuit board (16) having the implant pins (17) fixed thereto, an emitter terminal pin (19), a control terminal pin (20), a collector terminal pin (15), and a resin case (21) having the above-mentioned components sealed therein. The copper blocks (1, 8) make it possible to improve adhesion to a cooling body and the heat dissipation performance. A plurality of single units (101) can be combined with an inter-unit wiring board to form any circuit.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: December 9, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Takafumi Yamada, Tetsuya Inaba, Yoshinari Ikeda, Katsuhiko Yanagawa, Yoshikazu Takahashi
  • Publication number: 20140351207
    Abstract: The content recommendation system includes a user attribute information acquisition means for acquiring attribute information of a given user, a list acquisition means for acquiring at least one list from among lists of content sequentially generated over time on the basis of the attribute information of the given user acquired by the user attribute information acquisition means, a user preference information acquisition means for acquiring user preference information, which is feature information of content preferred by the given user, a content extraction means for extracting some content from content included in the list acquired by the list acquisition means on the basis of the user preference information acquired by the user preference information acquisition means, and a content presentation means for presenting the content extracted by the content extraction means to the given user.
    Type: Application
    Filed: August 13, 2014
    Publication date: November 27, 2014
    Inventors: Katsu Saito, Masaaki Isozaki, Wataru Onogi, Kazuo Ishii, Nozomu Ikeda, Yoshikazu Takahashi
  • Patent number: 8833910
    Abstract: A piezoelectric actuator is provided, including a vibration plate, a piezoelectric layer, a plurality of individual electrodes arranged in two arrays, first and second common electrodes which have first and second facing portions facing parts of the individual electrodes and first and second connecting portions connecting the first and second facing portions respectively, and first and second wiring portions which are arranged on the vibration plate and which are connected to the first and second common electrodes respectively via first and second connecting wirings, wherein one of the first connecting wirings connects the first connecting portion and one of the first wiring portion while striding over the second connecting portion.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: September 16, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Yoshikazu Takahashi
  • Patent number: 8838641
    Abstract: The content recommendation system includes a user attribute information acquisition means for acquiring attribute information of a given user, a list acquisition means for acquiring at least one list from among lists of content sequentially generated over time on the basis of the attribute information of the given user acquired by the user attribute information acquisition means, a user preference information acquisition means for acquiring user preference information, which is feature information of content preferred by the given user, a content extraction means for extracting some content from content included in the list acquired by the list acquisition means on the basis of the user preference information acquired by the user preference information acquisition means, and a content presentation means for presenting the content extracted by the content extraction means to the given user.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: September 16, 2014
    Assignee: Sony Corporation
    Inventors: Katsu Saito, Masaaki Isozaki, Wataru Onogi, Kazuo Ishii, Nozomu Ikeda, Yoshikazu Takahashi
  • Patent number: 8732817
    Abstract: A switching hub, system and method for restricting a communication between terminals within a second network isolated form a first network. The terminals are connected to the first network or the second network, wherein a terminal with sufficient security level is connected to the first network and a terminal with insufficient security level is connected to the second network. And a communication between the terminals within the second network is restricted.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: May 20, 2014
    Assignee: NEC Corporation
    Inventor: Yoshikazu Takahashi
  • Patent number: 8712773
    Abstract: The present invention relates to a method for modeling a common-language speech recognition, by a computer, under the influence of multiple dialects and concerns a technical field of speech recognition by a computer. In this method, a triphone standard common-language model is first generated based on training data of standard common language, and first and second monophone dialectal-accented common-language models are based on development data of dialectal-accented common languages of first kind and second kind, respectively. Then a temporary merged model is obtained in a manner that the first dialectal-accented common-language model is merged into the standard common-language model according to a first confusion matrix obtained by recognizing the development data of first dialectal-accented common language using the standard common-language model.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: April 29, 2014
    Assignees: Sony Computer Entertainment Inc., Tsinghua University
    Inventors: Fang Zheng, Xi Xiao, Linquan Liu, Zhan You, Wenxiao Cao, Makoto Akabane, Ruxin Chen, Yoshikazu Takahashi
  • Publication number: 20140080262
    Abstract: A method for producing a semiconductor device includes solder-connecting a semiconductor chip, onto an insulating substrate including a ceramic board and having conductor layers on two surfaces thereof, with a lead-free solder; warping a radiating base such that a surface of the radiating base on a side opposite to the insulating substrate is convex; and solder-connecting the insulating substrate onto the warped radiating base with the lead-free solder so as to provide a substantially flat solder-connected radiating base.
    Type: Application
    Filed: September 3, 2013
    Publication date: March 20, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Yoshitaka NISHIMURA, Akira MOROZUMI, Kazunaga OHNISHI, Eiji MOCHIZUKI, Yoshikazu TAKAHASHI
  • Patent number: 8673691
    Abstract: A method for manufacturing a semiconductor device has a step of forming a first substrate; a step of facing a first main electrode to the first metal foil, and electrically connecting the first main electrode and the first metal foil; a step of facing a second main electrode to the second metal foil, and electrically connecting the second main electrode and the second metal foil; a step of forming a second substrate; and steps of facing a surface side of the second substrate to a surface side of the first substrate; electrically connecting the third metal foil and a third main electrode provided on a main surface of the first semiconductor element; and electrically connecting the fourth metal foil and a fourth main electrode provided on a main surface of the second semiconductor element.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: March 18, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yoshinari Ikeda, Shin Soyano, Akira Morozumi, Kenji Suzuki, Yoshikazu Takahashi
  • Patent number: 8565991
    Abstract: A working fluid medium temperature control system comprises an actuator operable on a working fluid medium, a pump for the working fluid medium, a fluid passage structure for the working fluid medium, an electric motor drivingly connected to the pump, and a control unit for the electric motor, the control unit including an inverter and an inverter controller. The inverter and the electric motor are integrated in such a way that the inverter is in heat transfer communication with the electric motor. The fluid passage structure is in heat transfer communication with the inverter.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: October 22, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takayuki Bitou, Koh Uchida, Katsuhiro Suda, Taisuke Ueda, Toru Inoue, Yoshikazu Takahashi, Hideyuki Kita, Yohei Koike, Nariaki Tazawa
  • Publication number: 20130267064
    Abstract: A method for manufacturing a semiconductor device has a step of forming a first substrate; a step of facing a first main electrode to the first metal foil, and electrically connecting the first main electrode and the first metal foil; a step of facing a second main electrode to the second metal foil, and electrically connecting the second main electrode and the second metal foil; a step of forming a second substrate; and steps of facing a surface side of the second substrate to a surface side of the first substrate; electrically connecting the third metal foil and a third main electrode provided on a main surface of the first semiconductor element; and electrically connecting the fourth metal foil and a fourth main electrode provided on a main surface of the second semiconductor element.
    Type: Application
    Filed: April 22, 2013
    Publication date: October 10, 2013
    Applicant: FUJI ELECTRIC CO., LTD
    Inventors: Yoshinari IKEDA, Shin SOYANO, Akira MOROZUMI, Kenji SUZUKI, Yoshikazu TAKAHASHI
  • Patent number: 8450845
    Abstract: The object of the present invention is to efficiently dissipate heat from the upper and lower main surfaces of a semiconductor device carrying a semiconductor element. A semiconductor device (1) is provided with an insulating substrate (10A), an insulating substrate (10B) provided so as to face the insulating substrate (10A), and a semiconductor element (20) disposed between the insulating substrate (10A) and the insulating substrate (10B) and having a collector electrode and an emitter electrode provided on the side opposite to that of the collector electrode. The collector electrode is electrically connected to a metal foil (10ac) provided on the insulating substrate (10A), and the emitter electrode is electrically connected to the metal foil (10bc) provided on the insulating substrate (10B). As a result, heat generated by the semiconductor element (20) is efficiently dissipated from the upper and lower main surfaces of the semiconductor device (1).
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: May 28, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yoshinari Ikeda, Shin Soyano, Akira Morozumi, Kenji Suzuki, Yoshikazu Takahashi
  • Publication number: 20130081139
    Abstract: A quarantine network system 100 quarantines terminals 30 and 31 connected to a network via a wireless communication. The quarantine network system 100 is provided with an access point 20 for a business NW used for connection to a business network, an access point 21 for a quarantine NW which is used for connection to a network for quarantining and restricts the number of terminals connectable thereto, and an NW switching performance server 10 transmitting to the terminal a command which makes the terminal switch SSID of an access point which the terminal uses for wireless communication, in accordance with the situation.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 28, 2013
    Applicant: NEC Corporation
    Inventor: Yoshikazu TAKAHASHI
  • Patent number: 8383547
    Abstract: The present invention relates to provide an aflatoxin production inhibitor that inhibits aflatoxin production specifically and efficiently, is highly safe, and is practical, and an efficient production method thereof; and a method for controlling aflatoxin contamination that uses the aflatoxin production inhibitor, specifically relating to an aflatoxin production inhibitor that includes at least one of a dioctatin represented by the following formula (I) and a derivative thereof, as an active ingredient: where, in the formula (I), R represents one of hydrogen and a methyl group.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: February 26, 2013
    Assignees: Microbial Chemistry Research Foundation, The University of Tokyo
    Inventors: Shohei Sakuda, Keita Nakamura, Tetsuo Akiyama, Yoshikazu Takahashi, Yasuhiko Muraoka, Ikuko Kurata