Patents by Inventor Takuto Yamaguchi

Takuto Yamaguchi 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: 20220365841
    Abstract: A probability calculation result database includes a combination countermeasure table having an error code group including an error code of a repair target apparatus and a plurality error code indicating the relevant error code appeared in the past, as well as a countermeasure content against the error code and the plurality error code, and probabilities that the countermeasure content against both the error code and the plurality error code are taken respectively; a data processing unit which generates a combination table containing a new error code and a new plurality error code from apparatus error information obtained from the repair target apparatus, and repair prediction processing for predicting recommendable countermeasure contents against the new error code and plurality error code on the basis of the combination table and the probability calculation result database; and a result processing unit for providing the results of the repair prediction processing in order.
    Type: Application
    Filed: March 19, 2020
    Publication date: November 17, 2022
    Applicant: Hitachi, Ltd.
    Inventors: Takuto YAMAGUCHI, Sho MIZUNO, Kenji SUGIYAMA
  • Patent number: 10481023
    Abstract: A mechanical quantity measuring device includes: a sensor chip having a strain detector formed on a surface of a semiconductor substrate and a plurality of electrodes connected to the strain detector; a stem having ascot that protrudes from an adjacent peripheral portion and has an upper surface that is attached to a lower surface of the sensor chip by a bonding material formed from a metallic material or a glass material; a lead-out wiring part including a plurality of wires that are electrically connected to the plurality of electrodes; and a fixing part for fixing the stem, wherein: the stem and the fixing part are integrally molded or fixed through metallic bonding or mechanical bonding.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: November 19, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hanae Shimokawa, Hiroyuki Oota, Atsushi Kazama, Shohei Hata, Takuto Yamaguchi, Atsuo Soma, Kisho Ashida, Junji Onozuka, Kentarou Miyajima, Masayuki Hio
  • Publication number: 20170108390
    Abstract: A mechanical quantity measuring device includes: a sensor chip having a strain detector formed on a surface of a semiconductor substrate and a plurality of electrodes connected to the strain detector; a stem having ascot that protrudes from an adjacent peripheral portion and has an upper surface that is attached to a lower surface of the sensor chip by a bonding material formed from a metallic material or a glass material; a lead-out wiring part including a plurality of wires that are electrically connected to the plurality of electrodes; and a fixing part for fixing the stem, wherein: the stem and the fixing part are integrally molded or fixed through metallic bonding or mechanical bonding.
    Type: Application
    Filed: January 26, 2015
    Publication date: April 20, 2017
    Inventors: Hanae SHIMOKAWA, Hiroyuki OOTA, Atsushi KAZAMA, Shohei HATA, Takuto YAMAGUCHI, Atsuo SOMA, Kisho ASHIDA, Junji ONOZUKA, Kentarou MIYAJIMA, Masayuki HIO
  • Patent number: 9393645
    Abstract: The disclosed junction material, manufacturing method thereof, and manufacturing method of junction structure utilize lead-free materials and ensure a high reliability of the junction between a semiconductor element and a frame or substrate, or, between a metal plate and another metal plate. For junctions between a semiconductor element and a frame or substrate, by using as the JUNCTION MATERIAL a laminate material comprising a Zn-based metallic layer (101), Al-based metallic layers (102a, 102b) on both sides thereof, and X-based metallic layers (103a, 103b) (X=Cu, Au, Ag or Sn) on the outside of both the Al-based metallic layers (102a, 102b), even in an oxygen-rich environment, the superficial X-based metallic layers protect the Zn and Al from oxidation until said junction material melts, preserving the wettability and bondability of said junction material as solder and securing the high reliability of the junction.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: July 19, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventors: Takuto Yamaguchi, Masahide Okamoto, Osamu Ikeda, Hiromitsu Kuroda, Kazuma Kuroki, Shohei Hata, Yuichi Oda
  • Patent number: 9184115
    Abstract: The purpose of the present invention is to increase the reliability of a semiconductor device in which a semiconductor element and a substrate are connected by solder and which is molded by resin. Solder containing easily volatized metals (Zn, Mg, Sb) is used for a solder material 106, and after a semiconductor element 104 is connected to a lead frame 102 and wire bonding is carried out, vacuum heat treatment is applied, the easily volatized metals in the solder are volatized to adhere to a substrate surface, and an alloy 103 with the lead frame is formed, thereby roughening the substrate surface and improving the adhesive strength of a sealing resin 101 and the substrate.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: November 10, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Takuto Yamaguchi, Osamu Ikeda
  • Patent number: 9178294
    Abstract: An electronic device having a press-fit connection for connecting a connector and an electronic part mounted on a printed circuit board which is possible to enable high density mounting. Viewing the printed circuit board from an upper surface, between adjacent through holes on which a compressive force acts upon insertion of the press-fit terminal, among the large number of through holes, a land or a conductor film connected to the conductor film formed on the inner wall surface of the through hole or the conductor film not connected to the conductor film formed on the inner wall surface of the through hole, formed in the circuit board held between the top layer circuit board and the bottom layer circuit board, exists in a width equal to or wider than the diameter of the through hole.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: November 3, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Takuto Yamaguchi
  • Publication number: 20140327121
    Abstract: The purpose of the present invention is to increase the reliability of a semiconductor device in which a semiconductor element and a substrate are connected by solder and which is molded by resin. Solder containing easily volatized metals (Zn, Mg, Sb) is used for a solder material 106, and after a semiconductor element 104 is connected to a lead frame 102 and wire bonding is carried out, vacuum heat treatment is applied, the easily volatized metals in the solder are volatized to adhere to a substrate surface, and an alloy 103 with the lead frame is formed, thereby roughening the substrate surface and improving the adhesive strength of a sealing resin 101 and the substrate.
    Type: Application
    Filed: November 7, 2012
    Publication date: November 6, 2014
    Inventors: Takuto Yamaguchi, Osamu Ikeda
  • Publication number: 20130256390
    Abstract: The disclosed junction material, manufacturing method thereof, and manufacturing method of junction structure utilize lead-free materials and ensure a high reliability of the junction between a semiconductor element and a frame or substrate, or, between a metal plate and another metal plate. For junctions between a semiconductor element and a frame or substrate, by using as the JUNCTION MATERIAL a laminate material comprising a Zn-based metallic layer (101), Al-based metallic layers (102a, 102b) on both sides thereof, and X-based metallic layers (103a, 103b) (X=Cu, Au, Ag or Sn) on the outside of both the Al-based metallic layers (102a, 102b), even in an oxygen-rich environment, the superficial X-based metallic layers protect the Zn and Al from oxidation until said junction material melts, preserving the wettability and bondability of said junction material as solder and securing the high reliability of the junction.
    Type: Application
    Filed: July 28, 2011
    Publication date: October 3, 2013
    Applicant: Hitachi Cable, Ltd.
    Inventors: Takuto Yamaguchi, Masahide Okamoto, Osamu Ikeda, Hiromitsu Kuroda, Kazuma Kuroki, Shohei Hata, Yuichi Oda
  • Publication number: 20110058342
    Abstract: An object of the present invention is to provide a semiconductor device having a small-sized, thin, and high heat-dissipating multilayer frame mounting structure. To achieve the object, the invention provides a semiconductor device having a multilayer frame obtained by stacking a plurality of lead frames on which electronic parts are mounted and sealing the stack with a resin. An interlayer distance between a lead frame on which an electronic part is mounted and a lead frame which is stacked above the lead frame and on which an electronic part is mounted is shorter than a distance from a face of the lead frame to a top face of the electronic part.
    Type: Application
    Filed: August 25, 2010
    Publication date: March 10, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Shinya Kawakita, Shiro Yamashita, Ukyo Ikeda, Takuto Yamaguchi