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).
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Publication number: 20220365841Abstract: 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: ApplicationFiled: March 19, 2020Publication date: November 17, 2022Applicant: Hitachi, Ltd.Inventors: Takuto YAMAGUCHI, Sho MIZUNO, Kenji SUGIYAMA
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Patent number: 10481023Abstract: 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: GrantFiled: January 26, 2015Date of Patent: November 19, 2019Assignee: 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
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Publication number: 20170108390Abstract: 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: ApplicationFiled: January 26, 2015Publication date: April 20, 2017Inventors: Hanae SHIMOKAWA, Hiroyuki OOTA, Atsushi KAZAMA, Shohei HATA, Takuto YAMAGUCHI, Atsuo SOMA, Kisho ASHIDA, Junji ONOZUKA, Kentarou MIYAJIMA, Masayuki HIO
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Patent number: 9393645Abstract: 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: GrantFiled: July 28, 2011Date of Patent: July 19, 2016Assignee: Hitachi Metals, Ltd.Inventors: Takuto Yamaguchi, Masahide Okamoto, Osamu Ikeda, Hiromitsu Kuroda, Kazuma Kuroki, Shohei Hata, Yuichi Oda
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Patent number: 9184115Abstract: 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: GrantFiled: November 7, 2012Date of Patent: November 10, 2015Assignee: Hitachi, Ltd.Inventors: Takuto Yamaguchi, Osamu Ikeda
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Patent number: 9178294Abstract: 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: GrantFiled: October 18, 2012Date of Patent: November 3, 2015Assignee: Hitachi Automotive Systems, Ltd.Inventor: Takuto Yamaguchi
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Publication number: 20140327121Abstract: 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: ApplicationFiled: November 7, 2012Publication date: November 6, 2014Inventors: Takuto Yamaguchi, Osamu Ikeda
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Publication number: 20130256390Abstract: 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: ApplicationFiled: July 28, 2011Publication date: October 3, 2013Applicant: Hitachi Cable, Ltd.Inventors: Takuto Yamaguchi, Masahide Okamoto, Osamu Ikeda, Hiromitsu Kuroda, Kazuma Kuroki, Shohei Hata, Yuichi Oda
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Publication number: 20110058342Abstract: 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: ApplicationFiled: August 25, 2010Publication date: March 10, 2011Applicant: Hitachi, Ltd.Inventors: Shinya Kawakita, Shiro Yamashita, Ukyo Ikeda, Takuto Yamaguchi