Patents by Inventor Tadashi Sakai

Tadashi Sakai 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: 20180269157
    Abstract: A wiring of an embodiment includes: a multilayer graphene including graphene sheets laminated in a first direction, the multilayer graphene extended in a second direction regarded as a longitudinal direction that intersects with the first direction; a first metal part in direct contact with the multilayer graphene; a second metal part spaced apart from the first metal part in the second direction, the second metal part in direct contact with the multilayer graphene; a first conductive part disposed on the multilayer graphene in the first direction, and electrically connected to the multilayer graphene with the first metal part interposed therebetween; and a second conductive part disposed on the multilayer graphene in the first direction, and electrically connected to the multilayer graphene with the second metal part interposed therebetween.
    Type: Application
    Filed: September 1, 2017
    Publication date: September 20, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masayuki KATAGIRI, Tatsuro SAITO, Tadashi SAKAI, Hisao MIYAZAKI
  • Patent number: 10079282
    Abstract: A semiconductor device according to an embodiment includes an i-type or a p-type first diamond semiconductor layer, an n-type second diamond semiconductor layer provided on the first diamond semiconductor layer, a mesa structure and an n-type first diamond semiconductor region provided on the side surface. The mesa structure includes the first diamond semiconductor layer, the second diamond semiconductor layer, a top surface with a plane orientation of ±10 degrees or less from a {100} plane, and a side surface inclined by 20 to 90 degrees with respect to a direction of <011>±20 degrees from the {100} plane. The first diamond semiconductor region is in contact with the second diamond semiconductor layer and has an n-type impurity concentration lower than an n-type impurity concentration of the second diamond semiconductor layer.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: September 18, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mariko Suzuki, Tadashi Sakai, Chiharu Ota, Kazuto Takao, Takashi Shinohe
  • Publication number: 20180180409
    Abstract: An estimating device includes: a movement amount computing section that, on the basis of a position of a predetermined region within an image picked-up at a first time, and a position of a region that corresponds to the predetermined region and is within an image picked-up in a same direction at a second time that is after the first time, computing a movement amount of the predetermined region in a vertical direction; a movement amount integrating section that computes an integrated value of the movement amounts, each time the movement amount is computed; a correcting section that corrects the integrated value of a current point in time on the basis of time series data of the integrated values of the movement amounts within a past predetermined time period; and an estimating section that estimates a pitch angle of the vehicle on the basis of a corrected integrated value.
    Type: Application
    Filed: June 24, 2016
    Publication date: June 28, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Akihiro WATANABE, Yusuke KATAOKA, Tadashi SAKAI, Naoki KAWASAKI
  • Patent number: 9997611
    Abstract: A graphene wiring structure of an embodiment has a multilayered graphene having a plurality of planar graphene sheets laminated, and a first interlayer substance being a metal oxyhalide between the plurality of planar graphene sheets.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: June 12, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisao Miyazaki, Tadashi Sakai, Masayuki Katagiri, Yuichi Yamazaki
  • Patent number: 9990549
    Abstract: A complex marking determining device includes a brightness state calculating portion configured to calculate a lane marking representative value indicative of a brightness state of a plurality of pixels that make up a lane marking display region, and calculate a road surface representative value indicative of a brightness state of a plurality of pixels that make up the road surface display region; and a complex marking determining portion configured to determine that the lane marking is a complex marking at least when a degree of deviation between the lane marking representative value and the road surface representative value is equal to or greater than a first threshold value.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: June 5, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Yusuke Kataoka, Naoki Kawasaki, Tadashi Sakai, Akihiro Watanabe
  • Patent number: 9924593
    Abstract: A graphene wiring structure of an embodiment has a substrate, a metal part on the substrate, multilayered graphene connected to the metal part, a first insulative film on the substrate, and a second insulative film on the substrate. The metal part is present between the first insulative film and the second insulative film. Edges of the multilayered graphene are connected to the metal part. A side face of the first insulative film vertical to the substrate opposes a side face of the second insulative film vertical to the substrate. A first outer face of the multilayered graphene is in physical contact with a first side face of the first insulative film vertical to the substrate. A second outer face of the multilayered graphene is in physical contact with a second side face of the second insulative film vertical to the substrate.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: March 20, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Sakai, Yuichi Yamazaki, Hisao Miyazaki, Masayuki Katagiri, Taishi Ishikura, Akihiro Kajita
  • Publication number: 20180012846
    Abstract: A graphene structure of an embodiment includes multilayer graphene laminated with graphene sheets, and a first interlayer material being present between the graphene sheets of the multilayer graphene and containing a multimer of molybdenum oxide.
    Type: Application
    Filed: March 1, 2017
    Publication date: January 11, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hisao MIYAZAKI, Takashi YOSHIDA, Masayuki KATAGIRI, Yuichi YAMAZAKI, Tadashi SAKAI
  • Patent number: 9865547
    Abstract: According to one embodiment, a semiconductor device is disclosed. The device includes a graphene layer containing impurities, and including a first region and a second region. The second region has a resistance higher than a resistance of the first region. The second region includes a side surface of an end of the graphene layer. The device further includes a first plug being in contact with the first region.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: January 9, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsunobu Isobayashi, Akihiro Kajita, Tadashi Sakai
  • Publication number: 20170345899
    Abstract: Provided is a semiconductor device according to an embodiment including an i-type or first-conductivity-type first diamond semiconductor layer having a first side surface, a second-conductivity-type second diamond semiconductor layer provided on the first diamond semiconductor layer and having a second side surface, a third diamond semiconductor layer being in contact with the first side surface and the second side surface, the third diamond semiconductor containing nitrogen, a first electrode electrically connected to the first diamond semiconductor layer, and a second electrode electrically connected to the second diamond semiconductor layer.
    Type: Application
    Filed: February 17, 2017
    Publication date: November 30, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Mariko SUZUKI, Tadashi SAKAI
  • Publication number: 20170316973
    Abstract: According to one embodiment, a method for manufacturing a semiconductor device is disclosed. The method includes forming a co-catalyst layer and catalyst layer above a surface of a semiconductor substrate. The co-catalyst layer and catalyst layer have fcc structure. The fcc structure is formed such that (111) face of the fcc structure is to be oriented parallel to the surface of the semiconductor substrate. The catalyst includes a portion which contacts the co-catalyst layer. The portion has the fcc structure. An exposed surface of the catalyst layer is planarized by oxidation and reduction treatments. A graphene layer is formed on the catalyst layer.
    Type: Application
    Filed: July 17, 2017
    Publication date: November 2, 2017
    Inventors: Masayuki KITAMURA, Atsuko SAKATA, Makoto WADA, Yuichi YAMAZAKI, Masayuki KATAGIRI, Akihiro KAJITA, Tadashi SAKAI, Naoshi SAKUMA, Ichiro MIZUSHIMA
  • Patent number: 9768372
    Abstract: A semiconductor device of an embodiment includes a layered substance formed by laminating two-dimensional substances in two or more layers. The layered substance includes at least either one of a p-type region having a first intercalation substance between layers of the layered substance and an n-type region having a second intercalation substance between layers of the layered substance. The layered substance includes a conductive region that is adjacent to at least either one of the p-type region and the n-type region. The conductive region includes neither the first intercalation substance nor the second intercalation substance. A sealing member is formed on the conductive region, or on the conductive region and an end of the layered substance.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: September 19, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisao Miyazaki, Yuichi Yamazaki, Tadashi Sakai
  • Patent number: 9761530
    Abstract: Graphene wiring of an embodiment has a graphene intercalation compound including a multilayer graphene having graphene sheets stacked therein and an interlayer substance disposed between layers of the multilayer graphene, and an interlayer cross-linked layer connected to a side surface of the multilayer graphene. The interlayer cross-linked layer has a cross-linked molecular structure including multiple bonded molecules cross-linking the graphene sheets included in the multilayer graphene.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: September 12, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisao Miyazaki, Tadashi Sakai, Yuichi Yamazaki, Masayuki Katagiri
  • Patent number: 9761531
    Abstract: According to one embodiment, a semiconductor device is disclosed. The device includes interconnects each including a catalyst layer and a graphene layer thereon. The catalyst layer includes a first to fifth catalyst regions arranged along a first direction in order of the first to fifth catalyst regions. The first, third and fifth catalyst regions include upper surfaces higher than those of the second and fourth catalyst regions. Adjacent ones of the first to fifth catalyst regions are in contact with each other. A distance between the first and the third catalyst region and a distance between the third and fifth catalyst region are greater than a mean free path of graphene. The graphene layer includes a first graphene layer on the second catalyst region and a second graphene layer on the fourth catalyst region.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: September 12, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tatsuro Saito, Masayuki Kitamura, Atsuko Sakata, Makoto Wada, Akihiro Kajita, Tadashi Sakai
  • Publication number: 20170256499
    Abstract: A graphene wiring structure of an embodiment has a multilayered graphene having a plurality of planar graphene sheets laminated, and a first interlayer substance being a metal oxyhalide between the plurality of planar graphene sheets.
    Type: Application
    Filed: December 27, 2016
    Publication date: September 7, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hisao MIYAZAKI, Tadashi Sakai, Masayuki Katagiri, Yuichi Yamazaki
  • Patent number: 9741663
    Abstract: According to one embodiment, a semiconductor device includes an underlayer formed on a substrate, a catalyst layer disposed on the underlayer and extending in an interconnect length direction. The device further includes an upper graphene layer formed on an upper face of the catalyst layer, and side graphene layers provided on two respective side faces of the catalyst layer, the two side faces extending in the interconnect length direction.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: August 22, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taishi Ishikura, Atsunobu Isobayashi, Tatsuro Saito, Akihiro Kajita, Tadashi Sakai
  • Publication number: 20170229301
    Abstract: According to one embodiment, a method for manufacturing a semiconductor device is disclosed. The method includes forming a co-catalyst layer and catalyst layer above a surface of a semiconductor substrate. The co-catalyst layer and catalyst layer have fcc structure. The fcc structure is formed such that (111) face of the fcc structure is to be oriented parallel to the surface of the semiconductor substrate. The catalyst includes a portion which contacts the co-catalyst layer. The portion has the fcc structure. An exposed surface of the catalyst layer is planarized by oxidation and reduction treatments. A graphene layer is formed on the catalyst layer.
    Type: Application
    Filed: September 18, 2012
    Publication date: August 10, 2017
    Inventors: Masayuki KITAMURA, Atsuko SAKATA, Makoto WADA, Yuichi YAMAZAKI, Masayuki KATAGIRI, Akihiro KAJITA, Tadashi SAKAI, Naoshi SAKUMA, Ichiro MIZUSHIMA
  • Patent number: 9679851
    Abstract: A graphene wring structure of an embodiment includes multilayer graphene, a first interlayer compound existing in an interlayer space of the multilayer graphene, and a second interlayer compound existing in the interlayer space of the multilayer graphene. The second interlayer compound containing at least one of an oxide, a nitride and a carbide.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: June 13, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Sakai, Hisao Miyazaki, Masayuki Katagiri, Yuichi Yamazaki
  • Patent number: 9659870
    Abstract: Wiring comprises a multilayer graphene including graphene sheets, an interlayer substance disposed between layers of the multilayer graphene, and an organic compound layer connected to a side surface of the multilayer graphene. The organic compound layer contains a photoisomerizable organic group connected to the multilayer graphene.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: May 23, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisao Miyazaki, Tadashi Sakai
  • Patent number: 9646933
    Abstract: According to one embodiment, a semiconductor device includes a first insulating layer on an underlying layer, a first trench formed in the first insulating layer, and a first graphene layer provided in the first trench. The first trench comprises a bottom surface on the underlying and two side surfaces joined to the bottom surface, formed into a U-shape. The first graphene layer has a stacked structure including a plurality of graphene sheets. The plurality of graphene sheets each include a depression in a central portion. Portions of the graphene sheets located in an edge of the first graphene layer are each extended upward, which is in a direction opposite to the bottom surface.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: May 9, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tatsuro Saito, Atsunobu Isobayashi, Akihiro Kajita, Tadashi Sakai
  • Publication number: 20170079138
    Abstract: A graphene wiring structure of an embodiment has a substrate, a metal part on the substrate, multilayered graphene connected to the metal part, a first insulative film on the substrate, and a second insulative film on the substrate. The metal part is present between the first insulative film and the second insulative film. Edges of the multilayered graphene are connected to the metal part. A side face of the first insulative film vertical to the substrate opposes a side face of the second insulative film vertical to the substrate. A first outer face of the multilayered graphene is in physical contact with a first side face of the first insulative film vertical to the substrate. A second outer face of the multilayered graphene is in physical contact with a second side face of the second insulative film vertical to the substrate.
    Type: Application
    Filed: September 1, 2016
    Publication date: March 16, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tadashi SAKAI, Yuichi YAMAZAKI, Hisao MIYAZAKI, Masayuki KATAGIRI, Taishi ISHIKURA, Akihiro KAJITA