Patents by Inventor Nobuyoshi Saito

Nobuyoshi Saito 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: 20190237581
    Abstract: According to one embodiment, a transistor includes first to third conductors, first and second oxide semiconductors, and a gate insulating film. The first and second conductors are stacked via an insulator above a substrate. The first oxide semiconductor is formed on the first conductor. The second oxide semiconductor is formed on the first oxide semiconductor. The second oxide semiconductor have a pillar shape through the second conductor along a first direction crossing a surface of the substrate. The second oxide semiconductor is different from the first oxide semiconductor. The gate insulating film is formed between the second conductor and the second oxide semiconductor. The third conductor is formed on the second oxide semiconductor.
    Type: Application
    Filed: September 5, 2018
    Publication date: August 1, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Nobuyoshi SAITO, Tomomasa UEDA, Kentaro MIURA, Keiji IKEDA, Tsutomu TEZUKA
  • Patent number: 10312239
    Abstract: According to one embodiment, a memory includes: a bit line; a source line; a pillar extending in a first direction and including an oxide semiconductor layer; first, second and third layers arranged along the first direction and opposed to a side of the pillar; a memory cell at an intersection between the first layer and the pillar, the memory cell including a charge storage layer in the oxide semiconductor layer; a first transistor at an intersection between the second layer and the pillar; and a second transistor at an intersection between the third layer and the pillar. A first end of the oxide semiconductor layer in the first direction is in contact with the source line, and a second end of the oxide semiconductor layer in the first direction is electrically disconnected from the bit line.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: June 4, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Tsutomu Tezuka, Fumitaka Arai, Keiji Ikeda, Tomomasa Ueda, Nobuyoshi Saito, Chika Tanaka, Kentaro Miura
  • Patent number: 10192876
    Abstract: According to one embodiment, a transistor includes: a gate electrode; a gate insulating layer provided on the gate electrode; an oxide semiconductor layer provided on the gate insulating layer; an oxygen supply layer provided on the oxide semiconductor layer; a first oxygen barrier layer provided on the oxygen supply layer; a source electrode provided to penetrate the oxygen supply layer and the first oxygen barrier layer and connected to the oxide semiconductor layer; and a drain electrode spaced apart from the source electrode, provided to penetrate the oxygen supply layer and the first oxygen barrier layer, and connected to the oxide semiconductor layer.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: January 29, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Kentaro Miura, Tomomasa Ueda, Keiji Ikeda, Nobuyoshi Saito
  • Publication number: 20180350829
    Abstract: According to one embodiment, a memory includes: a member extending in a first direction and including an oxide semiconductor layer including first to third portions arranged in order from the bit line to the source line; first, second and third conductive layers arranged along the first direction and facing the first to third portions, respectively, the first conductive layer including first material, and each of the second and third conductive layer including a second material different from the first material; a memory cell in a first position corresponding to the first portion, the memory cell including a charge storage layer in the oxide semiconductor layer; a first transistor in a second position corresponding to the second portion; and a second transistor in a third position corresponding to the third portion.
    Type: Application
    Filed: July 20, 2018
    Publication date: December 6, 2018
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Tsutomu TEZUKA, Fumitaka ARAI, Keiji IKEDA, Tomomasa UEDA, Nobuyoshi SAITO, Chika TANAKA, Kentaro MIURA, Tomoaki SAWABE
  • Publication number: 20180331116
    Abstract: According to one embodiment, a memory includes: a first gate of a first transistor and a second gate electrode of the second transistor facing the a semiconductor layer; an oxide semiconductor layer between the first and second transistors and including first to fifth portions in order; a third gate of a first cell facing the first portion; a fourth gate of a third transistor facing the second portion; a fifth gate of a second cell facing the third portion; a sixth gate of a fourth transistor facing the fourth portion; an interconnect connected to the fifth portion; a source line connected to the first transistor; and a bit line connected to the second transistor. A material of the third gate is different from a material of the fourth gate.
    Type: Application
    Filed: July 20, 2018
    Publication date: November 15, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Tsutomu TEZUKA, Fumitaka ARAI, Keiji IKEDA, Tomomasa UEDA, Nobuyoshi SAITO, Chika TANAKA, Kentaro MIURA, Tomoaki SAWABE
  • Publication number: 20180269210
    Abstract: According to one embodiment, a memory includes: a bit line; a source line; a pillar extending in a first direction and including an oxide semiconductor layer; first, second and third layers arranged along the first direction and opposed to a side of the pillar; a memory cell at an intersection between the first layer and the pillar, the memory cell including a charge storage layer in the oxide semiconductor layer; a first transistor at an intersection between the second layer and the pillar; and a second transistor at an intersection between the third layer and the pillar. A first end of the oxide semiconductor layer in the first direction is in contact with the source line, and a second end of the oxide semiconductor layer in the first direction is electrically disconnected from the bit line.
    Type: Application
    Filed: September 14, 2017
    Publication date: September 20, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Tsutomu TEZUKA, Fumitaka Arai, Keiji Ikeda, Tomomasa Ueda, Nobuyoshi Saito, Chika Tanaka, Kentaro Miura
  • Publication number: 20180269217
    Abstract: According to one embodiment, a transistor includes: a gate electrode; a gate insulating layer provided on the gate electrode; an oxide semiconductor layer provided on the gate insulating layer; an oxygen supply layer provided on the oxide semiconductor layer; a first oxygen barrier layer provided on the oxygen supply layer; a source electrode provided to penetrate the oxygen supply layer and the first oxygen barrier layer and connected to the oxide semiconductor layer; and a drain electrode spaced apart from the source electrode, provided to penetrate the oxygen supply layer and the first oxygen barrier layer, and connected to the oxide semiconductor layer.
    Type: Application
    Filed: September 7, 2017
    Publication date: September 20, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Kentaro MIURA, Tomomasa Ueda, Keiji Ikeda, Nobuyoshi Saito
  • Patent number: 10043808
    Abstract: According to one embodiment, a semiconductor memory includes: a first gate of a first select transistor and a second gate of a second select transistor on a gate insulating film on a semiconductor layer; an oxide semiconductor layer above the semiconductor layer; a first control gate of a first cell and a second control gate of a second cell on an insulating layer on the oxide semiconductor layer; a third gate of a first transistor between the first control gate and the second control gate; a fourth gate of a second transistor between a first end of the oxide semiconductor layer and the second control gate; an interconnect connected to the first end; a source line connected to the first select transistor; and a bit line connected to the second select transistor.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: August 7, 2018
    Assignee: Toshiba Memory Corporation
    Inventors: Tsutomu Tezuka, Fumitaka Arai, Keiji Ikeda, Tomomasa Ueda, Nobuyoshi Saito, Chika Tanaka, Kentaro Miura
  • Patent number: 9871060
    Abstract: According to one embodiment, a semiconductor light emitting device includes a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, a third semiconductor layer. The third semiconductor is provided between the first semiconductor layer and the second semiconductor layer. A first transistor includes a first gate electrode and a first amorphous semiconductor layer. The first gate electrode and the first amorphous semiconductor layer overlap in a first direction. The first direction is from the first semiconductor layer toward the second semiconductor layer. The first gate electrode is provided between the second semiconductor layer and the first amorphous semiconductor layer.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: January 16, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomio Ono, Shigeya Kimura, Jumpei Tajima, Kentaro Miura, Shintaro Nakano, Yuya Maeda
  • Patent number: 9837549
    Abstract: According to one embodiment, an oxide semiconductor includes indium, gallium, and silicon. A concentration of the silicon in the oxide semiconductor is not less than 7 atomic percent and not more than 11 atomic percent.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: December 5, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiji Ikeda, Shintaro Nakano, Yuya Maeda, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tsutomu Tezuka
  • Patent number: 9780220
    Abstract: According to one embodiment, a semiconductor device includes an oxide semiconductor transistor. The oxide semiconductor transistor includes a semiconductor layer including an oxide semiconductor, the semiconductor layer including a source region and a source electrode. The source electrode includes a source conductive layer including copper, a first tantalum-containing region provided between the source conductive layer and the source region, the first tantalum-containing region including tantalum, a first low nitrogen composition region provided between the first tantalum-containing region and the source region, the first low nitrogen composition region including Ta1?x1Nx1 (0<x1<0.5), and a first high nitrogen composition region provided between the first low nitrogen composition region and the source region, the first high nitrogen composition region including Ta1?x2Nx2 (0.5?x2<1).
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: October 3, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuya Maeda, Shintaro Nakano, Nobuyoshi Saito, Hajime Yamaguchi
  • Publication number: 20170141230
    Abstract: According to one embodiment, an oxide semiconductor includes indium, gallium, and silicon. A concentration of the silicon in the oxide semiconductor is not less than 7 atomic percent and not more than 11 atomic percent.
    Type: Application
    Filed: September 16, 2016
    Publication date: May 18, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Keiji IKEDA, Shintaro Nakano, Yuya Maeda, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tsutomu Tezuka
  • Patent number: 9640718
    Abstract: According to one embodiment, a method for manufacturing a display element is disclosed. The method can include forming a peeling layer, forming a resin layer, forming a barrier layer, forming an interconnect layer, forming a display layer, and removing. The peeling layer is formed on a major surface of a base body. The major surface has first, second, and third regions. The peeling layer includes first, second, and third peeling portions. The resin layer is formed on the peeling layer. The resin layer includes first and second resin portions. The barrier layer is formed on the first, second, and third peeling portions. The interconnect layer is formed on the barrier layer. The display layer is formed on the interconnect layer. The first peeling portion is removed from the first resin portion and the second peeling portion is removed from the second resin portion.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: May 2, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kentaro Miura, Tatsunori Sakano, Tomomasa Ueda, Nobuyoshi Saito, Shintaro Nakano, Yuya Maeda, Hajime Yamaguchi
  • Patent number: 9614099
    Abstract: According to one embodiment, a semiconductor device includes a semiconductor layer including a first semiconductor portion and a second semiconductor portion being continuous with the first semiconductor portion, a first gate electrode, a second gate electrode, an insulating film. The first semiconductor portion includes a first portion, a second portion and a third portion provided between the first portion and the second portion. The second semiconductor portion includes a fourth portion separated from the first portion, a fifth portion separated from the second portion, and a sixth portion provided between the forth portion and the fifth portion. The first gate electrode is separated from the third portion. The second gate electrode is separated from the sixth portion. The insulating film is provided at a first position between the first gate electrode and the semiconductor layer and at a second position between the second gate electrode and the semiconductor layer.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: April 4, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shintaro Nakano, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tatsunori Sakano, Yuya Maeda, Masaki Atsuta, Hajime Yamaguchi
  • Publication number: 20170033239
    Abstract: A semiconductor device includes a substrate having a major surface and a thin film transistor on the substrate. The thin film transistor includes an oxynitride semiconductor layer, first and second conductive layers, a first gate electrode and a first insulating layer. The oxynitride semiconductor layer includes a first portion electrically connected to the first conductive layer, a second portion electrically connected to the second conductive layer, and a third portion provided between the first and second portions. The oxynitride semiconductor layer includes indium, gallium, zinc, and nitrogen, a nitrogen content of the oxynitride semiconductor layer being 2 atomic % or less, and a gallium content of the oxynitride semiconductor layer is more than the nitrogen content. The first gate electrode is separated from the third portion in a direction intersecting the first direction; and the first insulating layer is provided between the third portion and the first gate electrode.
    Type: Application
    Filed: August 5, 2016
    Publication date: February 2, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shintaro NAKANO, Nobuyoshi SAITO, Kentaro MIURA, Yuya MAEDA
  • Publication number: 20160378249
    Abstract: According to an embodiment, an input device includes the following elements. The flexible touch panel includes a sensor area. The touch position detector detects a touch position on the sensor area to generate a detection signal. The deformation position detector detects a deformation position where a deformation amount is not less than a threshold on the sensor area. The input rejection area determination unit determines, based on the deformation position, an input rejection area. The input signal generator fails to output the detection signal as an input signal if the touch position is detected in the input rejection area, and outputs the detection signal as an input signal if the touch position is detected in an area other than the input rejection area.
    Type: Application
    Filed: September 9, 2016
    Publication date: December 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kentaro MIURA, Hajime YAMAGUCHI, Tatsunori SAKANO, Tomomasa UEDA, Nobuyoshi SAITO, Shintaro NAKANO
  • Publication number: 20160372604
    Abstract: According to one embodiment, a semiconductor device includes an oxide semiconductor transistor. The oxide semiconductor transistor includes a semiconductor layer including an oxide semiconductor, the semiconductor layer including a source region and a source electrode. The source electrode includes a source conductive layer including copper, a first tantalum-containing region provided between the source conductive layer and the source region, the first tantalum-containing region including tantalum, a first low nitrogen composition region provided between the first tantalum-containing region and the source region, the first low nitrogen composition region including Ta1?x1Nx1 (0<x1<0.5), and a first high nitrogen composition region provided between the first low nitrogen composition region and the source region, the first high nitrogen composition region including Ta1?x2Nx2 (0.5?x2<1).
    Type: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuya MAEDA, Shintaro NAKANO, Nobuyoshi SAITO, Hajime YAMAGUCHI
  • Publication number: 20160240561
    Abstract: According to one embodiment, a semiconductor light emitting device includes a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, a third semiconductor layer. The third semiconductor is provided between the first semiconductor layer and the second semiconductor layer. A first transistor includes a first gate electrode and a first amorphous semiconductor layer. The first gate electrode and the first amorphous semiconductor layer overlap in a first direction. The first direction is from the first semiconductor layer toward the second semiconductor layer. The first gate electrode is provided between the second semiconductor layer and the first amorphous semiconductor layer.
    Type: Application
    Filed: February 9, 2016
    Publication date: August 18, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi SAITO, Tomio ONO, Shigeya KIMURA, Jumpei TAJIMA, Kentaro MIURA, Shintaro NAKANO, Yuya MAEDA
  • Patent number: 9412765
    Abstract: According to one embodiment, a thin film transistor includes: a substrate; a semiconductor layer; first and second insulating films; and gate, source and drain electrodes. The semiconductor layer is provided on the substrate. The semiconductor layer is made of an oxide having indium. The semiconductor layer has first and second regions and other region. The first insulating film covers a top face of the other region. The second insulating film covers at least a pair of side surfaces of the semiconductor layer. The second insulating film is formed under a condition different from that for the first insulating film. The gate electrode is provided on the first and second insulating films or below the semiconductor layer. The source and drain electrodes are provided on the first and second regions, respectively. The drain and source electrodes sandwich the pair of the side surfaces of the semiconductor layer.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: August 9, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomomasa Ueda, Shintaro Nakano, Nobuyoshi Saito, Kentaro Miura, Yujiro Hara, Hajime Yamaguchi
  • Patent number: 9344661
    Abstract: According to an embodiment, a photodetector includes a plurality of photoelectric transducers, a plurality of resistors, and a plurality of resetting sections. Each of the photoelectric transducers is configured to output a detection signal resulting from conversion of received light into an electric charge. Each of the resistors is connected in series with an output end of a corresponding photoelectric transducer at one end of the resistor. Each of the resetting sections is connected in parallel with a corresponding resistor and configured to bring the output end of the corresponding photoelectric transducer to a reset level in response to the detection signal.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: May 17, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Nobuyoshi Saito, Hideyuki Funaki, Shunsuke Kimura, Shintaro Nakano, Go Kawata, Rei Hasegawa