Patents by Inventor Tomomasa Ueda

Tomomasa Ueda 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).

  • Patent number: 9159836
    Abstract: According to one embodiment, a thin film transistor includes a substrate, a gate electrode, a first insulating film, an oxide semiconductor film, a second insulating film, a source electrode, and a drain electrode. The gate electrode is provided on a part of the substrate. The first insulating film covers the gate electrode. The oxide semiconductor film is provided on the gate electrode via the first insulating film. The second insulating film is provided on a part of the oxide semiconductor film. The source and drain electrodes are respectively connected to first and second portions of the oxide semiconductor film not covered with the second insulating film. The oxide semiconductor film includes an oxide semiconductor. Concentrations of hydrogen contained in the first and second insulating films are not less than 5×1020 atm/cm3, and not more than 1019 atm/cm3, respectively.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: October 13, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shintaro Nakano, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tatsunori Sakano, Hajime Yamaguchi
  • Patent number: 9159747
    Abstract: According to one embodiment, a display device includes a substrate unit, a thin film transistor, a pixel electrode and a display layer. The substrate unit includes a substrate, a first insulating layer provided on the substrate, and a second insulating layer provided on the first insulating layer. The thin film transistor is provided on the substrate unit and includes a gate electrode provided on the second insulating layer, a semiconductor layer of an oxide separated from the gate electrode, a gate insulation layer provided between the gate electrode and the semiconductor layer, a first conductive portion, a second conductive portion, and a third insulating layer. The pixel electrode is connected to one selected from the first and second conductive portions. The display layer is configured to have a light emission or a change of optical characteristic occurring according to a charge supplied to the pixel electrode.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: October 13, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shintaro Nakano, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tatsunori Sakano, Yuya Maeda, Hajime Yamaguchi
  • Patent number: 9087746
    Abstract: A thin film transistor includes: an insulating layer; a gate electrode provided on the insulating layer; a gate insulating film provided on the gate electrode; a semiconductor layer provided on the gate insulating film, the semiconductor layer being formed of oxide; source and drain electrodes provided on the semiconductor layer; and a channel protecting layer provided between the source and drain electrodes and the semiconductor layer. The source electrode is opposed to one end of the gate electrode. The drain electrode is opposed to another end of the gate electrode. The another end is opposite to the one end. The drain electrode is apart from the source electrode. The channel protecting layer covers at least a part of a side face of a part of the semiconductor layer. The part of the semiconductor layer is not covered with the source and drain electrodes above the gate electrode.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: July 21, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomomasa Ueda, Shintaro Nakano, Shuichi Uchikoga
  • Patent number: 9029853
    Abstract: According to one embodiment, a display device includes a first insulating layer, a second insulating layer, a pixel electrode, a light emitting layer, an opposite electrode and a pixel circuit. The second insulating layer is provided on the first insulating layer. The pixel electrode is provided on the second insulating layer and light-transmissive. The light emitting layer is provided on the pixel electrode. The opposite electrode is provided on the light emitting layer. The circuit is provided between the first insulating layer and the second insulating layer, includes an interconnect supplied with a drive current, and is configured to supply the drive current to the pixel electrode. The circuit is connected to the pixel electrode. The interconnect has a first region overlaying the pixel electrode when projected onto a plane parallel to the first insulating layer. The interconnect has an opening in the first region.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: May 12, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomomasa Ueda, Toshiya Yonehara, Hajime Yamaguchi, Kentaro Miura, Shintaro Nakano, Tatsunori Sakano
  • Patent number: 9006828
    Abstract: A display device includes a first electrode, a second electrode, an organic light emitting layer, a first transistor, and a second transistor. The first transistor includes a first semiconductor layer, a first conductive unit, a second conductive unit, a first gate electrode, and a first gate insulating film. The second transistor includes a second semiconductor layer, a third conductive unit, a fourth conductive unit, a second gate electrode, and a second gate insulating film. An amount of hydrogen included in the first gate insulating film is larger than an amount of hydrogen included in the second gate insulating film.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: April 14, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomomasa Ueda, Yuya Maeda, Kentaro Miura, Shintaro Nakano, Tatsunori Sakano, Hajime Yamaguchi
  • Patent number: 8994020
    Abstract: According to one embodiment, a display device includes a thin film transistor. The thin film transistor includes a gate insulating film, a semiconductor layer, a gate electrode, first and second channel protection films, first and second conductive layers, and a passivation film. The semiconductor layer is provided on a major surface of the gate insulating film. The semiconductor layer includes first to seventh portions. The gate insulating film is disposed between the semiconductor layer and the gate electrode. The first channel protection film covers the third portion. The second channel protection film covers the fifth and fourth portions, and an upper surface of the first channel protection film. The first conductive layer covers the sixth portion. The second conductive layer covers the seventh portion. The passivation film covers the first and second portions, the first and second conductive layers, and the second channel protection film.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 31, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shintaro Nakano, Kentaro Miura, Nobuyoshi Saito, Tatsunori Sakano, Tomomasa Ueda, Hajime Yamaguchi
  • Publication number: 20150084040
    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: Application
    Filed: August 8, 2014
    Publication date: March 26, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shintaro NAKANO, Tomomasa UEDA, Kentaro MIURA, Nobuyoshi SAITO, Tatsunori SAKANO, Yuya MAEDA, Masaki ATSUTA, Hajime YAMAGUCHI
  • Publication number: 20150084021
    Abstract: A semiconductor element includes a semiconductor layer, a first and a second conductive unit, a gate electrode, and a gate insulating film. The semiconductor layer includes a first portion, a second portion, and a third portion provided between the first portion and the second portion. The first conductive unit is electrically connected to the first portion. The second conductive unit is electrically connected to the second portion. The gate electrode is separated from the first conductive unit, the second conductive unit, and the third portion. The gate electrode opposes the third portion. The gate insulating film is provided between the third portion and the gate electrode. A concentration of nitrogen of the first portion is higher than a concentration of nitrogen of the third portion. A concentration of nitrogen of the second portion is higher than the concentration of nitrogen of the third portion.
    Type: Application
    Filed: August 18, 2014
    Publication date: March 26, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shintaro NAKANO, Tomomasa UEDA, Kentaro MIURA, Nobuyoshi SAITO, Tatsunori SAKANO, Yuya MAEDA, Masaki ATSUTA, Hajime YAMAGUCHI
  • Publication number: 20150087093
    Abstract: According to one embodiment, a method is disclosed for manufacturing a display device. The method can include forming a first resin layer on a substrate. The method can include forming a display layer on the first resin layer. The display layer includes a plurality of pixels arranged in a direction perpendicular to a stacking direction of the first resin layer and the display layer. Each of the pixels includes a first electrode provided on the first resin layer, an organic light emitting layer provided on the first electrode, and a second electrode provided on the organic light emitting layer. The method can include bonding a second resin layer onto the display layer via a bonding layer. The method can include removing the substrate. The method can include increasing a density of the bonding layer.
    Type: Application
    Filed: August 13, 2014
    Publication date: March 26, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsunori SAKANO, Kentaro Miura, Tomomasa Ueda, Nobuyoshi Saito, Shintaro Nakano, Yuya Maeda, Hajime Yamaguchi
  • Publication number: 20150084042
    Abstract: According to one embodiment, a thin film transistor includes a first insulating film, a gate electrode, a semiconductor layer, a gate insulator film, a second insulating film, a source electrode, a tunneling insulating portion, and a drain electrode. The semiconductor layer is provided between the gate electrode and the first insulating film, and includes an amorphous oxide. The gate insulator film is provided between the semiconductor layer and the gate electrode. The second insulating film is provided between the semiconductor layer and the first insulating film. The tunneling insulating portion is provided between the semiconductor layer and the source electrode, and between the semiconductor layer and the drain electrode, and between the first insulating film and the second insulating film. The tunneling insulating portion includes oxygen and at least one selected from aluminum and magnesium. A thickness of the tunneling insulating portion is 2 nanometers or less.
    Type: Application
    Filed: August 22, 2014
    Publication date: March 26, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuya MAEDA, Hajime YAMAGUCHI, Tomomasa UEDA, Kentaro MIURA, Shintaro NAKANO, Nobuyoshi SAITO, Tatsunori SAKANO
  • Patent number: 8987712
    Abstract: According to one embodiment, a display device includes a light transmissive substrate, a light transmissive pixel electrode, a switching element, an organic light emitting layer, a light transmissive opposite electrode, a conductive light absorption layer and a conductive film. The light transmissive pixel electrode is provided on the substrate. The switching element is provided on the substrate and electrically connected to the pixel electrode. The organic light emitting layer is provided on the pixel electrode. The light transmissive opposite electrode is provided on the organic light emitting layer. The conductive light absorption layer is provided on the opposite electrode. The conductive film is provided on the light absorption layer.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Kentaro Miura, Tomomasa Ueda, Shintaro Nakano, Tatsunori Sakano, Hajime Yamaguchi
  • Publication number: 20150076471
    Abstract: A display device includes a first electrode, a second electrode, an organic light emitting layer, a first transistor, and a second transistor. The first transistor includes a first semiconductor layer, a first conductive unit, a second conductive unit, a first gate electrode, and a first gate insulating film. The second transistor includes a second semiconductor layer, a third conductive unit, a fourth conductive unit, a second gate electrode, and a second gate insulating film. An amount of hydrogen included in the first gate insulating film is larger than an amount of hydrogen included in the second gate insulating film.
    Type: Application
    Filed: August 7, 2014
    Publication date: March 19, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi SAITO, Tomomasa Ueda, Yuya Maeda, Kentaro Miura, Shintaro Nakano, Tatsunori Sakano, Hajime Yamaguchi
  • Patent number: 8933920
    Abstract: A display device includes a plurality of pixel portions provided in a matrix form. Each of the pixel portions includes a pixel circuit and a light-emitting element. The pixel circuit includes a driving transistor connected between the light-emitting element and a first power supply line, a capacitor connected at its one end to a gate of the driving transistor, a switching transistor connected between the other end of the capacitor and a signal line, a threshold voltage detection transistor connected between a connecting point between the light-emitting element and the driving transistor, and a connecting point between the capacitor and the switching transistor, and a reset transistor connected between a connecting point between the driving transistor and the first power supply line, and a connecting point between the gate of the driving transistor and the capacitor, and connected at its gate to a reset control line.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: January 13, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomomasa Ueda, Yujiro Hara
  • Patent number: 8933444
    Abstract: According to one embodiment, a display device includes a substrate, a thin film transistor, a passivation film, a hydrogen barrier film, a pixel electrode, an organic light emitting layer, an opposite electrode, and a sealing film. The thin film transistor is provided on a major surface of the substrate. The thin film transistor includes a gate electrode, a gate insulating film, a semiconductor film, a first conducting portion, and a second conducting portion. The passivation film is provided on the thin film transistor. The hydrogen barrier film is provided on the passivation film. The pixel electrode is electrically connected to one of the first conducting portion and the second conducting portion. The organic light emitting layer is provided on the pixel electrode. The opposite electrode is provided on the organic light emitting layer. The sealing film is provided on the hydrogen barrier film and the opposite electrode.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 13, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Kentaro Miura, Shintaro Nakano, Tatsunori Sakano, Tomomasa Ueda, Hajime Yamaguchi
  • Publication number: 20140374753
    Abstract: A thin film transistor includes: an insulating layer; a gate electrode provided on the insulating layer; a gate insulating film provided on the gate electrode; a semiconductor layer provided on the gate insulating film, the semiconductor layer being formed of oxide; source and drain electrodes provided on the semiconductor layer; and a channel protecting layer provided between the source and drain electrodes and the semiconductor layer. The source electrode is opposed to one end of the gate electrode. The drain electrode is opposed to another end of the gate electrode. The another end is opposite to the one end. The drain electrode is apart from the source electrode. The channel protecting layer covers at least a part of a side face of a part of the semiconductor layer. The part of the semiconductor layer is not covered with the source and drain electrodes above the gate electrode.
    Type: Application
    Filed: September 5, 2014
    Publication date: December 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Nobuyoshi SAITO, Tomomasa UEDA, Shintaro NAKANO, Shuichi UCHIKOGA
  • Patent number: 8916858
    Abstract: According to one embodiment, a display device includes a substrate, a thin film transistor, a pixel electrode, an organic light emitting layer, a common electrode, and a sealing unit. The thin film transistor is provided on the substrate. The thin film transistor includes a gate electrode, a gate insulating film, a semiconductor film, a first conducting portion, and a second conducting portion. The pixel electrode is electrically connected to one of the first conducting portion and the second conducting portion. The organic light emitting layer is provided on the pixel electrode. The common electrode is provided on the organic light emitting layer. The sealing unit is provided on the common electrode. The sealing unit includes a first sealing film and a second sealing film. A refractive index of the second sealing film is different from a refractive index of the first sealing film.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: December 23, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shintaro Nakano, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tatsunori Sakano, Hajime Yamaguchi
  • Patent number: 8895376
    Abstract: A thin film transistor includes: an insulating layer; a gate electrode provided on the insulating layer; a gate insulating film provided on the gate electrode; a semiconductor layer provided on the gate insulating film, the semiconductor layer being formed of oxide; source and drain electrodes provided on the semiconductor layer; and a channel protecting layer provided between the source and drain electrodes and the semiconductor layer. The source electrode is opposed to one end of the gate electrode. The drain electrode is opposed to another end of the gate electrode. The another end is opposite to the one end. The drain electrode is apart from the source electrode. The channel protecting layer covers at least a part of a side face of a part of the semiconductor layer. The part of the semiconductor layer is not covered with the source and drain electrodes above the gate electrode.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: November 25, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomomasa Ueda, Shintaro Nakano, Shuichi Uchikoga
  • Patent number: 8872738
    Abstract: According to one embodiment, a display device includes an insulating layer, a display unit, and an organic EL layer. The display unit is provided on a major surface of the insulating layer and includes a plurality of gate lines, a plurality of signal lines, a plurality of power source lines and a plurality of pixel units arranged in a matrix configuration. The EL layer is provided on the display unit. Each pixel unit includes a drive transistor and a resistor. The drive transistor includes a drive gate electrode, a drive source electrode, and a drive drain electrode. The drive source electrode or the drive drain electrode is connected to one of the power source lines. An end of the resistor is connected to the drive gate electrode. An other end of the resistor is connected to one of the gate line, the signal line, and the power source line.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: October 28, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuyoshi Saito, Tomomasa Ueda, Hajime Yamaguchi, Kentaro Miura, Shintaro Nakano, Tatsunori Sakano
  • Publication number: 20140284594
    Abstract: According to one embodiment, a display device includes a substrate unit, a thin film transistor, a pixel electrode and a display layer. The substrate unit includes a substrate, a first insulating layer provided on the substrate, and a second insulating layer provided on the first insulating layer. The thin film transistor is provided on the substrate unit and includes a gate electrode provided on the second insulating layer, a semiconductor layer of an oxide separated from the gate electrode, a gate insulation layer provided between the gate electrode and the semiconductor layer, a first conductive portion, a second conductive portion, and a third insulating layer. The pixel electrode is connected to one selected from the first and second conductive portions. The display layer is configured to have a light emission or a change of optical characteristic occurring according to a charge supplied to the pixel electrode.
    Type: Application
    Filed: February 7, 2014
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shintaro NAKANO, Tomomasa Ueda, Kentaro Miura, Nobuyoshi Saito, Tatsunori Sakano, Yuya Maeda, Hajime Yamaguchi
  • Publication number: 20140285914
    Abstract: According to one embodiment, a method for manufacturing a display device is disclosed. The method can include bonding a display body to a filter body, irradiating light and separating. The display body includes a first support unit and a display unit. The first support unit includes a first substrate, a first metal layer, and a first resin layer. The display unit has a first region and a second region. The filter body includes a second support unit and a filter unit. The second support unit includes a second substrate, a second metal layer and a second resin layer. In the bonding, the display unit and the filter unit are disposed between the first and second substrates. The light is irradiated onto the first and second metal layers. The first substrate is separated from the first resin layer and the second substrate is separated from the second resin layer.
    Type: Application
    Filed: February 3, 2014
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsunori SAKANO, Kentaro Miura, Tomomasa Ueda, Nobuyoshi Saito, Shintaro Nakano, Yuya Maeda, Hajime Yamaguchi