Patents by Inventor Yasushi Fujioka

Yasushi Fujioka 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: 10916447
    Abstract: In a semiconductor device including a crystalline nitride layer, in which diamond is used for heat dissipation thereof, it is an object of the present invention to suppress cracking of the crystalline nitride layer. The semiconductor device includes a layered body and a heat dissipation layer. The layered body includes a crystalline nitride layer and a composite layer. The composite layer includes a non-inhibiting portion which does not inhibit diamond growth on a surface thereof and an inhibiting portion which inhibits the diamond growth on the surface. A layered body main surface of the layered body has a first region in which the non-inhibiting portion is exposed and a second region in which the inhibiting portion is exposed. The heat dissipation layer is made of diamond, opposed to the main surface, adhered to the first region, and separated from the second region with a void interposed therebetween.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: February 9, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yasushi Fujioka, Takeo Furuhata, Tomohiro Shinagawa, Keisuke Nakamura
  • Patent number: 10559659
    Abstract: A power semiconductor device includes an emitter electrode disposed on a semiconductor substrate and through which a main current flows, a conductive layer that is disposed on the emitter electrode and is not a sintered compact, and a sintered metal layer that is disposed on the conductive layer and is a sintered compact. The sintered metal layer has a size to cover all the emitter electrode in plan view, and has higher heat conductivity than the conductive layer. The power semiconductor device can improve heat dissipation performance and adhesion.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: February 11, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsufumi Inoue, Seiji Oka, Tsuyoshi Kawakami, Akihiko Furukawa, Hidetada Tokioka, Mutsumi Tsuda, Yasushi Fujioka
  • Publication number: 20190058037
    Abstract: A power semiconductor device includes an emitter electrode disposed on a semiconductor substrate and through which a main current flows, a conductive layer that is disposed on the emitter electrode and is not a sintered compact, and a sintered metal layer that is disposed on the conductive layer and is a sintered compact. The sintered metal layer has a size to cover all the emitter electrode in plan view, and has higher heat conductivity than the conductive layer. The power semiconductor device can improve heat dissipation performance and adhesion.
    Type: Application
    Filed: December 21, 2016
    Publication date: February 21, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Atsufumi INOUE, Seiji OKA, Tsuyoshi KAWAKAMI, Akihiko FURUKAWA, Hidetada TOKIOKA, Mutsumi TSUDA, Yasushi FUJIOKA
  • Publication number: 20190051538
    Abstract: In a semiconductor device including a crystalline nitride layer, in which diamond is used for heat dissipation thereof, it is an object of the present invention to suppress cracking of the crystalline nitride layer. The semiconductor device includes a layered body and a heat dissipation layer. The layered body includes a crystalline nitride layer and a composite layer. The composite layer includes a non-inhibiting portion which does not inhibit diamond growth on a surface thereof and an inhibiting portion which inhibits the diamond growth on the surface. A layered body main surface of the layered body has a first region in which the non-inhibiting portion is exposed and a second region in which the inhibiting portion is exposed. The heat dissipation layer is made of diamond, opposed to the main surface, adhered to the first region, and separated from the second region with a void interposed therebetween.
    Type: Application
    Filed: March 14, 2017
    Publication date: February 14, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yasushi FUJIOKA, Takeo FURUHATA, Tomohiro SHINAGAWA, Keisuke NAKAMURA
  • Patent number: 7750233
    Abstract: A thin film solar cell includes: a transparent conductive film arranged on a translucent insulating substrate; first and second separation trenches orthogonal to each other on the translucent insulating substrate and separating the transparent conductive film; and a first opening trench parallel to the first separation trench and second opening trenches parallel to said second separation trench, orthogonal to each other on the translucent insulating substrate; wherein solar cells formed on the translucent insulating substrate are arranged at adjacent positions with said first opening trench positioned therebetween and at adjacent positions with said second opening trench positioned therebetween; pairs of said solar cells adjacent to each other with said first opening trench positioned therebetween are electrically connected, and among pairs of solar cells positioned adjacent to each other with the second opening trench in between, some are electrically connected to each other, and others are electrically insu
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: July 6, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasushi Fujioka, Tohru Takeda
  • Patent number: 7722738
    Abstract: A semiconductor device manufacturing unit is provided, wherein a cathode and an anode can be placed in a simple structure; wherein excellent film deposition and film thickness distribution can be gained; and wherein no cooling devices are required to be provided. A chamber 11 is formed so that the inside thereof can be controlled at a vacuum of an arbitrary degree. Anode supports 6 for supporting an anode 4 are placed at the bottom of the internal structure 8. The anode 4 is made of a material having a high electrical conductivity and a high heat resistance. The temperature of the anode 4 is controlled by a heater 24 so as to be in a range of from room temperature to 600° C. A cathode 2 is placed on a cathode support 5 so as to face the anode 4. The cathode support 5 is attached to an internal structure 8 made of a frame in a rectangular prism form provided within the chamber 11.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: May 25, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsushi Kishimoto, Yusuke Fukuoka, Yasushi Fujioka, Hiroyuki Fukuda, Katsuhiko Nomoto
  • Patent number: 7565880
    Abstract: A plasma CVD apparatus comprises an anode electrode and a cathode electrode, and is for forming a thin film on a substrate by performing plasma discharge between the anode electrode and the cathode electrode, comprising: a substrate holder disposed between the anode electrode and the cathode electrode; and one conductive member disposed between the substrate holder and one electrode of either the anode electrode or the cathode electrode, wherein the substrate holder supports the substrate, the one conductive member is provided between the one electrode and the substrate holder so as to substantially cover an entire space between the one electrode and the substrate holder, and the one conductive member is electrically connected to the one electrode and the substrate holder.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: July 28, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akira Shimizu, Yuhsuke Fukuoka, Yasushi Fujioka, Katsushi Kishimoto, Katsuhiko Nomoto
  • Publication number: 20090145555
    Abstract: There is disclosed an exhaust processing process of a processing apparatus for processing a substrate or a film, which comprises after the processing of the substrate or the film, introducing a non-reacted gas and/or a by-product into a trap means comprising a filament comprised of a high-melting metal material comprising as a main component at least one of tungsten, molybdenum and rhenium; and processing the non-reacted gas and/or the by-product inside the trap means. This makes it possible to prevent lowering in exhaust conductance, to lengthen the maintenance cycle of the processing apparatus, and to provide a high-quality product (processed substrate or film).
    Type: Application
    Filed: December 3, 2008
    Publication date: June 11, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: TADASHI SAWAYAMA, YASUSHI FUJIOKA, MASAHIRO KANAI, SHOTARO OKABE, YUZO KOHDA, TADASHI HORI, KOICHIRO MORIYAMA, HIROYUKI OZAKI, YUKITO AOTA, ATSUSHI KOIKE, MITSUYUKI NIWA, YASUYOSHI TAKAI, HIDETOSHI TSUZUKI
  • Publication number: 20090114155
    Abstract: There is disclosed an exhaust processing process of a processing apparatus for processing a substrate or a film, which comprises after the processing of the substrate or the film, introducing a non-reacted gas and/or a by-product into a trap means comprising a filament comprised of a high-melting metal material comprising as a main component at least one of tungsten, molybdenum and rhenium; and processing the non-reacted gas and/or the by-product inside the trap means. This makes it possible to prevent lowering in exhaust conductance, to lengthen the maintenance cycle of the processing apparatus, and to provide a high-quality product (processed substrate or film).
    Type: Application
    Filed: December 3, 2008
    Publication date: May 7, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tadashi Sawayama, Yasushi Fujioka, Masahiro Kanai, Shotaro Okabe, Yuzo Kohda, Tadashi Hori, Koichiro Moriyama, Hiroyuki Ozaki, Yukito Aota, Atsushi Koike, Mitsuyuki Niwa, Yasuyoshi Takai, Hidetoshi Tsuzuki
  • Publication number: 20090095420
    Abstract: There is disclosed an exhaust processing process of a processing apparatus for processing a substrate or a film, which comprises after the processing of the substrate or the film, introducing a non-reacted gas and/or a by-product into a trap means comprising a filament comprised of a high-melting metal material comprising as a main component at least one of tungsten, molybdenum and rhenium; and processing the non-reacted gas and/or the by-product inside the trap means. This makes it possible to prevent lowering in exhaust conductance, to lengthen the maintenance cycle of the processing apparatus, and to provide a high-quality product (processed substrate or film).
    Type: Application
    Filed: December 3, 2008
    Publication date: April 16, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tadashi Sawayama, Yasushi Fujioka, Masahiro Kanai, Shotaro Okabe, Yuzo Kohda, Tadashi Hori, Koichiro Moriyama, Hiroyuki Ozaki, Yukito Aota, Atsushi Koike, Mitsuyuki Niwa, Yasuyoshi Takai, Hidetoshi Tsuzuki
  • Publication number: 20090084500
    Abstract: There is disclosed an exhaust processing process of a processing apparatus for processing a substrate or a film, which comprises after the processing of the substrate or the film, introducing a non-reacted gas and/or a by-product into a trap means comprising a filament comprised of a high-melting metal material comprising as a main component at least one of tungsten, molybdenum and rhenium; and processing the non-reacted gas and/or the by-product inside the trap means. This makes it possible to prevent lowering in exhaust conductance, to lengthen the maintenance cycle of the processing apparatus, and to provide a high-quality product (processed substrate or film).
    Type: Application
    Filed: December 2, 2008
    Publication date: April 2, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tadashi Sawayama, Yasushi Fujioka, Masahiro Kanai, Shotaro Okabe, Yuzo Kohda, Tadashi Hori, Koichiro Moriyama, Hiroyuki Ozaki, Yukito Aota, Atsushi Koike, Mitsuyuki Niwa, Yasuyoshi Takai, Hidetoshi Tsuzuki
  • Publication number: 20080014345
    Abstract: There is disclosed an exhaust processing process of a processing apparatus for processing a substrate or a film, which comprises after the processing of the substrate or the film, introducing a non-reacted gas and/or a by-product into a trap means comprising a filament comprised of a high-melting metal material comprising as a main component at least one of tungsten, molybdenum and rhenium; and processing the non-reacted gas and/or the by-product inside the trap means. This makes it possible to prevent lowering in exhaust conductance, to lengthen the maintenance cycle of the processing apparatus, and to provide a high-quality product (processed substrate or film).
    Type: Application
    Filed: July 11, 2007
    Publication date: January 17, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: TADASHI SAWAYAMA, YASUSHI FUJIOKA, MASAHIRO KANAI, SHOTARO OKABE, YUZO KOHDA, TADASHI HORI, KOICHIRO MORIYAMA, HIROYUKI OZAKI, YUKITO AOTA, ATSUSHI KOIKE, MITSUYUKI NIWA, YASUYOSHI TAKAI, HIDETOSHI TSUZUKI
  • Publication number: 20070131170
    Abstract: A plasma CVD apparatus comprises an anode electrode and a cathode electrode, and is for forming a thin film on a substrate by performing plasma discharge between the anode electrode and the cathode electrode, comprising: a substrate holder disposed between the anode electrode and the cathode electrode; and one conductive member disposed between the substrate holder and one electrode of either the anode electrode or the cathode electrode, wherein the substrate holder supports the substrate, the one conductive member is provided between the one electrode and the substrate holder so as to substantially cover an entire space between the one electrode and the substrate holder, and the one conductive member is electrically connected to the one electrode and the substrate holder.
    Type: Application
    Filed: February 1, 2007
    Publication date: June 14, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Akira Shimizu, Yuhsuke Fukuoka, Yasushi Fujioka, Katsushi Kishimoto, Katsuhiko Nomoto
  • Patent number: 7195673
    Abstract: A plasma CVD apparatus comprises an anode electrode and a cathode electrode, and is for forming a thin film on a substrate by performing plasma discharge between the anode electrode and the cathode electrode, comprising: a substrate holder disposed between the anode electrode and the cathode electrode; and one conductive member disposed between the substrate holder and one electrode of either the anode electrode or the cathode electrode, wherein the substrate holder supports the substrate, the one conductive member is provided between the one electrode and the substrate holder so as to substantially cover an entire space between the one electrode and the substrate holder, and the one conductive member is electrically connected to the one electrode and the substrate holder.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: March 27, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akira Shimizu, Yuhsuke Fukuoka, Yasushi Fujioka, Katsushi Kishimoto, Katsuhiko Nomoto
  • Publication number: 20060196536
    Abstract: A thin film solar cell includes: a transparent conductive film arranged on a translucent insulating substrate; first and second separation trenches orthogonal to each other on the translucent insulating substrate and separating the transparent conductive film; and a first opening trench parallel to the first separation trench and second opening trenches parallel to said second separation trench, orthogonal to each other on the translucent insulating substrate; wherein solar cells formed on the translucent insulating substrate are arranged at adjacent positions with said first opening trench positioned therebetween and at adjacent positions with said second opening trench positioned therebetween; pairs of said solar cells adjacent to each other with said first opening trench positioned therebetween are electrically connected, and among pairs of solar cells positioned adjacent to each other with the second opening trench in between, some are electrically connected to each other, and others are electrically insu
    Type: Application
    Filed: March 6, 2006
    Publication date: September 7, 2006
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yasushi Fujioka, Tohru Takeda
  • Patent number: 7032536
    Abstract: A thin film formation apparatus for forming a thin film on a substrate is provided, which comprises: a reaction chamber; a gas introduction section for introducing a reactant gas into the reaction chamber; an evacuation section for exhausting the reactant gas from the reaction chamber; first and second planar electrodes provided in the reaction chamber; first and second support members which respectively support the first and second electrodes in parallel relation; a high frequency power source for applying high frequency power between the first and second electrodes; and a heating section for heating one of the first and second electrodes; wherein the substrate is placed on the heated electrode, and at least one of the first and second electrodes is supported movably in the direction of thermal expansion by the corresponding support member.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: April 25, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yusuke Fukuoka, Yasushi Fujioka, Katsushi Kishimoto, Hiroyuki Fukuda, Katsuhiko Nomoto
  • Publication number: 20050161077
    Abstract: An apparatus for efficiently and continuously mass-producing a photovoltaic element by a plasma CVD method having an excellent current-voltage characteristic and excellent photoelectric conversion efficiency. The apparatus has a first chamber where raw material gas flows from top to bottom. A second chamber is connected to the first chamber by a separating path and causes the raw material gas to flow from bottom to top along the movement direction of the long substrate.
    Type: Application
    Filed: July 23, 2003
    Publication date: July 28, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shotaro Okabe, Yasushi Fujioka, Masahiro Kanai, Akira Sakai, Tadashi Sawayama, Yuzo Kohda, Tadashi Hori, Takahiro Yajima
  • Publication number: 20050022864
    Abstract: To uniformly form a silicon thin film for a solar cell, having an i layer formed with crystalline silicon, on a substrate of a large area to provide a high power solar cell, in a manufacturing method of a silicon thin film solar cell, a silicon thin film, having a structure such that an i layer is sandwiched between a p layer and an n layer, is formed on a substrate with a high frequency plasma CVD method, wherein i layer is formed with crystalline silicon using plasma with pulse-modulated high frequency power, one cycle of pulse modulation includes an ON state for outputting high frequency power and an OFF state for not outputting, an output waveform is modulated to be rectangular, a time of the ON state is 1-100 microseconds, and a time of the OFF state is 5 microseconds or longer.
    Type: Application
    Filed: June 24, 2004
    Publication date: February 3, 2005
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yasushi Fujioka, Akira Shimizu, Hiroyuki Fukuda, Katsuhiko Nomoto
  • Patent number: 6822157
    Abstract: In a thin film solar battery module, a flat glass substrate with non-monocrystal silicon type thin film solar cells formed thereon, a space layer, and a chilled figured glass are sequentially stacked in this order. The chilled figured glass has fine unevenness on at least its incident side surface to achieve an anti-glare effect.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: November 23, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasushi Fujioka
  • Publication number: 20040161533
    Abstract: There is disclosed an exhaust processing process of a processing apparatus for processing a substrate or a film, which comprises after the processing of the substrate or the film, introducing a non-reacted gas and/or a by-product into a trap means comprising a filament comprised of a high-melting metal material comprising as a main component at least one of tungsten, molybdenum and rhenium; and processing the non-reacted gas and/or the by-product inside the trap means. This makes it possible to prevent lowering in exhaust conductance to lengthen the maintenance cycle of the processing apparatus, and to provide a high-quality product (processed substrate or film).
    Type: Application
    Filed: February 12, 2004
    Publication date: August 19, 2004
    Inventors: Tadashi Sawayama, Yasushi Fujioka, Masahiro Kanai, Shotaro Okabe, Yuzo Kohda, Tadashi Hori, Koichiro Moriyama, Hiroyuki Ozaki, Yukito Aota, Atsushi Koike, Mitsuyuki Niwa, Yasuyoshi Takai, Hidetoshi Tsuzuki