Patents by Inventor Kazutaka Uda

Kazutaka Uda 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: 8835253
    Abstract: Provided is a photoelectric conversion device fabrication method in which current leakage from an intermediate contact layer via an intermediate-contact-layer separating groove is prevented as much as possible. Included are a step of film-forming a top layer having amorphous silicon as a main component; a step of film-forming, on the top layer, an intermediate contact layer electrically and optically connected thereto; a step of separating the intermediate contact layer by removing the intermediate contact layer by irradiating it with a pulsed laser, forming an intermediate-contact-layer separating groove that reaches the top layer; and a step of film-forming, on the intermediate contact layer and inside the intermediate-contact-layer separating groove, a bottom layer electrically and optically connected thereto and having microcrystalline silicon as a main component. A pulsed laser having a pulse width of 10 ps to 750 ps, inclusive, is used as the pulsed laser for separating the intermediate contact layer.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tatsuyuki Nishimiya, Kazutaka Uda, Kohei Kawazoe, Tomoyoshi Baba, Takashi Ishide
  • Patent number: 8692153
    Abstract: Provided is a method for manufacturing a photoelectric-conversion-device capable of controlling the groove depth of a processed groove to a desired value. The method for manufacturing a photoelectric conversion device (10) includes a groove forming step of irradiating an intermediate-contact-layer separating groove (15) constituting a photoelectric conversion device (10) with a picosecond laser and of moving the picosecond laser relative to the intermediate-contact-layer separating groove (93), thereby forming a processed groove (15) in a predetermined scanning direction. In the groove forming step, interference fringes arranged in parallel in one direction are formed in an irradiated area corresponding to a beam diameter of the picosecond laser, and the picosecond laser is relatively moved such that the interference fringes are joined in the scanning direction.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: April 8, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kohei Kawazoe, Kazutaka Uda, Tomoyoshi Baba, Takashi Ishide, Sachiko Nakao
  • Publication number: 20110226748
    Abstract: Provided is a method for manufacturing a photoelectric-conversion-device capable of controlling the groove depth of a processed groove to a desired value. The method for manufacturing a photoelectric conversion device (10) includes a groove forming step of irradiating an intermediate-contact-layer separating groove (15) constituting a photoelectric conversion device (10) with a picosecond laser and of moving the picosecond laser relative to the intermediate-contact-layer separating groove (93), thereby forming a processed groove (15) in a predetermined scanning direction. In the groove forming step, interference fringes arranged in parallel in one direction are formed in an irradiated area corresponding to a beam diameter of the picosecond laser, and the picosecond laser is relatively moved such that the interference fringes are joined in the scanning direction.
    Type: Application
    Filed: August 25, 2009
    Publication date: September 22, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kohei Kawazoe, Kazutaka Uda, Tomoyoshi Baba, Takashi Ishide, Sachiko Nakao
  • Publication number: 20110203630
    Abstract: A photovoltaic device that can prevent performance degradation caused by electrodeposition generated as a result of moisture penetration. In the photovoltaic device, two or more intermediate insulation portions that electrically insulate solar cell unit cells positioned adjacently in the X-direction are formed on the substrate center side of side insulation portions so as to extend in the Y-direction in a parallel arrangement across the X-direction, a conductive portion that electrically connects solar cell unit cells positioned adjacently in the X-direction is provided in a position partway along each of the intermediate insulation portions, and the solar cell unit cells where the conductive portion is positioned are electrically insulated from a solar cell unit cell positioned adjacently in the X-direction by another of the intermediate insulation portions positioned distant from the conductive portion in the X-direction.
    Type: Application
    Filed: August 14, 2007
    Publication date: August 25, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akemi Takano, Tatsuji Horioka, Satoshi Kokaji, Kazutaka Uda
  • Publication number: 20110126895
    Abstract: Provided is a method for fabricating a photoelectric conversion device in which current is prevented as much as possible from leaking via an intermediate contact layer separating groove. The method includes: a process of forming a top layer mainly containing amorphous silicon; a process of forming on the top layer an intermediate contact layer electrically and optically connected to the top layer; a process of removing the intermediate contact layer through irradiation with a pulsed laser and forming an intermediate contact layer separating groove that reaches the top layer to separate the intermediate contact layer; and a process of forming, on the intermediate contact layer and in the intermediate contact layer separating groove, a bottom layer that mainly contains microcrystalline silicon and that is electrically and optically connected to the intermediate contact layer. The intermediate contact layer separating groove is terminated in an i-layer of the top layer.
    Type: Application
    Filed: October 2, 2009
    Publication date: June 2, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazutaka Uda, Tomoyoshi Baba, Takashi Ishide, Kohei Kawazoe, Tatsuyuki Nishimiya
  • Publication number: 20110126894
    Abstract: Provided is a photoelectric conversion device fabrication method in which current leakage from an intermediate contact layer via an intermediate-contact-layer separating groove is prevented as much as possible. Included are a step of film-forming a top layer having amorphous silicon as a main component; a step of film-forming, on the top layer, an intermediate contact layer electrically and optically connected thereto; a step of separating the intermediate contact layer by removing the intermediate contact layer by irradiating it with a pulsed laser, forming an intermediate-contact-layer separating groove that reaches the top layer; and a step of film-forming, on the intermediate contact layer and inside the intermediate-contact-layer separating groove, a bottom layer electrically and optically connected thereto and having microcrystalline silicon as a main component. A pulsed laser having a pulse width of 10 ps to 750 ps, inclusive, is used as the pulsed laser for separating the intermediate contact layer.
    Type: Application
    Filed: October 2, 2009
    Publication date: June 2, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tatsuyuki Nishimiya, Kazutaka Uda, Kohei Kawazoe, Tomoyoshi Baba, Takashi Ishide
  • Patent number: 5048336
    Abstract: A moisture-sensitive device comprising a substrate such as silicon substrate, a pair of belt-like heating elements extending over recesses formed in the substrate, the heating elements being composed of a resistive film of platinum or nickel and a heat-resistant insulating film covering the resistive film in which one of the heating elements acts as a detector element and the other as a reference element, which device can exactly determine an absolute humidity irrespective of sudden changes of temperature.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: September 17, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Sugihara, Kazutaka Uda, Hiroki Tabuchi, Shuji Miyoshi, Yasuhiko Inami, Nobuo Hashizume, Hisatoshi Furubayashi
  • Patent number: 4928513
    Abstract: A sensor having a pair of sensor units, one of which is a detecting sensor unit and the other of which is a reference sensor unit, wherein each of the units comprises a substrate with a hollow portion, a thin insulating layer with a bridge, cantilever or diaphragm shape disposed on the substrate, a sensitive film disposed on the bridge, cantilever or diaphragm portion of the thin insulating layer, and a pair of electrodes being in contact with the sensitive film, the sensitive film section of the detecting sensor unit being exposed to an atmosphere to be measured so that the electrical resistance of the sensitive film changes with a variation in the physical quantity of the atmosphere to be detected, and the sensitive film section of the reference sensor unit being sealed within a shielding container so that the electrical resistance of the sensitive film is not influenced by a variation in the physical quantity of the atmosphere outside of the container, whereby the absolute physical quantity of the atmosphe
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: May 29, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Sugihara, Kazutaka Uda, Hiroki Tabuchi, Yasuhiko Inami, Masaya Hijikigawa, Shoei Kataoka
  • Patent number: 4859060
    Abstract: A variable interferometric device comprising a Fabry-Perot interferometer composed of a pair of reflecting substances facing each other with a space therebetween formed by spacers and a means for deforming at least one of the reflecting substances constituting said Fabry-Perot interferometer to thereby change the interferometric characteristics of said Fabry-Perot interferometer.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: August 22, 1989
    Assignee: 501 Sharp Kabushiki Kaisha
    Inventors: Masayuki Katagiri, Masanori Watanabe, Kazutaka Uda, Masaya Hijikigawa, Shuhei Tsuchimoto, Yasuhiko Inami
  • Patent number: 4773935
    Abstract: A moisture sensitive material prepared by cross-linking cellulose acetate butyrate with at least one compound selected from the group consisting of compounds containing two or more isocyanate groups; copmpounds containing two or more epoxy groups; compounds containing two or more carboxyl groups; and acid anhydrides of carboxylic acids.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: September 27, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazutaka Uda, Masaya Hijikigawa
  • Patent number: 4682500
    Abstract: A pressure sensitive element having a pair of light reflecting thin films formed through a thin film producing process and composing a Fabry-Perot resonator which is arranged so as to face a light transmitting system, and a diaphragm laminated on the light reflecting thin films, wherein an optical path difference is formed in accordance with an interval of an air gap located between the pairs of light reflecting thin films, while the interval of the air gap changes by the deformation of the diaphragm.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: July 28, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kazutaka Uda