Patents by Inventor Kazutaka Ozawa

Kazutaka Ozawa 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: 9445519
    Abstract: A method of manufacturing a thick-film electrode comprising steps of: (a) applying a conductive paste onto a substrate comprising, (i) 100 parts by weight of a conductive powder, wherein the conductive powder is 16 to 49 weight percent based on the weight of the conductive paste; (ii) 0.5 to 10 parts by weight of a metal additive comprising bismuth (Bi); (iii) 1 to 25 parts by weight of a glass frit; and (iv) 50 to 300 parts by weight of an organic medium; and (b) firing the applied conductive paste to form the thick-film electrode, wherein thickness of the thick-film electrode is 0.5 to 15 ?m.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: September 13, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Kazushige Ito, Kazutaka Ozawa
  • Patent number: 8916069
    Abstract: The present invention is directed to an electrically conductive composition comprising (a) an electrically conductive metal; (b) a Rh-containing component; (c) a Pb—Te—O; and (d) an organic medium; wherein the electrically conductive metal, the Rh-containing compound, and the Pb—Te—O are dispersed in the organic medium. The present invention is further directed to an electrode formed from the composition and a semiconductor device and, in particular, a solar cell comprising such an electrode. Also provided is a process for forming such an electrode. The electrodes provide good adhesion and good electrical performance.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: December 23, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Kazutaka Ozawa, Lai-Ching Chou
  • Patent number: 8815638
    Abstract: A method of manufacturing a thick-film electrode comprising the steps of: applying onto a substrate a conductive paste comprising a conductive powder, a glass frit, 3.5 to 12.5 weight percent of an organic polymer, and a solvent, wherein the weight percent is based on the total weight of the conductive powder, the glass frit, and the organic polymer; firing the applied conductive paste to form the thick-film electrode, wherein thickness of the thick-film electrode is 1 to 10 ?m; and soldering a wire to the thick-film electrode.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: August 26, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventor: Kazutaka Ozawa
  • Patent number: 8808581
    Abstract: The present invention is directed to an electrically conductive composition comprising (i) an electrically conductive metal, (ii) a component selected from the group consisting of Li2RuO3, ion-exchanged Li2RuO3 and mixtures thereof, and (iii) a glass frit all dispersed in an organic medium. The present invention is further directed to an electrode formed from the composition and a semiconductor device and, in particular, a solar cell comprising such an electrode. The electrodes provide good adhesion and good electrical performance.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: August 19, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Paul Douglas Vernooy, Chieko Kikuchi, Kazutaka Ozawa
  • Publication number: 20140196781
    Abstract: A method of manufacturing a thick-film electrode comprising steps of: (a) applying a conductive paste onto a substrate comprising, (i) 100 parts by weight of a conductive powder, wherein the conductive powder is 16 to 49 weight percent based on the weight of the conductive paste; (ii) 0.5 to 10 parts by weight of a metal additive comprising bismuth (Bi); (iii) 1 to 25 parts by weight of a glass frit; and (iv) 50 to 300 parts by weight of an organic medium; and (b) firing the applied conductive paste to form the thick-film electrode, wherein thickness of the thick-film electrode is 0.5 to 15 ?m.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Kazushige ITO, Kazutaka OZAWA
  • Publication number: 20130337604
    Abstract: A method of manufacturing a thick-film electrode comprising the steps of: applying onto a substrate a conductive paste comprising a conductive powder, a glass frit, 3.5 to 12.5 weight percent of an organic polymer, and a solvent, wherein the weight percent is based on the total weight of the conductive powder, the glass frit, and the organic polymer; firing the applied conductive paste to form the thick-film electrode, wherein thickness of the thick-film electrode is 1 to 10 ?m; and soldering a wire to the thick-film electrode.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 19, 2013
    Inventor: KAZUTAKA OZAWA
  • Publication number: 20130043441
    Abstract: The present invention is directed to an electrically conductive composition comprising (a) an electrically conductive metal; (b) a Rh-containing component; (c) a Pb—Te—O; and (d) an organic medium; wherein the electrically conductive metal, the Rh-containing compound, and the Pb—Te—O are dispersed in the organic medium. The present invention is further directed to an electrode formed from the composition and a semiconductor device and, in particular, a solar cell comprising such an electrode. Also provided is a process for forming such an electrode. The electrodes provide good adhesion and good electrical performance.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 21, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: KAZUTAKA OZAWA, Lai-Ching Chou
  • Publication number: 20130043440
    Abstract: The present invention is directed to an electrically conductive composition comprising (i) an electrically conductive metal, (ii) a component selected from the group consisting of Li2RuO3, ion-exchanged Li2RuO3 and mixtures thereof, and (iii) a glass frit all dispersed in an organic medium. The present invention is further directed to an electrode formed from the composition and a semiconductor device and, in particular, a solar cell comprising such an electrode. The electrodes provide good adhesion and good electrical performance.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 21, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Paul Douglas Vernooy, Chieko Kikuchi, Kazutaka Ozawa
  • Publication number: 20120207465
    Abstract: A dustproof structure includes: at least one fixed member disposed in an immobile manner; and a rotating member rotatable relative to the fixed member, wherein a clearance is formed between the fixed member and the rotating member, the clearance communicating with an external space positioned outside the fixed member and the rotating member and with an internal space positioned between the fixed member and the rotating member and extending in the direction in which the rotating member is rotated, and a plurality of recesses are formed in the fixed member, the recesses positioned in the internal space, extending in the rotating direction, and arranged in a direction other than the rotating direction.
    Type: Application
    Filed: January 11, 2012
    Publication date: August 16, 2012
    Applicant: Sony Corporation
    Inventors: Kazutaka OZAWA, Tsuyoshi Kanai
  • Patent number: 5986639
    Abstract: An information processing system having a screen display device and an input device with an improved operability in selecting a reactive area, i.e., an icon, on the screen using the input device. When a user clicks a mouse button with a mouse cursor positioned outside a reactive area displayed on a screen, the reactive area is extended and an extended portion is displayed. If the mouse cursor is moved into the extended portion and the mouse button is clicked, a process corresponding to the original reactive area is activated and the extended display is cancelled.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: November 16, 1999
    Assignee: Fujitsu Ltd.
    Inventors: Kazutaka Ozawa, Satoshi Ito