Patents Assigned to Shoei Chemical Inc.
  • Patent number: 10403421
    Abstract: A thick film resistor excluding a toxic lead component from a conductive component and glass and having characteristics equivalent to or superior to conventional resistors in terms of, in a wide resistance range, resistance values, TCR characteristics, current noise characteristics, withstand voltage characteristics and the like. The thick film resistor is formed of a fired product of a resistive composition, wherein the thick film resistor contains ruthenium-based conductive particles containing ruthenium dioxide and a glass component essentially free of a lead component and has a resistance value in the range of 100 ?/? to 10 M?/? and a temperature coefficient of resistance within ±100 ppm/° C.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: September 3, 2019
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Hiroshi Mashima, Yukari Morofuji
  • Patent number: 10392535
    Abstract: A binder resin for an inorganic particle-dispersed paste that excels in both printability and adhesiveness and such an inorganic particle-dispersed paste are provided. The resin includes a mixture in which a polyvinyl acetal and a cellulose derivative are mixed so as to satisfy 0.2?X/(X+Y)?0.8, where X and Y stand for parts by mass of the polyvinyl acetal and the cellulose derivative, respectively. When a paste is formulated by mixing and kneading the resin with spherical nickel particles with an average particle diameter of 0.3 ?m, barium titanate particles with an average particle diameter of 0.05 ?m, a nonionic surfactant, dihydroterpineol, and mineral spirit at the prescribed mixing ratio, the paste has prescribed rheological characteristics.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: August 27, 2019
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Takamasa Imai, Seiyu Teruya, Kousuke Nishimura
  • Patent number: 10347787
    Abstract: A conductive paste for forming a solar cell electrode, including: a conductive powder containing silver as a main component; glass frit; and an organic vehicle, wherein the glass frit contains tellurium glass frit having tellurium oxide as a network-forming component. The conductive paste of the present invention makes it possible to form a solar cell electrode having a low dependence on firing temperature without causing problems due to fire-through into the substrate, and to thereby obtain a solar cell having good solar cell characteristics.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: July 9, 2019
    Assignees: Shoei Chemical Inc., Heraeus Precious Metals North American Conshohocken LLC
    Inventors: Masami Nakamura, Naoto Shindo, Tadashi Kanasaku
  • Patent number: 10249774
    Abstract: A conductive paste for forming solar cell electrodes that obtains favorable electrical characteristics and sufficient adhesion strength to a substrate. The conductive paste for forming a solar cell electrode includes the following: a tellurium-based glass frit containing 30-70 mol % of tellurium, 15-40 mol % of tungsten, 5-30 mol % of zinc, 0-20 mol % of boron, and 0-10 mol % of zirconium (where a total content of boron and zirconium is greater than 0 mol %) in terms of oxides; a conductive powder having silver as a main component and specific surface area of 0.4 m2/g or more; and an organic vehicle.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: April 2, 2019
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Tadashi Kanasaku, Kousuke Nishimura, Masayuki Kurahashi
  • Publication number: 20190032241
    Abstract: A method for producing a metal oxide nanocrystals according to the embodiment of the present invention comprises continuously flowing a nanocrystal precursor solution comprising a nanocrystal precursor into a continuous flow path and heating the nanocrystal precursor solution in the continuous flow path to create nanocrystals, comprising: providing a nanocrystal precursor solution supply unit that is connected to the continuous flow path and comprises a first vessel and a second vessel; delivering a nanocrystal precursor solution in the second vessel to the continuous low path; and creating a nanocrystal precursor solution in the first vessel as a different batch from the nanocrystal precursor solution in the second vessel.
    Type: Application
    Filed: July 22, 2016
    Publication date: January 31, 2019
    Applicant: Shoei Chemical Inc.
    Inventors: Thomas E. Novet, Yukihisa Okawa, Masahito Igari, David M. Schut
  • Publication number: 20180371638
    Abstract: A method for producing metal oxide nanocrystals, according to the embodiment of the present invention, includes: continuously flowing, into a continuous flow path, one or a plurality of nanocrystal precursor solutions each comprising one or more nanocrystal precursors dissolved in a non-polar solvent; directing a segmenting gas into the continuous flow path to create a segmented reaction flow; flowing the segmented reaction flow into a thermal processor; heating the segmented reaction flow in the thermal processor to create a product flow; and collecting metal oxide nanocrystals from the product flow.
    Type: Application
    Filed: July 22, 2016
    Publication date: December 27, 2018
    Applicant: Shoei Chemical Inc.
    Inventors: Thomas E. Novet, Yukihisa Okawa, Masahito Igari, David M. Schut
  • Patent number: 10084100
    Abstract: A solar cell element containing: a semiconductor substrate; an antireflection film disposed in a first region on one main surface of the semiconductor substrate; and a front surface electrode disposed in a second region on the one main surface of the semiconductor substrate and containing silver as a main component and a tellurium-based glass containing tellurium, tungsten, and bismuth. The solar cell element is manufactured by forming the antireflection film on the one main substrate surface; printing on the antireflection film a conductive paste containing a conductive powder mainly containing silver, a tellurium-based glass frit containing tellurium, tungsten, and bismuth, and an organic vehicle; and disposing the antireflection film in the first region and forming the front surface electrode in the second region, by firing the paste and eliminating the antireflection film positioned under the paste.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: September 25, 2018
    Assignees: SHOEI CHEMICAL INC., KYOCERA CORPORATION
    Inventors: Masami Nakamura, Naoto Shindo, Tadashi Kanasaku, Junichi Atobe
  • Patent number: 9943909
    Abstract: A carbon-coated metal powder having few impurities, a narrower particle size distribution, and sintering properties is particularly suitable as a conductive powder of a conductive paste for forming internal conductors in a ceramic multilayer electronic component obtained by co-firing multilayered ceramic sheets and internal conductor layers; a conductive paste containing the carbon-coated metal powder; a multilayer electronic component using the conductive paste; and a method for manufacturing the carbon-coated metal powder. The carbon-coated metal powder has specific properties in TMA or ESCA measurements. The carbon-coated metal powder can be obtained by melting and vaporizing a metallic raw material in a reaction vessel, conveying the generated metal vapor into a cooling tube and rapidly cooling the metal vapor by endothermically decomposing a carbon source supplied into the cooling tube, and forming a carbon coating film on metal nuclei surfaces in parallel with generation of the metal nuclei.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: April 17, 2018
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Yuji Akimoto, Hideki Tanaka, Mineto Iwasaki, Akiko Matsuo
  • Patent number: 9892828
    Abstract: A thick film resistor excluding a toxic lead component from a conductive component and glass and having characteristics equivalent to or superior to conventional resistors in terms of, in a wide resistance range, resistance values, TCR characteristics, current noise characteristics, withstand voltage characteristics and the like. The thick film resistor is formed of a fired product of a resistive composition, wherein the thick film resistor contains ruthenium-based conductive particles containing ruthenium dioxide and a glass component essentially free of a lead component and has a resistance value in the range of 100?/? to 10 M?/? and a temperature coefficient of resistance within ±100 ppm/° C.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: February 13, 2018
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Hiroshi Mashima, Yukari Morofuji
  • Patent number: 9845397
    Abstract: A method for producing a binder resin by a reaction of a cellulose derivative, a polyvinyl acetal, and a bonding agent that has in the molecule at least two functional groups that can react to hydroxyl groups in the polyvinyl acetal and the cellulose derivative. In the production method, the content of the bonding agent is at least double the molar quantity of whichever has the greater number of moles between the polyvinyl acetal and the cellulose derivative. The produced binder resin is favorable in a coating paste such as a conductive paste, and causes an improvement in film quality such as the smoothness and denseness of a coating film formed by the paste.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: December 19, 2017
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Ryojiro Akashi, Tomoko Uchida
  • Publication number: 20170352773
    Abstract: A conductive paste for forming a solar cell electrode, including: a conductive powder containing silver as a main component; glass frit; and an organic vehicle, wherein the glass frit contains tellurium glass frit having tellurium oxide as a network-forming component. The conductive paste of the present invention makes it possible to form a solar cell electrode having a low dependence on firing temperature without causing problems due to fire-through into the substrate, and to thereby obtain a solar cell having good solar cell characteristics.
    Type: Application
    Filed: August 24, 2017
    Publication date: December 7, 2017
    Applicants: SHOEI CHEMICAL INC., HERAEUS PRECIOUS METALS NORTH AMERICA CONSHOHOCKEN LLC
    Inventors: Masami NAKAMURA, Naoto SHINDO, Tadashi KANASAKU
  • Patent number: 9805839
    Abstract: An object of the present invention is to provide a resistive composition that can form a thick film resistor excluding a toxic lead component from a conductive component and glass and having characteristics equivalent to or superior to conventional resistors in terms of, in a wide resistance range, resistance values, TCR characteristics, current noise characteristics, withstand voltage characteristics and the like. The resistive composition of the present invention includes: ruthenium-based conductive particles including ruthenium dioxide; a glass frit that is essentially free of a lead component; and an organic vehicle, wherein the glass frit is a glass frit which is constituted such that in a case where a fired product of a mixture of the glass frit and the ruthenium dioxide has in a range of 1 k?/? to 1 M?/?, the fired product exhibits a temperature coefficient of resistance in a plus range.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: October 31, 2017
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Hiroshi Mashima, Yukari Morofuji
  • Patent number: 9561543
    Abstract: A method for manufacturing metal powder includes: melting at least a portion of a metal starting material in a reaction vessel by utilizing plasma so as to form molten metal; evaporating the molten metal so as to produce a metal vapor; and transferring the metal vapor from the reaction vessel to a cooling tube together with a carrier gas supplied into the reaction vessel so as to cool the metal vapor, and condensing the metal vapor in the cooling tube, thereby producing metal powder. The method further includes supplying an oxygen gas into the reaction vessel.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: February 7, 2017
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Fumiyuki Shimizu, Masayuki Maekawa, Tomotaka Nishikawa
  • Publication number: 20170011825
    Abstract: An object of the present invention is to provide a thick film resistor excluding a toxic lead component from a conductive component and glass and having characteristics equivalent to or superior to conventional resistors in terms of, in a wide resistance range, resistance values, TCR characteristics, current noise characteristics, withstand voltage characteristics and the like. The present invention is a thick film resistor formed of a fired product of a resistive composition, wherein the thick film resistor contains ruthenium-based conductive particles containing ruthenium dioxide and a glass component being essentially free of a lead component and has a resistance value in the range of 100 ?/? to 10 M?/? and a temperature coefficient of resistance within ±100 ppm/° C.
    Type: Application
    Filed: August 20, 2015
    Publication date: January 12, 2017
    Applicant: Shoei Chemical Inc.
    Inventors: Hiroshi MASHIMA, Yukari MOROFUJI
  • Publication number: 20160284889
    Abstract: A conductive paste for a solar cell element front surface electrode that is used to form a front surface electrode of a solar cell element that is provided with a semiconductor substrate, an antireflective film disposed in a first region on one main surface of the semiconductor substrate, and a front surface electrode disposed in a second region on the one main surface of the semiconductor substrate. The conductive paste contains a conductive powder, a mixed glass frit, and an organic vehicle in which the mixed glass frit contains, in the form of mixture, a tellurium-based glass frit containing tellurium, tungsten, and bismuth as essential components and a lead-bismuth-based glass frit that contains lead and bismuth as essential components and that substantially does not contain tellurium.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 29, 2016
    Applicant: Shoei Chemical Inc.
    Inventors: Yuji AKIMOTO, Tadashi KANASAKU, Kousuke NISHIMURA, Yoshio MIURA
  • Patent number: 9375789
    Abstract: A plasma device for production of metal powder includes a reaction vessel, a plasma torch, a carrier gas supply unit and a cooling tube. A metal starting material is supplied to the vessel. The torch produces plasma between the torch and the metal starting material to evaporate the metal starting material and produce a metal vapor. The supply unit supplies into the vessel a carrier gas for carrying the metal vapor. The cooling tube is provided with indirect and direct cooling sections and cools the metal vapor transferred from the vessel to produce the metal powder. The metal vapor and/or the metal powder are indirectly cooled in the indirect cooling section and directly cooled in the direct cooling section. A projection and/or a recess are disposed at least on a part of an inner wall of the indirect cooling section.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: June 28, 2016
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Fumiyuki Shimizu, Masayuki Maekawa, Shusaku Kawaguchi
  • Patent number: 9379379
    Abstract: A cathode material for a lithium ion secondary battery is a composite grain including an oxide and a carbon material. The oxide includes, as constituent elements, Li, Si and at least one of Fe and Mn. According to a measurement by an X-ray diffraction method using Cu-K? as an X-ray source, a diffraction peak exists within a range of 2?=33±2° and a half width of the diffraction peak is 0.55° or more. A size of the grain is 1 ?m or more and 20 ?m or less.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: June 28, 2016
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Masahiko Miyahara, Atsushi Nemoto, Hirokazu Sasaki
  • Patent number: 9379413
    Abstract: An electrolyte solvent for a cathode active material composed of lithium oxo acid salt. The solvent is used for a lithium ion secondary battery using the lithium oxo acid salt as a cathode material. The electrolyte solvent includes an ammonium ion which includes two or more alkoxyalkyl groups.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: June 28, 2016
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Li Yang, Shaohua Fang
  • Patent number: 9287054
    Abstract: Provided is a solid electrolytic capacitor element which is reduced in ESR deterioration due to thermal shock and suppressed in variation in ESR changes, while having good initial characteristics of ESR. This solid electrolytic capacitor element is provided, on the surface of an anode body, with at least a dielectric layer, a solid electrolyte layer, a carbon layer that contains a first resin component and a conductive layer that contains a second resin component. Both of the first resin component and the second resin component have a hydroxyl group, and the difference ??h (=?h2??h1) between the hydrogen-bonding component value ?h1 [mN/m] of the carbon layer surface and the hydrogen-bonding component value ?h2 [mN/m] of the conductive layer surface is within the range of ?3???h?3 [mN/m].
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: March 15, 2016
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Takashi Endo, Tomeji Ohno, Masami Akagi, Tomoko Uchida
  • Patent number: 9246172
    Abstract: A cathode material for a lithium ion secondary battery includes an oxide represented by a composition formula Li2-xMIIyM(Si,MB)O4, wherein MII represents a divalent element; M represents at least one element selected from the group consisting of Fe, Mn, Co and Ni; and MB represents, as an optional component, an element substituted for Si to compensate for a difference between an electric charge of [Li2]2+ and an electric change of [Li2-xMIIy]n+ as needed. In the composition formula representing the oxide, x and y are ?0.25<x?0.25 and 0<y?0.25.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: January 26, 2016
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Hirokazu Sasaki, Atsushi Nemoto, Masahiko Miyahara