Patents by Inventor Hiroshi Mashima

Hiroshi Mashima 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: 11535767
    Abstract: The present invention provides a silver paste containing at least a silver powder, a binder resin, and an organic solvent, wherein the silver powder contains a first silver powder having a D50 of 3.50 to 7.50 ?m and a second silver powder having a D50 of 0.80 to 2.00 ?m, where D50 represents a 50% value of a volume-based cumulative fraction obtained by laser diffraction particle size distribution measurement; a copper content of the whole silver powder is 10 to 5000 ppm by mass; a copper content of the second silver powder is 80 ppm by mass or more; and the first silver powder contains substantially no copper. The present invention provides a silver paste containing a powder in a high concentration and excellent in printability, and provides a silver conductor film that has a high filling factor, a high film density, high electrical conductivity, and excellent migration resistance.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: December 27, 2022
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Kousuke Nishimura, Naoto Shindo, Hiroshi Mashima, Yuji Akimoto
  • Publication number: 20220089894
    Abstract: The present invention provides a silver paste containing at least a silver powder, a binder resin, and an organic solvent, wherein the silver powder contains a first silver powder having a D50 of 3.50 to 7.50 ?m and a second silver powder having a D50 of 0.80 to 2.00 ?m, where D50 represents a 50% value of a volume-based cumulative fraction obtained by laser diffraction particle size distribution measurement; a copper content of the whole silver powder is 10 to 5000 ppm by mass; a copper content of the second silver powder is 80 ppm by mass or more; and the first silver powder contains substantially no copper. The present invention provides a silver paste containing a powder in a high concentration and excellent in printability, and provides a silver conductor film that has a high filling factor, a high film density, high electrical conductivity, and excellent migration resistance.
    Type: Application
    Filed: November 28, 2019
    Publication date: March 24, 2022
    Inventors: Kousuke Nishimura, Naoto Shindo, Hiroshi Mashima, Yuji Akimoto
  • Publication number: 20220089885
    Abstract: The present invention provides a silver paste, containing at least a silver powder, a binder resin, and an organic solvent, in which a content of the silver powder based on the silver paste is 80.00 to 97.00% by mass, D10 is 1.00 to 3.00 ?m and D50 is 3.00 to 7.00 ?m, where D10 and D50 respectively represent a 10% value and a 50% value of a volume-based cumulative fraction obtained by laser diffraction particle size distribution measurement of the silver powder, the silver powder has a specific surface area of 0.10 to 0.30 m2/g, the silver powder has a copper content of 10 to 5000 ppm by mass, a content of the binder resin based on the silver powder is 0.430 to 0.750% by mass, and the silver paste has a dry film density of 7.50 g/cm3 or more.
    Type: Application
    Filed: November 28, 2019
    Publication date: March 24, 2022
    Inventors: Kousuke Nishimura, Naoto Shindo, Hiroshi Mashima
  • Publication number: 20220072607
    Abstract: The present invention provides a silver paste containing at least a silver powder, a binder resin, and an organic solvent, in which a value CBND/SBET is 2.0 to 3.4 where SBET (m2/g) represents a specific surface area of the silver powder, and CBND (% by mass) represents a content percentage of the binder resin based on the silver powder, a copper content of the silver powder is 10 to 5000 ppm by mass, and the silver paste has a dry film density of 7.50 g/cm3 or more. The present invention can provide a silver paste containing a powder in a high concentration and excellent in printability, and accordingly provide a silver conductor film that has a high filling factor and a high film density, exhibits high electrical conductivity, and is excellent in migration resistance.
    Type: Application
    Filed: November 28, 2019
    Publication date: March 10, 2022
    Inventors: Kousuke Nishimura, Naoto Shindo, Hiroshi Mashima
  • Patent number: 11183315
    Abstract: A conductive paste comprising a conductive powder, a glass frit substantially free of lead, and an organic vehicle, wherein the glass frit contains 25 to 50 mol % B in terms of B2O3, 25 to 50 mol % Si in terms of SiO2, 7 to 23 mol % Al in terms of Al2O3, 2 to 15 mol % Mg in terms of MgO, 2 to 5 mol % Ba in terms of BaO, one or two selected from the group consisting of 3 to 18 mol % Zn in terms of ZnO, and 3 to 8 mol % Ti in terms of TiO2, based on the total number of moles in terms of the above oxides. According to the present invention, it is possible to provide a lead-free conductive paste having excellent resistance to dissolution in solder and acid resistance as well as being capable of forming fired films having excellent adherence and adhesion to a substrate.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: November 23, 2021
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Hayato Tateno, Junichi Ikuno, Hiroshi Mashima
  • Publication number: 20210323859
    Abstract: A conductive paste comprising a conductive powder, a glass frit substantially free of lead, and an organic vehicle, wherein the glass frit contains 25 to 50 mol % B in terms of B2O3, 25 to 50 mol % Si in terms of SiO2, 7 to 23 mol % Al in terms of Al2O3, 2 to 15 mol % Mg in terms of MgO, 2 to 5 mol % Ba in terms of BaO, one or two selected from the group consisting of 3 to 18 mol % Zn in terms of ZnO, and 3 to 8 mol % Ti in terms of TiO2, based on the total number of moles in terms of the above oxides. According to the present invention, it is possible to provide a lead-free conductive paste having excellent resistance to dissolution in solder and acid resistance as well as being capable of forming fired films having excellent adherence and adhesion to a substrate.
    Type: Application
    Filed: July 18, 2017
    Publication date: October 21, 2021
    Inventors: Hayato Tateno, Junichi Ikuno, Hiroshi Mashima
  • Patent number: 10901197
    Abstract: The present disclosure provides a medical observation device to achieve improvement in functionality resulting from switching of optical elements and miniaturization of the device. The medical observation device includes: an imaging optical system configured to capture an image of a subject; an image sensor configured to photoelectrically convert the image of the subject captured by the imaging optical system; and an element holding frame configured to hold a plurality of optical elements and to be capable of being rotated around a rotation shaft. An axial direction of the rotation shaft is set to a direction orthogonal to an optical axis direction that is a direction of a line from the imaging optical system to the image sensor, and the element holding frame is rotated and thus at least one of the optical elements among the plurality of optical elements is positioned on an optical axis.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: January 26, 2021
    Assignee: SONY CORPORATION
    Inventors: Ryuhei Azuma, Hiroshi Mashima, Takashi Kato, Takashi Terai, Shintaro Miyatani, Daisuke Ikeda
  • Patent number: 10446290
    Abstract: 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: September 28, 2017
    Date of Patent: October 15, 2019
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Hiroshi Mashima, Yukari Morofuji
  • 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: 10288837
    Abstract: To enable a moving object to be movable even when electromotive driving of the moving object is not possible and prevent inconvenience from occurring during medical procedures.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: May 14, 2019
    Assignee: SONY CORPORATION
    Inventors: Shintaro Miyatani, Takashi Kato, Takashi Terai, Hiroshi Mashima, Ryuhei Azuma, Daisuke Ikeda
  • Publication number: 20180108460
    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: Application
    Filed: December 14, 2017
    Publication date: April 19, 2018
    Inventors: Hiroshi MASHIMA, Yukari MOROFUJI
  • 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
  • Publication number: 20180019037
    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: Application
    Filed: September 28, 2017
    Publication date: January 18, 2018
    Inventors: Hiroshi MASHIMA, Yukari MOROFUJI
  • 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
  • Publication number: 20170285297
    Abstract: To enable a moving object to be movable even when electromotive driving of the moving object is not possible and prevent inconvenience from occurring during medical procedures.
    Type: Application
    Filed: July 29, 2015
    Publication date: October 5, 2017
    Inventors: SHINTARO MIYATANI, TAKASHI KATO, TAKASHI TERAI, HIROSHI MASHIMA, RYUHEI AZUMA, DAISUKE IKEDA
  • Publication number: 20170285321
    Abstract: To achieve improvement in functionality resulting from switching of optical elements and miniaturization of the device. A medical observation device includes: an imaging optical system configured to capture an image of a subject; an image sensor configured to photoelectrically convert the image of the subject captured by the imaging optical system; and an element holding frame configured to hold a plurality of optical elements and to be capable of being rotated around a rotation shaft. An axial direction of the rotation shaft is set to a direction orthogonal to an optical axis direction that is a direction of a line from the imaging optical system to the image sensor, and the element holding frame is rotated and thus at least one of the optical elements among the plurality of optical elements is positioned on an optical axis.
    Type: Application
    Filed: July 29, 2015
    Publication date: October 5, 2017
    Inventors: RYUHEI AZUMA, HIROSHI MASHIMA, TAKASHI KATO, TAKASHI TERAI, SHINTARO MIYATANI, DAISUKE IKEDA
  • Publication number: 20170062091
    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: Application
    Filed: August 20, 2015
    Publication date: March 2, 2017
    Inventors: Hiroshi MASHIMA, Yukari MOROFUJI
  • 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
  • Patent number: 8931432
    Abstract: A vacuum processing apparatus is provided, in which a deposition characteristic is easily adjusted, and occurrence of difference in deposition characteristic between deposition chambers can be suppressed, and reduction in equipment cost can be achieved, and a deposition method using the vacuum processing apparatus is provided.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: January 13, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Keisuke Kawamura, Hiroshi Mashima
  • Patent number: 8481848
    Abstract: A large surface area photovoltaic device having high conversion efficiency and excellent mass productivity is provided. A photovoltaic device 100 having a photovoltaic layer 3 comprising a crystalline silicon layer formed on a substrate 1, wherein the crystalline silicon layer has a crystalline silicon i-layer 42, and the crystalline silicon i-layer 42 has a substrate in-plane distribution represented by an average value for the Raman peak ratio, which represents the ratio of the Raman peak intensity for the crystalline silicon phase relative to the Raman peak intensity for the amorphous silicon phase, that is not less than 4 and not more than 8, a standard deviation for the Raman peak ratio that is not less than 1 and not more than 3, and a proportion of regions in which the Raman peak ratio is not more than 4 of not less than 0% and not more than 15%.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: July 9, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Saneyuki Goya, Eishiro Sasakawa, Hiroshi Mashima, Satoshi Sakai