Patents by Inventor Yukari MOROFUJI

Yukari MOROFUJI 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: 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
  • 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: 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