Patents Assigned to Tanaka Matthey Co.
  • Thick film resistor material and thermal head obtained therefrom
    Patent number: 5109238
    Abstract: A thermal head obtained by calcining a mixed material comprising at least ruthenium oxide particles having specific surface area of 10 to 45 m.sup.2 /g and a particle size of 1 .mu.m as the upper limit value of particle size distribution, glass fine particles and a dispersant which disperses these fine particles and disappears by calcining can reduce scattering of resistance values and give high image quality at thermal printing.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: April 28, 1992
    Assignees: Hitachi, Ltd., Tanaka Matthey Co.
    Inventors: Michihiro Watanabe, Kazutaka Sato, Munetoshi Zen, Kazuhiko Ato, Yoshinobu Watanabe, Sadayoshi Taguchi
  • Thick film resistor material and thermal head obtained therefrom
    Patent number: 5021194
    Abstract: A thermal head obtained by calcining a mixed material comprising at least ruthenium oxide particles having a specific surface area of 10 to 40 m.sup.2 /g and a particle size of 1 .mu.m as the upper limit value of particle size distribution, glass fine particles and a dispersant which disperses these fine particles and disappears by calcining can reduce scattering of resistance values and give high image quality at thermal printing.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: June 4, 1991
    Assignees: Hitachi, Ltd., Tanaka Matthey Co., Ltd.
    Inventors: Michihiro Watanabe, Kazutaka Sato, Munetoshi Zen, Kazuhiko Ato, Yoshinobu Watanabe, Sadayoshi Taguchi