Patents by Inventor Matsato Nagano

Matsato Nagano 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).

  • Ceramic, circuit substrate and electronic circuit substrate by use thereof and process for producing ceramic
    Patent number: 5102719
    Abstract: The present invention provides a ceramic having a first region comprising a dielectric porcelain having an insulating layer at the crystal grain boundary of a semiconductor porcelain containing 0.50 to 5.30 mol parts of MnO.sub.2 and 0.02 to 0.40 mol parts of Y.sub.2 O.sub.3 per 100 mol parts of the principal components comprising 49.50 to 54.00 mol % of TiO.sub.2 and 50.50 to 46.00 mol % of SrO, and a second region comprising a dielectric porcelain containing further 0.40 to 5.00 mol parts of MgO and 0.05 to 2.00 mol parts of SiO.sub.2 per 100 mol parts of the principal components in addition to the composition of the first region, and also provides a circuit substrate and an electronic circuit substrate using the same ceramic.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: April 7, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Motoo Kumagai, Keiichi Kato, Matsato Nagano, Michiaki Sakaguchi