Patents Represented by Law Firm Foley & Lardner, Schwartz, Jeffery, Schwaab, Mack, Blumentahal & Evans
  • High dielectric constant type ceramic composition
    Patent number: 4818736
    Abstract: When a portion of the Pb of a Pb(Zn.sub.1/3 Nb.sub.2/3)O.sub.3 -based ceramic composition within the region bounded by lines connecting a, b, c and d points in the ternary composition diagram of the accompanying FIG. 1 is substituted by a small amount of Ba and/or Sr, a high dielectric constant type ceramic composition which has a small temperature coefficient of dielectric constant and which is effective as a material for multilayer ceramic capacitors is obtained.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: April 4, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yohachi Yamashita, Osamu Furukawa, Mitsuo Harata, Takashi Takahashi