The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2002
Filed:
Jul. 26, 2000
Toshihiro Okamatsu, Moriyama, JP;
Tomoyuki Nakamura, Shiga-ken, JP;
Kenji Hori, Shiga-ken, JP;
Kotaro Hata, Shiga-ken, JP;
Harunobu Sano, Kyoto, JP;
Abstract
A dielectric ceramic composition comprises a compound oxide comprising barium titanate Ba TiO as a major component and RO , CaO, MgO, and SiO , as accessory components, wherein R is at least one element selected from the group consisting of Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb, wherein the compound oxide satisfies the following relationship: 100Ba TiO +aRO +bCaO+cMgO+dSiO , wherein, on a molar basis, 0.990≦m≦1.030, 0.5≦a≦6.0, 0.10≦b≦5.00, 0.010≦c<1.000, and 0.05 ≦d<2.00. The dielectric ceramic composition satisfies the B characteristic defined by the Japanese Industrial Standard (JIS) and the X7R characteristic defined by the EIA standard with respect to dependence of electrostatic capacitance on temperature, and has a large CR product of the insulation resistance and the electrostatic capacitance. A monolithic ceramic capacitor which includes thin dielectric layers composed of this dielectric ceramic composition is highly reliable.