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:
Sep. 14, 2010
Filed:
Aug. 26, 2009
Takehisa Sasabayashi, Echizen, JP;
Tomoyuki Nakamura, Moriyama, JP;
Takayuki Yao, Higashiomi, JP;
Masayuki Ishihara, Yasu, JP;
Takehisa Sasabayashi, Echizen, JP;
Tomoyuki Nakamura, Moriyama, JP;
Takayuki Yao, Higashiomi, JP;
Masayuki Ishihara, Yasu, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A dielectric ceramic represented by a general formula: 100BaTiO+aRO+bMO+cXO(where R represents a rare earth element, M represents a predetermined metal element, and n, v, and w represent independently a positive number determined in accordance with the valences of the elements R and M and a sintering aid component X, respectively), and the solid solution regions of the secondary components in the main phase grains are 10% or less (including 0%) on average in terms of a cross-sectional area ratio. The sintering aid component X contains at least Si, and m, a, b, and c satisfy 0.995≦m≦1.030, 0.1≦a≦2.0, 0.1≦b≦3.0, and 0.1≦c≦5.0. In a monolithic ceramic capacitor, dielectric layers are formed from the above-described dielectric ceramic. Consequently, a dielectric ceramic having a good AC voltage characteristic, maintaining a desired large dielectric constant and a good temperature characteristic, exhibiting a small dielectric loss, and being capable of ensuring the reliability and a monolithic ceramic capacitor including the dielectric ceramic are realized.