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:
Oct. 07, 2008
Filed:
Nov. 22, 2005
Kenichi Iwasaki, Kirishima, JP;
Daisuke Fukuda, Kirishima, JP;
Masahiro Nishigaki, Kirishima, JP;
Kiyoshi Matsubara, Kirishima, JP;
Kousei Kamigaki, Kirishima, JP;
Kenichi Iwasaki, Kirishima, JP;
Daisuke Fukuda, Kirishima, JP;
Masahiro Nishigaki, Kirishima, JP;
Kiyoshi Matsubara, Kirishima, JP;
Kousei Kamigaki, Kirishima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
Provided is a multilayer ceramic capacitor having a capacitor body formed by alternately laminating a dielectric layer and an internal electrode layer, and an external electrode formed on both ends of the capacitor body. The dielectric layer has at least two type of barium titanate crystal grains that differ from one another in at least one selected from Ca composition concentration, Sr composition concentration, and Zr composition concentration, and a grain boundary phase. If this multilayer ceramic capacitor employs, as a dielectric layer, a dielectric ceramic that contains barium titanate crystal grains in which part of Ba is substituted by Ca, Sr, or Zr, it is capable of suppressing the grain growth of crystal grains, and improving relative dielectric constant, temperature characteristic, and high-temperature load test characteristic, for example, in high-volume manufacturing using a tunnel type large kiln.