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:
Aug. 29, 2017
Filed:
Mar. 19, 2015
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Masahiro Naito, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A dielectric ceramic layer includes main phase grains and a secondary phase. The main phase grains include a perovskite-type compound. The perovskite-type compound includes Zr, Mn and at least one element selected from the group consisting of Ti, Ca, Sr, and Ba. In the perovskite-type compound, a molar ratio z between Ti/(Zr+Ti) satisfies 0≦z≦0.2, a molar ratio between Zr/(Zr+Ti) is equal to 1−z, a molar ratio x between Sr/(Ca+Sr+Ba) satisfies 0≦x≦1.0, a molar ratio y between Ba/(Ca+Sr+Ba) satisfies 0≦y≦0.3, a molar ratio between Ca/(Ca+Sr+Ba) is equal to 1−x−y, and a molar ratio m between (Ca+Sr+Ba)/(Zr+Ti) satisfies 0.95≦m<1.03. The secondary phase contains segregated Mn. In a body including the dielectric ceramic layer and an internal electrode alternately stacked, the secondary phase is located inside of a second region and not located inside of a third region.