Invention Grant
- Patent Title: Multilayer ceramic capacitor including main phase grains and a secondary phase
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Application No.: US14662532Application Date: 2015-03-19
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Publication No.: US09748041B2Publication Date: 2017-08-29
- Inventor: Masahiro Naito
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2014-065613 20140327; JP2015-027519 20150216
- Main IPC: H01G4/30
- IPC: H01G4/30 ; H01G4/12

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
Public/Granted literature
- US20150279564A1 MULTILAYER CERAMIC CAPACITOR Public/Granted day:2015-10-01
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