Invention Grant
- Patent Title: Laminated ceramic capacitor
- Patent Title (中): 层压陶瓷电容器
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Application No.: US13953043Application Date: 2013-07-29
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Publication No.: US09202628B2Publication Date: 2015-12-01
- Inventor: Tomotaka Hirata , Hitoshi Nishimura , Shinya Isota , Taketsugu Ogura , Masahiro Naito
- Applicant: MURATA MANUFACTURING CO., LTD.
- Applicant Address: JP Nagaokakyo-Shi, Kyoto-Fu
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Nagaokakyo-Shi, Kyoto-Fu
- Agency: Arent Fox LLP
- Priority: JP2012-177072 20120809
- Main IPC: H01G4/12
- IPC: H01G4/12 ; H01G4/30 ; B32B18/00 ; C04B35/486 ; C04B35/49

Abstract:
laminated ceramic capacitor which has favorable moisture resistance includes an inner layer section that has dielectric ceramic layers and internal electrodes stacked alternately, and outer layer sections formed outside the inner layer section. The dielectric ceramic layers have a perovskite-type compound including a main constituent containing Ca and Zr, and an additive containing Si and Mn. The average grain size in the dielectric ceramic layers constituting the outer layer sections is smaller than the average grain size in the dielectric ceramic layers constituting the inner layer section. The Si/Mn molar ratio in the dielectric ceramic near the interfaces between the internal electrodes and the dielectric ceramic layers is ≦15.
Public/Granted literature
- US20140043722A1 LAMINATED CERAMIC CAPACITOR Public/Granted day:2014-02-13
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