Invention Grant
- Patent Title: Laminated ceramic capacitor
- Patent Title (中): 层压陶瓷电容器
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Application No.: US13880678Application Date: 2011-09-26
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Publication No.: US08908353B2Publication Date: 2014-12-09
- Inventor: Kenji Takashima , Shinsuke Takeoka
- Applicant: Kenji Takashima , Shinsuke Takeoka
- Applicant Address: JP Tokyo
- Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- Priority: JP2011-047897 20110304
- International Application: PCT/JP2011/071789 WO 20110926
- International Announcement: WO2012/120712 WO 20120913
- Main IPC: H01G4/10
- IPC: H01G4/10 ; C04B35/468 ; H01G4/12 ; H01B3/12 ; H01G4/30

Abstract:
A laminated ceramic capacitor has multiple layered dielectric ceramic layers of a dielectric ceramic constituted by primary phase grains whose primary component is BaTiO3, secondary phase grains containing at least Re (Re represents at least one of Eu, Gd, Dy, Ho, Er, Yb, and Y), Ba, and Ti, and grain boundary phase containing at least one of B and Li or both; and internal electrodes which are made of Cu or Cu alloy. When a thickness of the dielectric ceramic layer is given by t, and when grain sizes at cumulative 20%, cumulative 50%, and cumulative 95% points of a cumulative count distribution of the primary phase grains are given by D20, D50, and D95, respectively, D20≦D50×70%, D50≦t/4, D95≦t/2, and CV value ((standard deviation between D20 and D95)/D50)
Public/Granted literature
- US20140009864A1 LAMINATED CERAMIC CAPACITOR Public/Granted day:2014-01-09
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