Invention Grant
- Patent Title: Multilayer ceramic capacitor and method for producing the same
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Application No.: US15163885Application Date: 2016-05-25
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Publication No.: US10312023B2Publication Date: 2019-06-04
- Inventor: Akitaka Doi , Shinichi Yamaguchi , Shoichiro Suzuki
- 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: JP2015-114877 20150605
- Main IPC: H01G4/30
- IPC: H01G4/30 ; H01G4/008 ; H01G4/248 ; H01G4/232 ; H01G11/30

Abstract:
A multilayer ceramic capacitor having inner electrodes with a Ni-Metal A alloy, the Metal A being selected from Fe, V, Y, and Cu and dissolved in the Ni to form a solid solution. The percentage of the Metal A with respect to the total amount of Metal A and Ni in near-surface regions located at a depth of 2 nm from a surface of the inner electrode in contact with an adjacent ceramic dielectric layer is 1.4 or more atom %, and XA−YA≥1.0, where XA represents the atomic percentage of Metal A in the near-surface regions and YA represents the atomic percentage of Metal A in mid-thickness regions of the inner electrodes. A method for producing a multilayer ceramic capacitor includes annealing the ceramic multilayer body under specific conditions to thereby increase, in the inner electrodes, the percentage of Metal A in the near-surface regions.
Public/Granted literature
- US20160358712A1 MULTILAYER CERAMIC CAPACITOR AND METHOD FOR PRODUCING THE SAME Public/Granted day:2016-12-08
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