- 专利标题: Multilayer ceramic capacitor and method for producing the same
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申请号: US15163885申请日: 2016-05-25
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公开(公告)号: US10312023B2公开(公告)日: 2019-06-04
- 发明人: Akitaka Doi , Shinichi Yamaguchi , Shoichiro Suzuki
- 申请人: Murata Manufacturing Co., Ltd.
- 申请人地址: JP Nagaokakyo-shi, Kyoto-fu
- 专利权人: MURATA MANUFACTURING CO., LTD.
- 当前专利权人: MURATA MANUFACTURING CO., LTD.
- 当前专利权人地址: JP Nagaokakyo-shi, Kyoto-fu
- 代理机构: Arent Fox LLP
- 优先权: JP2015-114877 20150605
- 主分类号: H01G4/30
- IPC分类号: H01G4/30 ; H01G4/008 ; H01G4/248 ; H01G4/232 ; H01G11/30
摘要:
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.
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