Multilayer ceramic capacitor

By providing a dielectric layer in a specific area of ​​the laminated ceramic capacitor and forming a continuous mutual diffusion layer, the problem of moisture intrusion when the external electrode becomes thinner is solved, and the stability of the insulation resistance is improved.

CN119948584APending Publication Date: 2025-05-06MURATA MFG CO LTD
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Patent Information

Application Number
CN202380069539.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-12-19
Filing Date
2023-10-16
Publication Date
2025-05-06

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Abstract

Provided is a multilayer ceramic capacitor capable of reducing the possibility of moisture intrusion from an external electrode side. In this multilayer ceramic capacitor (1), an inner layer section (11) has a first main surface-side region (11s1), a second main surface-side region (11s2), and a center region (11c) between the first main surface-side region (11s1) and the second main surface-side region (11s2). The average thickness (Lc) of the dielectric layers (14) in the central region (11c), the dielectric layers (14) being located between the internal electrodes (15) adjacent to each other in the lamination direction and exposed on the same surface, and the external electrodes (3, 4) being defined as (Lc). In at least one of the first main surface-side region (11s1) and the second main surface-side region (11s2), the thickness (Ls) of a portion of the dielectric layer (14) in contact with the external electrodes (3, 4), the dielectric layer (14) being located between the internal electrodes (15) adjacent to each other in the stacking direction and exposed on the same surface, is Ls < 0.75 Lc.
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Citation Information

Patent Citations

  • Multilayer ceramic chip capacitor

    JP1993003132A