Multi-Layer Ceramic Capacitor Reinforcement via Electrode Extension
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Solution Overview
Problem
Super-thin multi-layer ceramic capacitors face challenges in ensuring strength in the thickness direction, particularly when the ceramic body thickness is 80 μm or less, as they are prone to mechanical damage and insufficient flexural strength.
Innovation Solution
The design incorporates first and second external electrodes that extend along the longitudinal direction of the ceramic body, with a specific ratio of extension portion thickness to total thickness, ensuring reinforcement and improved flexural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the ceramic body thickness is reduced to achieve miniaturization, then the height of the electronic component is reduced, but the flexural strength in the thickness direction becomes insufficient
Solution Approach 1:
The patent combines the ceramic body with external electrodes to form a composite structure. The external electrodes, having different mechanical properties than the ceramic material, reinforce the overall structure and improve flexural strength in the thickness direction while allowing the ceramic body to maintain its reduced thickness for miniaturization purposes.
Solution Approach 2:
The patent applies external electrodes specifically at critical locations where mechanical reinforcement is needed. By concentrating the reinforcing material in strategic positions rather than uniformly throughout the entire component, the design achieves improved strength-to-weight ratio and maintains the thin profile where possible.
2Length of stationary object
If the external electrodes are made thinner to reduce overall component height, then the low-profile requirement is met, but the reinforcement effect on the ceramic body becomes insufficient
Solution Approach 1:
The patent optimizes the thickness parameter of the external electrodes to a specific range that balances two competing requirements: thin enough to maintain the low-profile characteristic, but thick enough to provide adequate mechanical reinforcement. This parameter optimization ensures both the aesthetic/size requirement and the structural integrity requirement are satisfied simultaneously.
Data Source
AI summary
A multi-layer ceramic electronic component includes: a ceramic body including first and second main surfaces oriented in a first axial direction, first and second end surfaces oriented in a second axial direction orthogonal to the first axial direction, a first internal electrode, and a second internal electrode, the ceramic body being formed to be long in a third axial direction orthogonal to the first and second axial directions; a first external electrode including a first cover portion and a first extension portion; and a second external electrode including a second cover portion and a second extension portion, the multi-layer ceramic electronic component satisfying that, when T1 represents a dimension of the ceramic body in the first axial direction, and when T2 represents a dimension of each of the first and second extension portions in the first axial direction, T1 is 80 μm or less and T2/(T1+T2) is 0.32 or less.