Curved Multilayer Ceramic Capacitor Structure Against Corner Cracking
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Solution Overview
Problem
Multilayer ceramic capacitors are prone to cracking or breaking due to their structural weaknesses at corners and vertices, making them susceptible to external impacts.
Innovation Solution
The design incorporates a stacked body with curved surfaces and external electrodes disposed on a circular or elliptical cylinder shape, featuring internal electrodes with lead portions spaced apart and connected to external electrodes, enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rectangular parallelepiped shape is used for the multilayer ceramic capacitor, then the manufacturing process is simple and easy to manufacture, but the structure is weak to external impact at corners and vertices causing cracking or breaking
Solution Approach 1:
The patent applies curvature by changing the shape of the stacked body from a rectangular parallelepiped to a cylindrical shape with rounded boundaries. This eliminates sharp corners and vertices that are prone to cracking under external impact, thereby improving the reliability and resistance to breakage while maintaining manufacturability through standard ceramic forming processes
2Device complexity
If a rectangular parallelepiped shape is used for the multilayer ceramic capacitor, then the structure is simple, but the corners and vertices are weak points that lead to cracking under external impact
Solution Approach 1:
The patent introduces a cylindrical shape with curved surfaces and rounded boundaries, transforming the simple rectangular structure into a more complex curved geometry. This curvature eliminates stress concentration points at corners and vertices, significantly improving the structure's resistance to external impact and reducing cracking while the complexity remains manageable through standard manufacturing techniques
Data Source
AI summary
A disclosed multilayer ceramic electronic component includes: a stacked body that includes a plurality of dielectric layers stacked in a first direction and a plurality of internal electrodes stacked in the first direction; and a first external electrode, a second external electrode, a third external electrode, and a fourth external electrode that are disposed outside the stacked body. The plurality of internal electrodes includes a plurality of first internal electrodes connected to the first external electrode and the second external electrode and a plurality of second internal electrodes connected to the third external electrode and the fourth external electrode, and an edge of a cross-section of the stacked body that intersects the first direction is a curve.