Multilayer Ceramic Capacitor Segmented Electrodes Spacer Design
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Solution Overview
Problem
Multilayer ceramic capacitors face issues with delamination and cracking due to the increased number of stacked layers, which affects their mechanical strength and reliability, especially in applications requiring high capacity and resistance to moisture.
Innovation Solution
A multilayer electronic component design featuring dielectric layers alternately stacked with internal electrode layers, where spacers are used to improve mechanical strength and prevent delamination, and external electrodes are arranged to enhance connectivity and reduce equivalent series resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of stacked layers is increased to secure high capacity, then the capacity is improved, but delamination of the capacity forming portion and protective layer occurs, and cracking occurs during the plasticizing process
Solution Approach 1:
The internal electrode layer is segmented into multiple electrodes (first internal electrode, second internal electrode, third internal electrode) with spacers positioned between them. This segmentation distributes the mechanical stress across multiple points rather than concentrating it in a single continuous electrode structure, thereby preventing delamination and cracking while maintaining high capacity through the stacked configuration.
Solution Approach 2:
Spacers are introduced as intermediary elements positioned between the internal electrodes within the dielectric layer. These spacers act as mechanical mediators that prevent direct contact between adjacent electrodes, reducing stress concentration and preventing delamination of the capacity forming portion from the protective layers during the plasticizing process and throughout operation.
2Quantity of substance
If the number of stacked layers is increased to secure high capacity, then the capacity is improved, but mechanical strength deteriorates
Solution Approach 1:
The internal electrode layer is divided into multiple discrete electrodes with spacers positioned between them. This segmentation creates a distributed structural framework that maintains mechanical strength even as the number of stacked layers increases, preventing the continuous electrode structure from becoming a weakness point under mechanical stress.
Solution Approach 2:
The capacitor employs a composite structure combining dielectric layers, internal electrodes, and spacers. This composite material approach creates a multi-component system where each material contributes specific properties: the dielectric provides insulation and capacitance, the electrodes provide conductivity, and the spacers provide mechanical reinforcement, collectively enhancing overall mechanical strength while maintaining high capacity.
3Reliability
If spacers are used to prevent delamination and improve mechanical strength, then reliability is improved, but device complexity increases
Solution Approach 1:
The spacers perform multiple functions simultaneously: they prevent delamination of the capacity forming portion, improve mechanical strength, and maintain proper electrode spacing. By making the spacer structure multi-functional, the design achieves high reliability without proportionally increasing complexity, as a single structural element addresses multiple potential failure modes.
Data Source
AI summary
A multilayer electronic component includes a body comprising dielectric layers, and first and second internal electrode layers alternately stacked in a stacking direction with respective dielectric layers interposed therebetween. The first internal electrode layer includes first and second internal electrodes arranged with a first spacer interposed therebetween, and the second internal electrode layer includes third and fourth internal electrodes arranged with a second spacer interposed therebetween.