Multilayer Ceramic Component Margin Segmentation
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Solution Overview
Problem
In multilayer ceramic electronic components, the bending of internal electrodes due to dielectric layer stretching leads to decreased breakdown voltage, and the use of separately attached margin portions often results in delamination, compromising moisture resistance and mechanical strength.
Innovation Solution
A multilayer ceramic electronic component design featuring a ceramic body with internally stacked first and second internal electrodes, where margin portions are formed on specific surfaces to reduce the number of bonding points, thereby minimizing delamination and enhancing mechanical strength and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the area of the dielectric layer is formed to be larger than the area of the internal electrode to form a margin portion, then the internal electrode is protected from exposure, but the dielectric layers are stretched to fill step portions causing internal electrodes to bend and breakdown voltage to decrease
Solution Approach 1:
The margin portion is divided into a first margin portion and a second margin portion that are differently disposed on opposite surfaces of the ceramic body. This segmentation allows each margin portion to be independently optimized for its specific location, preventing uniform stretching that causes internal electrode bending while still providing comprehensive edge protection.
Solution Approach 2:
Different margin portions are disposed on different surfaces (first margin portion on first and second surfaces, second margin portion on third and fourth surfaces) with different area ratios relative to the internal electrode area. This local quality approach optimizes the margin configuration for each specific location to minimize stretching-induced bending while maintaining adequate coverage.
2Manufacturing precision
If a separately manufactured sheet is attached to form a margin portion, then the margin portion can be precisely formed, but delamination occurs between the margin portion and the ceramic body
Solution Approach 1:
The first margin portion and second margin portion are formed as an integrated structure within the ceramic body rather than as separate attached components. This merging eliminates the interfaces between separately manufactured parts, preventing delamination while maintaining precise margin formation through coordinated disposal on opposite surfaces.
Solution Approach 2:
The margin portions are asymmetrically disposed with different area ratios on different surfaces (first margin portion has first area ratio, second margin portion has second area ratio). This asymmetric configuration optimizes each margin portion for its specific location while maintaining overall structural integrity and preventing delamination.
3Reliability
If multiple margin portions are attached to cover all surfaces of the capacitance formation portion, then moisture resistance is improved, but the number of bonding points increases leading to more delamination paths
Solution Approach 1:
The first margin portion and second margin portion serve multiple functions simultaneously: they provide moisture barrier coverage on opposite surfaces, structurally support the ceramic body, and electrically isolate adjacent internal electrodes. This multi-functionality reduces the need for additional separate components, minimizing bonding points while maintaining comprehensive moisture resistance.
Data Source
AI summary
A multilayer ceramic electronic component includes a ceramic body including a dielectric layer and first and second internal electrodes, a first external electrode connected to the first internal electrode, and a second external electrode connected to the second internal electrode. The ceramic body includes a capacitance formation portion having first and a second surfaces opposing each other in a first direction, third and fourth surfaces opposing each other in a second direction, and fifth and sixth surfaces opposing each other in a third direction, the ceramic body including a first margin portion disposed on the third and fifth surfaces and a second margin portion disposed on the fourth and sixth surfaces.