Multilayered Ceramic Capacitor Electrode Continuity Design
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Solution Overview
Problem
The miniaturization of multilayered ceramic capacitors to increase capacitance leads to increased internal electrode formation density, which can result in cracking at the dielectric and internal electrode interface due to stress changes during manufacturing, compromising the reliability and capacitance of the component.
Innovation Solution
A multilayered ceramic electronic component design where the active region's internal electrode continuity is optimized by trisecting the cross-section into specific regions, ensuring higher continuity in certain areas and lower in others, with a defined active region ratio to the entire area, and a margin portion width of 50 μm or less, to alleviate internal stress and prevent cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the thickness of dielectric layer is reduced or the amount of multilayered internal electrodes is increased to miniaturize the capacitor and increase capacitance, then the capacitance and miniaturization are improved, but internal stress increases causing cracking at the interface between dielectric layer and internal electrode layer
Solution Approach 1:
The patent applies local quality by creating different internal electrode continuity characteristics in different regions of the active area. Specifically, the center region (central 50% in both length and width directions) has higher internal electrode continuity (85% or more), while the peripheral regions have lower continuity (70% or more). This spatial variation in electrode continuity allows stress distribution optimization, preventing cracking at dielectric-electrode interfaces while maintaining high capacitance through increased electrode formation density.
2Quantity of substance
If the formation density of internal electrodes in the active region is increased, then the capacitance is improved, but internal stress causes cracking at the interface between dielectric layer and internal electrode layer
Solution Approach 1:
The patent implements local quality by establishing different internal electrode continuity levels in different spatial regions. The center region maintains high continuity (85% or more) to provide structural support and distribute stress, while peripheral regions have moderate continuity (70% or more) that balances capacitance contribution with stress management. This localized differentiation allows the interface between dielectric and electrode layers to maintain sufficient strength even with increased overall electrode formation density.
3Volume of moving object
If the multilayered ceramic capacitor is miniaturized to 0603 size or less, then the productivity and compactness are improved, but the internal stress increases causing reliability deterioration
Solution Approach 1:
The patent applies local quality by creating a non-uniform internal electrode continuity distribution within the miniaturized 0603 size or smaller component. The center region (central 50% in length and width) exhibits higher continuity (85% or more) to provide stress distribution pathways, while peripheral regions show lower continuity (70% or more). This spatially differentiated structure enables the miniaturized component to maintain reliability and resist cracking despite the constrained size that would otherwise concentrate stress.
Data Source
AI summary
There is provided multilayered ceramic electronic component having a 0603 size or less, the multilayered ceramic electronic component including: a ceramic body including a plurality of internal electrodes and dielectric layers disposed between the internal electrodes; and external electrodes disposed on outer surfaces of the ceramic body and electrically connected to the internal electrodes, wherein when a region in which the internal electrodes are overlapped is defined as an active region in a cross section of a central portion in a length direction of the ceramic body, taken in width and thickness directions thereof, the entire area of the cross section taken in the width and thickness directions is defined as At, and an area of the active region is defined as Aa, the following equation is satisfied: 65%≦Aa/At≦90%.