Asymmetric Internal Electrode Spacing in Multilayer Ceramic Capacitors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multilayer ceramic capacitors (MLCCs) face issues with short-circuit and delamination defects between internal electrodes due to cutting stress and increased lamination, which also generate acoustic noise when voltage is applied.
Innovation Solution
The design includes a ceramic body with internal electrodes having different lead out portion lengths and spacings, forming non-overlapping capacitance regions to minimize stress-induced defects and acoustic noise, with insulating layers and specific electrode configurations to enhance reliability and reduce delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the lamination amount is increased to implement high capacity MLCC, then the capacity is improved, but a delamination defect is generated due to a step formed between a region in which internal electrodes are not formed and a region in which internal electrodes are formed
Solution Approach 1:
The patent applies asymmetry by making the distances from the internal electrodes to the second lateral surface different (T1 ≠ T2), creating an asymmetric electrode configuration that eliminates the step formation between electrode regions and the region without internal electrodes, thereby preventing delamination while maintaining high capacity through increased lamination
2Productivity
If all external electrodes are positioned on a lower surface to achieve excellent mounting density and capacity, then the mounting density and capacity are improved, but a short circuit defect may easily occur between the internal electrodes due to a thrust phenomenon occurring in internal electrodes facing one another, due to cutting stress
Solution Approach 1:
The patent positions external electrodes on both the lower surface and the first lateral surface, creating an asymmetric electrode arrangement that reduces thrust phenomenon and cutting stress on internal electrodes, thereby preventing short circuit defects while maintaining high mounting density
3Volume of moving object
If thinned dielectric layers and internal electrodes are included to have a reduced size, then the size is reduced, but the manufacturing precision becomes more difficult to maintain
Solution Approach 1:
The patent optimizes the distance parameters T1 and T2 between internal electrodes and the lateral surface, creating an asymmetric configuration that provides manufacturing tolerance and reduces the thrust phenomenon, thereby enabling reduced size while maintaining manufacturing precision
Data Source
AI summary
There is provided a multilayer ceramic electronic component including: a ceramic body; a plurality of first internal electrodes formed within the ceramic body; a plurality of second internal electrodes alternately laminated together with the first internal electrodes with the dielectric layer interposed therebetween, insulated from the first internal electrodes, wherein a distance between the plurality of first internal electrodes 121 and the second lateral surface 2 and a distance between the plurality of second internal electrodes 122 and the second lateral surface 2 are different, and when the longest distance between the uppermost internal electrode and the lowermost electrode, among the plurality of first and second internal electrodes 121 and 122, is T1 and the shortest distance therebetween is T2, 0.76≦T2/T1≦0.97 is satisfied.