Multilayer Ceramic Capacitor Edge Thickness Ratio
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Solution Overview
Problem
The challenge in developing multilayer ceramic capacitors is to increase capacity while maintaining reliability, as thinning dielectric and inner electrode layers and increasing the number of laminated layers leads to potential dielectric breakdown, delamination, and cracking, limiting size reduction and capacity enhancement.
Innovation Solution
A multilayer ceramic component design with specific thickness ratios between central and edge portions, and between inner electrode layers, is implemented to reduce the likelihood of delamination and cracking, enhancing dielectric breakdown voltage and moisture resistance characteristics by differentially compressing the capacity formation and marginal portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the thicknesses of dielectric layer and inner electrode layer are reduced and the number of laminated layers is increased to increase capacity, then the capacity is improved, but the reliability deteriorates due to high possibility of dielectric breakdown, delamination and cracks
Solution Approach 1:
The patent applies local quality by creating different thickness zones within the lamination main body. The central portion (where inner electrodes overlap to form capacitance) has a different thickness than the marginal portions (edge areas). This differential thickness structure allows the central region to accommodate thinner dielectric and electrode layers for higher capacity, while the marginal portions maintain greater thickness to prevent delamination and cracking, thus resolving the contradiction between capacity and reliability.
2Volume of moving object
If the thicknesses of dielectric layer and inner electrode layer are reduced and the number of laminated layers is increased to reduce size, then the size is reduced, but the reliability deteriorates due to high possibility of dielectric breakdown, delamination and cracks
Solution Approach 1:
The patent implements local quality through differential thickness design where the central portion of the lamination main body has optimized thickness for high capacity in compact space, while marginal portions have increased thickness to provide mechanical strength and prevent defects. This allows size reduction through increased layer count and thinner individual layers in the central region, while reliability is maintained through thicker protective margins at the edges.
3Quantity of substance
If the number of laminated layers is increased to increase capacity, then the capacity is improved, but the manufacturing precision deteriorates due to difficulty in maintaining consistent quality across more layers
Solution Approach 1:
The patent applies segmentation by dividing the lamination main body into distinct functional zones: a central portion for capacitance formation and marginal portions for structural integrity. This segmentation allows different manufacturing tolerances and quality control approaches for different regions, making it easier to maintain consistent quality across a large number of laminated layers while achieving high capacity.
Data Source
AI summary
There is provided a multilayer ceramic electronic component including a lamination main body including a plurality of inner electrodes. When T1 represents a distance between vertically adjacent inner electrodes in a central portion of the lamination main body, and T2 represents a distance between vertically adjacent inner electrodes at an edges of the inner electrodes in a widthwise direction, a ratio (T2/T1) of T2 to T1 is 0.80 to 0.95.