Multilayer Ceramic Capacitor Density Control
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in increasing capacity while maintaining reliability due to the possibility of dielectric breakdown, delamination, and cracking when dielectric layers and internal electrodes are thinned and the number of lamination layers is increased, leading to limitations in miniaturization and high-capacity development.
Innovation Solution
A multilayer ceramic electronic component design that controls the thickness ratio of the capacity formation portion to the distance between internal electrodes and the overall multilayer body, with specific thickness ranges for the dielectric and internal electrode layers, to reduce the difference in density between the capacity formation and electrode withdrawal portions, thereby minimizing delamination and crack creation and enhancing insulation breakdown voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of lamination layers is increased to increase capacity, then the capacity of the multilayer ceramic capacitor is improved, but the possibility of dielectric breakdown, delamination, and cracking increases
Solution Approach 1:
The patent applies local quality by creating different density regions within the multilayer body. The first region has a first density and the second region has a second density that is different from the first density. This localized density variation allows the structure to accommodate the increased number of lamination layers while maintaining reliability by preventing dielectric breakdown, delamination, and cracking in specific critical areas.
Solution Approach 2:
The patent changes the density parameter of the multilayer body by forming regions with different densities. By controlling the density distribution (first density in the first region, second density in the second region), the patent resolves the contradiction between increasing capacity through more lamination layers and maintaining reliability by preventing structural failures.
2Quantity of substance
If the thickness of dielectric layer and internal electrode is decreased to increase capacity, then the capacity of the multilayer ceramic capacitor is improved, but dielectric breakdown, delamination, and cracking may occur
Solution Approach 1:
The patent applies local quality by creating different density regions within the multilayer body. The first region has a first density and the second region has a second density that is different from the first density. This localized density variation allows the structure to accommodate thinner dielectric layers and internal electrodes while maintaining strength by preventing structural failures in specific critical areas.
Solution Approach 2:
The patent changes the density parameter of the multilayer body by forming regions with different densities. By controlling the density distribution (first density in the first region, second density in the second region), the patent resolves the contradiction between increasing capacity through thinner layers and maintaining strength to prevent dielectric breakdown, delamination, and cracking.
3Volume of moving object
If the multilayer body is compressed to reduce size, then the miniaturization is improved, but the difference in density between capacity formation and electrode withdrawal portions increases causing delamination and cracking
Solution Approach 1:
The patent applies local quality by intentionally creating different density regions in specific locations. The first region has a first density and the second region has a second density that is different from the first density. This controlled local density variation prevents the harmful uniform density differences that cause delamination and cracking during compression, while still achieving miniaturization.
Solution Approach 2:
The patent changes the density parameter by forming regions with different densities in the multilayer body. By controlling where density variations occur (first region vs. second region), the patent achieves miniaturization through compression while maintaining compositional stability and preventing delamination and cracking.
Data Source
AI summary
There is provided a multilayer ceramic electronic component, including: a multilayer body having a dielectric layer; and a plurality of internal electrode layers provided in the multilayer body, and having ends exposed to at least one face of the multilayer body, wherein, a ratio of T2 to T1 (T2/T1) ranges from 0.70 to 0.95, when T1 represents a thickness of a capacity formation portion formed by overlapping the plurality of internal electrode layers and T2 represents a distance between ends of outermost internal electrodes arranged on one face of the multilayer body to which the ends of the internal electrodes are exposed, and a thickness D1 of the multilayer body, in which the capacity formation portion is formed, is greater than a thickness D2 of a first side of the multilayer body to which the ends of the internal electrodes are exposed.