Multilayer Ceramic Component Asymmetric Electrode Strength
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Solution Overview
Problem
Multilayer ceramic electronic components face challenges in maintaining strength as they miniaturize, with existing designs struggling to balance flexural strength, tensile strength, and mounting reliability in compact IT components.
Innovation Solution
The design incorporates a ceramic body with dielectric layers and alternately laminated internal electrodes, exposed to external surfaces, and external electrodes that extend along the surface, optimizing the ratio of longest to shortest distances and average lengths to enhance strength and reliability, with specific ratios of Lb/La ≤ 0.6 and BWc/BWd ≥ 0.7, and the use of conductive materials for improved electrical connectivity and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multilayer ceramic electronic components are miniaturized to meet compact IT product requirements, then compactness is improved, but strength (flexural strength, tensile strength, fixing strength) deteriorates
Solution Approach 1:
The external electrodes are designed with asymmetric extension lengths along the length direction of the ceramic body. Specifically, the first external electrode extends beyond the first end of the ceramic body by a first length, while the second external electrode extends beyond the second end by a second length that is different from the first length. This asymmetric configuration creates uneven stress distribution that prevents crack propagation and improves overall component strength despite miniaturization.
Solution Approach 2:
The patent applies different extension lengths to external electrodes at different locations along the ceramic body. The external electrodes have varying extension characteristics - extending more at certain ends than others - creating localized quality differences that enhance strength at critical stress points while maintaining compact overall dimensions.
2Strength
If external electrodes extend along the surface of the ceramic body, then strength is improved, but device complexity increases due to additional geometric parameters
Solution Approach 1:
The patent optimizes specific geometric parameters of the external electrodes, namely the extension lengths along the length direction. By establishing quantitative relationships (first length and second length being different but within controlled ranges), the patent transforms a complex geometric design problem into a manageable parameter optimization problem that improves fixing strength without excessive complexity.
Data Source
AI summary
A multilayer ceramic electronic component includes a ceramic body including dielectric layers and first and second internal electrodes alternately laminated with the respective dielectric layers disposed therebetween, and first and second external electrodes disposed on first and second external surfaces of the ceramic body to be connected to corresponding internal electrodes, respectively. A longest distance from the first external electrode to the second external electrode is denoted by La, a shortest distance from the first external electrode to the second external electrode is denoted by Lb, and Lb/La is greater than zero to 0.6 or less.