Multi-Layer Ceramic Component Electrode Strength via Thickness Ratios
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Solution Overview
Problem
The miniaturization of electronic devices has led to a reduction in the height of multi-layer ceramic electronic components, resulting in decreased strength, particularly in the electrode drawn sections, making it challenging to enhance reliability.
Innovation Solution
A multi-layer ceramic electronic component with a ceramic body having specific dimensions and configurations, including external electrodes that cover the internal electrodes, ensuring high strength and reliability while maintaining a low-profile design, by adhering to specific thickness and proportion criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the height of the multi-layer ceramic electronic component is reduced to achieve miniaturization, then the component size is reduced, but the strength of the electrode drawn sections is significantly reduced
Solution Approach 1:
The patent applies parameter changes by establishing specific mathematical relationships between the thickness of the ceramic body (Ts), the thickness of the external electrode (T), and the sum of thicknesses of internal electrodes (t). The condition 0.19 ≤ (2T+t)/Ts ≤ 1.55 optimizes these parameters to maintain strength while reducing overall component height, directly resolving the contradiction between miniaturization and strength preservation.
Solution Approach 2:
The patent utilizes composite material structures by combining multiple layers of ceramic material with internal electrodes and external electrodes in a multi-layer configuration. This composite structure allows the component to achieve both reduced height and maintained strength through the synergistic combination of different materials and their optimized thickness ratios.
2Device complexity
If the number of internal electrodes in the electrode drawn sections is reduced by half compared to the center portion, then the component complexity is reduced, but the reliability is significantly reduced
Solution Approach 1:
The patent changes the parameter of electrode thickness distribution by ensuring that the sum of thicknesses of internal electrodes (t) and external electrodes (2T) maintains a specific ratio to the ceramic body thickness (Ts) within the range 0.19 ≤ (2T+t)/Ts ≤ 1.55. This parameter optimization compensates for the reduced number of internal electrodes in the drawn sections, maintaining reliability while reducing complexity.
Solution Approach 2:
The patent applies asymmetry by having different numbers of internal electrodes in different sections of the component - the center portion has a higher number of internal electrodes while the electrode drawn sections have reduced numbers. This asymmetric distribution, combined with optimized thickness parameters, allows complexity reduction in drawn sections while maintaining overall reliability through the thickness ratio compensation.
Data Source
AI summary
A multi-layer ceramic electronic component that satisfies the following: 30 μm≤Ts≤100 μm, 6 μm≤T≤18 μm, and 0.19≤(2T+t)/Ts≤1.55, where Ts represents a dimension of a ceramic body measured along a first axis, T represents a mean value of thickness dimensions of upper and lower portions of an external electrode measured along the first axis that cover edges of top and bottom surfaces of the ceramic body, and t represents a sum of thickness dimensions of internal electrodes drawn to and in contact with the external electrode.