Multilayer Electronic Component Electrode Layout for Short-Circuit Control
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges with smaller size and higher capacitance requirements, leading to issues like short circuits, reduced capacitance, and lower breakdown voltage due to internal electrode thickness and non-uniform connectivity and smoothness.
Innovation Solution
The solution involves controlling the area fraction of the capacitance formation portion to ensure uniform connectivity and smoothness of internal electrodes, with a ratio of 5.5% or less for the brightness intensity range of 110% to 126% compared to the average value of the cover portion, and using a manufacturing method that includes coating a silicone pattern on a polymer sheet, applying internal electrode paste, transferring it to a ceramic green sheet, stacking, sintering, and forming external electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the internal electrode thickness is reduced to achieve smaller size and higher capacitance, then the component size decreases and capacitance increases, but short circuit between internal electrodes occurs and reliability deteriorates
Solution Approach 1:
The patent applies local quality by creating a two-tone structure where the internal electrode has different thicknesses in different regions: a first thickness in the capacitance formation portion and a second thickness in the cover portion. This local differentiation allows the electrode to be thin where capacitance is needed while being thicker where structural integrity and short circuit prevention are critical.
Solution Approach 2:
The internal electrode is segmented into multiple regions with different thickness characteristics. The capacitance formation portion has a first thickness optimized for electrical performance, while the cover portion has a second thickness optimized for mechanical strength and reliability. This segmentation resolves the contradiction by allowing each region to serve its specific function independently.
2Volume of moving object
If the internal electrode thickness is reduced to achieve smaller size, then the component size decreases, but non-uniform connectivity and smoothness occur
Solution Approach 1:
The patent implements local quality by specifying different thickness requirements for different portions of the internal electrode. The capacitance formation portion maintains a first thickness for optimal electrical connectivity, while the cover portion has a second thickness for structural stability. This local differentiation ensures uniform connectivity and smoothness in the critical capacitance region while allowing thickness variation in non-critical regions.
3Quantity of substance
If the internal electrode thickness is reduced to achieve higher capacitance, then the capacitance increases, but breakdown voltage decreases
Solution Approach 1:
The patent applies local quality by creating a two-tone structure where the internal electrode has different thicknesses in different regions: a first thickness in the capacitance formation portion and a second thickness in the cover portion. This local differentiation allows the electrode to be thin where capacitance is needed while being thicker where structural integrity and short circuit prevention are critical.
Data Source
AI summary
A multilayer electronic component according to another exemplary embodiment of the present disclosure may suppress occurrence of a short circuit between the internal electrodes, lower capacitance or reduced breakdown voltage by controlling an area fraction of a region of a capacitance formation portion, in which a range of brightness intensity is 110% or more and 126% or less compared to an average value of brightness intensity of a cover portion.