Series Capacitor Electrode Layout to Prevent Crack Shorting
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Solution Overview
Problem
Existing electronic components with multiple series-connected capacitor portions face challenges in performance improvement, reliability, and susceptibility to short-circuiting due to cracks propagating between capacitor portions.
Innovation Solution
The electronic component design includes a configuration where internal electrodes are arranged in series through external connection conductors, with no direct connections between adjacent capacitor portions, and incorporates terminal electrodes and conductive resin layers to enhance reliability and reduce stress, while alternating electrode layers are stacked to minimize ESL and short-circuit risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If multiple capacitor portions are connected in series through internal electrodes, then the voltage rating is improved, but the risk of short-circuiting due to crack propagation increases
Solution Approach 1:
The electronic component divides the internal electrode structure into separate, non-contacting segments between adjacent capacitor portions. Each capacitor portion has its own internal electrodes that do not physically touch or connect to adjacent capacitor portions, creating isolated electrical segments that prevent crack propagation from causing multi-capacitor short-circuits while maintaining series connection through external connection conductors.
2Device complexity
If internal electrodes are directly connected between adjacent capacitor portions, then the device complexity is reduced, but the susceptibility to crack-induced short-circuiting increases
Solution Approach 1:
External connection conductors serve as intermediary elements that connect adjacent capacitor portions electrically without requiring direct internal electrode contact. These conductors are positioned outside the element body, providing a safe connection path that isolates the internal electrode structures from each other, thereby preventing mechanical stress and crack propagation from compromising the connection between capacitor portions.
3Ease of manufacture
If internal electrodes are arranged in outermost layers, then the manufacturing process is simplified, but the surface leakage risk increases
Solution Approach 1:
The harmful function of direct electrode contact is extracted and relocated to external connection conductors positioned outside the element body. By taking the connection function out of the internal electrode structure and placing it externally, the patent eliminates the risk of surface leakage between internal electrodes while maintaining the simplified outermost layer arrangement for manufacturing ease.
Data Source
AI summary
An electronic component includes: an element body; a first terminal electrode; a second terminal electrode; a first external connection conductor; a second external connection conductor; a first internal electrode; a second internal electrode; a third internal electrode; a fourth internal electrode; and a sixth internal electrode. A first capacitor portion formed by the first internal electrode and the third internal electrode facing each other and a second capacitor portion formed by the second internal electrode and the sixth internal electrode facing each other are connected in series through the first external connection conductor. A third capacitor portion formed by the first internal electrode and the fifth internal electrode facing each other and a fourth capacitor portion formed by the second internal electrode and the fourth internal electrode facing each other are connected in series through the second external connection conductor.