Multilayer Capacitor ESR Adjustment via Inner Electrode Grouping
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Solution Overview
Problem
Conventional multilayer capacitors face challenges in adjusting equivalent series resistance (ESR) characteristics, requiring complex manufacturing processes and user selection of specific products to meet varying ESR needs, which can lead to inconvenient and inefficient power supply management.
Innovation Solution
A multilayer capacitor design featuring a novel structure with inner and outer electrodes connected in a specific pattern, allowing users to adjust ESR characteristics by selecting which outer electrodes to connect to a power line, thereby modifying the series resistance without the need for additional inner connecting conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high resistant material is used for outer electrodes to adjust ESR, then ESR characteristics are improved, but localized heat spots occur due to current concentration from pin holes
Solution Approach 1:
The patent extracts the ESR adjustment function from the outer electrodes and transfers it to the inner electrodes. By configuring inner electrodes with different resistance values and connection patterns, the patent achieves ESR control without requiring high resistant outer electrode materials, thereby avoiding the heat spot problem caused by current concentration in outer electrodes.
Solution Approach 2:
The patent applies local quality by assigning different resistance characteristics to different inner electrodes (first inner electrodes with first resistance values, second inner electrodes with second resistance values). This allows selective activation of specific resistance paths through different outer electrode connection patterns, achieving ESR adjustment without compromising the quality of outer electrodes.
2Manufacturing precision
If high resistant material is used for inner electrodes to adjust ESR, then ESR characteristics are improved, but the material must continuously change to match ceramic material for higher capacity
Solution Approach 1:
The patent makes the inner electrodes multi-functional by designing them with adjustable resistance values and configurable connection patterns. The same inner electrode structure can achieve different ESR values simply by changing which outer electrodes are connected, eliminating the need to change inner electrode materials when ceramic material specifications change.
Solution Approach 2:
The patent changes the connection parameters (which outer electrodes are connected) rather than the material parameters of inner electrodes. By selectively connecting different combinations of outer electrodes to the power line, the effective ESR can be adjusted without modifying the inner electrode material composition, ensuring continuous compatibility with ceramic materials.
3Adaptability or versatility
If conventional ESR adjustment methods are used, then ESR characteristics can be adjusted, but the capacitor manufacturer must manufacture individual products for each ESR requirement, increasing manufacturing complexity
Solution Approach 1:
The patent introduces dynamic ESR adjustment capability into a single capacitor product. By providing multiple outer electrodes that can be selectively connected to the power line in different patterns, the ESR can be dynamically adjusted after manufacturing without requiring multiple different capacitor products. This transforms ESR from a fixed parameter to an adjustable one, simplifying manufacturing while maintaining versatility.
4Adaptability or versatility
If conventional ESR adjustment methods are used, then ESR characteristics can be adjusted, but users must inconveniently select individual products based on ESR requirements
Solution Approach 1:
The patent enables users to dynamically adjust ESR characteristics by selecting different outer electrode connection patterns rather than requiring them to select from multiple fixed ESR products. This gives users operational control over ESR adjustment, transforming product selection from a complex decision process into a simple connection configuration task.
Data Source
AI summary
There is provided a multilayer capacitor including an inner connecting conductor of at least one polarity; a plurality of first and second outer electrodes formed on a surface of the body, wherein the inner connecting conductor is connected to a corresponding one of the outer electrodes having identical polarity, a corresponding one of the inner electrodes having identical polarity to the inner connecting conductor includes a plurality of groups each including at least one of the inner electrodes, wherein the inner electrodes of the respective groups are connected to the outer electrodes having identical polarity that are different from one another for each of the groups and electrically connected to the inner connecting conductor through the connected outer electrode.