Multilayer Capacitor Array ESR Control via Segmented Electrodes
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Solution Overview
Problem
The demand for higher capacitance and equivalent series resistance (ESR) in multilayer capacitors is conflicting, as increasing the number of laminated dielectric and internal electrode layers decreases ESR due to the parallel connection of lead conductor resistance components.
Innovation Solution
The ESR is adjusted by connecting internal electrodes to each other through external connecting conductors on the laminated body, allowing for a controlled number of lead conductors and varying their positions, enabling a higher ESR while maintaining capacitance by connecting only part of the internal electrodes to terminal conductors via lead conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of laminated dielectric layers and internal electrode layers is increased to enhance capacitance, then the capacitance increases, but the ESR decreases due to the parallel connection of lead conductor resistance components
Solution Approach 1:
The internal electrodes are divided into multiple groups (first inner electrode group and second inner electrode group) with different connection configurations. The first group connects to the first terminal conductor through lead conductors, while the second group connects to the second terminal conductor through a different number of lead conductors. This segmentation allows different ESR characteristics in different capacitor units within the same array, resolving the contradiction between high capacitance and high ESR requirements.
2Ease of manufacture
If all internal electrodes are connected to terminal conductors through lead conductors, then the manufacturing process is simplified, but the ESR becomes too small due to parallel resistance connections
Solution Approach 1:
Different connection configurations are applied to different internal electrode groups. The first inner electrode group uses a first connection configuration with a certain number of lead conductors, while the second inner electrode group uses a second connection configuration with a different number of lead conductors. This local differentiation allows optimization of ESR for specific capacitor units while maintaining overall manufacturing efficiency through standardized processes.
Data Source
AI summary
Among a plurality of first inner electrodes, at least one first inner and a second inner electrode are arranged as opposed with at least one of the dielectric layers in between. Third and fourth inner electrodes are arranged as opposed with at least one of the dielectric layers in between. The first inner electrodes are electrically connected to a first external connection conductor via lead conductors. The second inner electrode is electrically connected to a second terminal conductor via a lead conductor. The third inner electrode is electrically connected to a third terminal conductor via a lead conductor. The fourth inner electrode is electrically connected to a fourth terminal conductor via a lead conductor. Among all the first inner electrodes, one to multiple first inner electrodes that are less than the total first inner electrodes are electrically connected to the first terminal conductors via lead conductors.