Multilayer Capacitor ESR Adjustment via Segmented Electrodes
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Solution Overview
Problem
The existing multilayer capacitors face difficulties in precisely adjusting the equivalent series resistance (ESR) to desirable values, as increasing capacity and ESR demands are contradictory, and current methods require complex regulation of inner resistance layer thickness and composition.
Innovation Solution
The multilayer capacitor design includes alternating dielectric and inner electrodes connected via through-hole conductors, allowing for adjustment of the number and position of lead conductors to set the ESR to a desirable value, enabling precise regulation of ESR by varying the connections between inner electrodes and terminal electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of dielectric layers and inner electrodes is increased to increase capacity, then the capacity is improved, but the equivalent series resistance further decreases due to increased number of lead conductors connected in parallel
Solution Approach 1:
The patent segments the inner electrodes into two groups: odd-numbered inner electrodes connected to a first terminal electrode and even-numbered inner electrodes connected to a second terminal electrode. This segmentation creates an alternating connection pattern that reduces the number of lead conductors connected in parallel to each terminal, thereby increasing the equivalent series resistance while maintaining high capacity through the increased number of dielectric layers and inner electrodes.
2Reliability
If the thickness of inner resistance layer and material composition are regulated to adjust equivalent series resistance, then the equivalent series resistance can be adjusted, but the manufacturing complexity increases significantly
Solution Approach 1:
The patent changes the structural parameter of the electrode connections rather than regulating the thickness and material composition of the inner resistance layer. By altering the connection configuration (which inner electrodes connect to which terminal electrodes), the equivalent series resistance can be adjusted to desirable values without increasing manufacturing complexity, as this structural parameter change is easier to implement during the lamination process.
Data Source
AI summary
A multilayer capacitor has a multilayer body in which multiple dielectric layers and multiple inner electrodes are alternately laminated, and multiple terminal electrodes formed on the multilayer body. The multiple inner electrodes include multiple first inner electrodes and multiple second inner electrodes alternately arranged. The multiple terminal electrodes include first and second terminal electrodes electrically insulated from each other. The multiple first inner electrodes are electrically connected to each other by way of a through-hole conductor. The multiple second inner electrodes are electrically connected to each other by way of a through-hole conductor.