Feedthrough Multilayer Capacitor Segmented Grounding
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Solution Overview
Problem
Conventional feedthrough multilayer capacitors face a contradiction between increasing capacity and equivalent series resistance, as the number of laminated layers enhances capacitance but decreases equivalent series resistance due to increased lead portions, making it difficult to meet demands for both greater capacity and resistance.
Innovation Solution
The design involves connecting inner electrodes with surface conductors on the capacitor body, allowing the number and position of lead portions to be adjusted, ensuring the equivalent series resistance can be set to a desirable value, even with a constant number of laminated layers, by disconnecting some grounding inner electrodes from terminal electrodes and using connecting conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of laminated layers is increased to enhance capacitance, then the capacitance increases, but the equivalent series resistance decreases due to increased lead portions
Solution Approach 1:
The grounding inner electrodes are segmented into two groups: those directly connected to terminal electrodes and those connected only through connecting conductors. This segmentation allows selective control of resistance paths, enabling increased equivalent series resistance even with multiple laminated layers for high capacitance.
Solution Approach 2:
Connecting conductors are introduced as intermediary elements between grounding inner electrodes and terminal electrodes. By using these intermediate connection paths with higher resistance characteristics, the equivalent series resistance can be increased while maintaining the capacitance-enhancing multi-layer structure.
2Ease of operation
If the number of lead portions is increased to connect all inner electrodes, then the connectivity improves, but the equivalent series resistance decreases due to parallel resistance paths
Solution Approach 1:
The connection paths are segmented into direct lead portions and indirect connecting conductor portions. Not all inner electrodes are connected through lead portions; some are connected only through connecting conductors, reducing the number of parallel resistance paths and increasing equivalent series resistance.
Solution Approach 2:
Different connection methods are applied to different grounding inner electrodes based on local requirements. Some electrodes use direct lead connections for low resistance, while others use connecting conductor paths for higher resistance, allowing tailored control of equivalent series resistance.
Data Source
AI summary
A feedthrough multilayer capacitor has a capacitor body, at least two signal terminal electrodes, at least one grounding terminal electrode, and at least one connecting conductor. The capacitor body includes a plurality of insulator layers laminated, a signal inner electrode and a first grounding inner electrode which are arranged so as to oppose each other with at least one insulator layer in between, and a second grounding inner electrode arranged so as to oppose the signal inner electrode or first grounding inner electrode with at least one insulator layer in between. The signal inner electrode is connected to the signal terminal electrodes. The first grounding inner electrode is connected to the connecting conductor. The second grounding inner electrode is connected to the grounding terminal electrode and connecting conductor.