Feedthrough Multilayer Capacitor Through-Hole Grounding
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Solution Overview
Problem
Feedthrough multilayer capacitors face a contradiction in increasing both capacity and equivalent series resistance, as the number of laminated layers enhances capacitance but decreases equivalent series resistance due to increased lead portions connected in parallel, making it difficult to meet demands for both greater capacity and resistance.
Innovation Solution
The capacitors are designed with a through-hole conductor connecting inner electrodes, allowing the number and position of lead portions to be adjusted, ensuring that only a subset of grounding inner electrodes are directly connected to terminal electrodes, thereby increasing equivalent series resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of laminated layers is increased to enhance capacitance, then capacity is improved, but equivalent series resistance decreases due to increased lead portions connected in parallel
Solution Approach 1:
The patent extracts the grounding function from multiple lead portions and consolidates it through a through-hole conductor. Specifically, multiple grounding inner electrodes are connected to a single grounding terminal electrode via one through-hole conductor, reducing the number of parallel resistance paths from multiple lead portions to a single controlled path, thereby increasing equivalent series resistance while maintaining capacitance enhancement from multiple layers
Solution Approach 2:
The through-hole conductor acts as an intermediary element that connects multiple grounding inner electrodes to the grounding terminal electrode. This intermediary structure allows control over the number of parallel resistance paths, enabling the design to achieve both high capacitance (through multiple layers) and high equivalent series resistance (through controlled parallel paths in the through-hole conductor)
Data Source
AI summary
A feedthrough multilayer capacitor includes a capacitor body, at least two signal terminal electrodes, and at least one grounding terminal electrode. The capacitor body has 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 two signal terminal electrodes, while the second grounding inner electrode is connected to one grounding terminal electrode. The first grounding inner electrode is connected to only the second grounding inner electrode through a through-hole conductor.