Electrolytic Capacitor Dispersion With Insulating Spacers
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Solution Overview
Problem
Conductive polymer adherence to defective dielectric layers or close proximity of anode and cathode portions in electrolytic capacitors leads to decreased withstand voltage and increased leakage current, compromising capacitor performance.
Innovation Solution
A dispersion containing a conductive polymer, insulating fibers or particles, and a dispersion medium is used to form a conductive polymer layer, preventing adherence to defects and maintaining anode-cathode separation, thereby stabilizing capacitor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive polymer layer is formed using a conventional dispersion, then the capacitor can achieve basic conductivity, but the conductive polymer may adhere to defective portions of the dielectric layer or bridge gaps between anode and cathode, causing decreased withstand voltage and increased leakage current
Solution Approach 1:
The patent introduces an insulating material as an intermediary substance mixed with the conductive polymer in the dispersion. This insulating material acts as a spacer or barrier that prevents the conductive polymer from directly adhering to defective portions of the dielectric layer or bridging gaps between anode and cathode, thereby maintaining capacitor reliability while preserving conductivity.
Solution Approach 2:
The patent creates a composite material by combining conductive polymer particles with insulating material particles in a dispersion medium. This composite dispersion allows the conductive polymer to provide necessary conductivity while the insulating material components prevent harmful adherence to defects, resolving the contradiction between achieving conductivity and avoiding performance degradation.
2Reliability
If the conductive polymer layer is made thicker to improve conductivity, then electrical performance improves, but the risk of adherence to defects and bridging between electrodes increases
Solution Approach 1:
By formulating a composite dispersion containing both conductive polymer and insulating material, the patent enables the formation of a thicker conductive layer that maintains electrical performance while the insulating material components within the composite prevent excessive thickness from causing bridging between electrodes or adherence to defects.
Solution Approach 2:
The insulating material in the composite dispersion provides localized insulation at critical points where defects or narrow gaps exist, allowing the conductive polymer layer to be thicker in general while maintaining precise local separation where needed, thus resolving the contradiction between overall conductivity and local separation precision.
Data Source
AI summary
The dispersion disclosed herein is a dispersion used for manufacturing an electrolytic capacitor, including a conductive polymer, an insulating material, and a dispersion medium. The insulating material contains at least one kind of material selected from the group consisting of insulating fibers and insulating particles.