Electrolytic Capacitor Dual Conductive Polymer Layer Design
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Solution Overview
Problem
Existing electrolytic capacitors face limitations in withstand voltage characteristics, which are crucial for their performance and reliability, especially as the demand for higher working voltages increases.
Innovation Solution
The electrolytic capacitor design incorporates a first conductive polymer layer with a silane compound and a second conductive polymer layer containing a basic compound, enhancing adhesion and coverage properties to improve withstand voltage characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductive polymer layers are used, then the capacitor structure is simple, but the withstand voltage characteristics are insufficient
Solution Approach 1:
The conductive polymer layer is divided into multiple distinct layers: a first conductive polymer layer containing a silane compound directly on the dielectric layer, and a second conductive polymer layer containing a basic compound on top of the first layer. This segmentation allows each layer to perform specific functions - the first layer provides strong adhesion to the dielectric while the second layer enhances withstand voltage characteristics, thereby resolving the contradiction between improved reliability and increased structural complexity.
Solution Approach 2:
The patent employs composite material structures where the first conductive polymer layer combines conductive polymer with silane compound, and the second conductive polymer layer combines conductive polymer with basic compound. These composite materials provide synergistic effects that improve withstand voltage characteristics beyond what single-material layers could achieve, addressing the reliability improvement need while managing complexity through functional specialization.
2Reliability
If a single conductive polymer layer is used, then the manufacturing process is simple, but the adhesion and coverage properties are insufficient
Solution Approach 1:
The manufacturing process is segmented into sequential steps: first forming the first conductive polymer layer with silane compound on the dielectric layer, then forming the second conductive polymer layer with basic compound on the first layer. This segmentation enables each layer to be optimized for specific properties - the first layer for adhesion and coverage, the second layer for withstand voltage - while maintaining a relatively simple sequential manufacturing process.
Solution Approach 2:
The first conductive polymer layer containing silane compound is formed as a preliminary layer before forming the second conductive polymer layer. This preliminary action ensures strong adhesion and coverage properties are established first, creating a stable foundation that enhances the overall reliability of the capacitor structure without significantly complicating the subsequent manufacturing steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly enhances the electrolytic capacitor's withstand voltage characteristics and reliability, as evidenced by improved performance in voltage testing and capacitance retention under high voltage and temperature conditions.
Implementation Method 1
The first conductive polymer layer contains a first conductive polymer and a first silane compound
Implementation Method 2
The second conductive polymer layer contains a second conductive polymer and a basic compound
Data Source
AI summary
An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer contains a first conductive polymer and a first silane compound. The second conductive polymer layer contains a second conductive polymer and a basic compound. The basic compound may be an amine compound.