Capacitor Manufacturing Using Conductive Polymer Solution
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Solution Overview
Problem
Existing capacitor manufacturing methods using π-conjugated conductive polymers face challenges with low conductivity, high leakage current, and poor productivity due to complex processes and inefficient polymerization methods.
Innovation Solution
A capacitor design incorporating a valve metal anode, oxidized dielectric layer, and a solid electrolyte layer containing a π-conjugated conductive polymer and polyanion, with a direct current voltage applied between the anode and cathode, and a resin component to reduce leakage current, enhancing conductivity and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrolytic polymerization method is used to form solid electrolyte layer, then a conductive polymer layer can be formed, but the process becomes extremely complex and requires pre-forming manganese oxide layer which has poor conductivity
Solution Approach 1:
The invention extracts and eliminates the complex electrolytic polymerization process and the pre-required manganese oxide layer formation step. Instead, it directly applies a conductive polymer solution containing π-conjugated conductive polymer and polyanion to the dielectric layer surface, followed by simple heating treatment, thereby removing the disturbing complex steps while achieving the desired conductive electrolyte layer.
Solution Approach 2:
The invention replaces the complex, multi-step electrolytic polymerization process with a simple, direct coating method using a pre-prepared conductive polymer solution. This disposable-like approach applies the conductive polymer directly from solution without requiring complex in-situ polymerization equipment or pre-formed manganese oxide layers, significantly simplifying the manufacturing process.
2Manufacturing precision
If chemical oxidative polymerization is performed repeatedly to ensure sufficient film thickness, then a satisfactory electrolyte layer can be formed, but the polymerization time becomes very long and production efficiency is poor
Solution Approach 1:
The invention performs preliminary action by pre-forming the conductive polymer and polyanion in a solution state before application. This allows the electrolyte layer to be deposited in a single coating step with sufficient thickness, eliminating the need for repeated polymerization cycles and significantly improving production efficiency while maintaining manufacturing precision.
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
The proposed solution results in a capacitor with high conductivity and minimal leakage current, achieved through improved manufacturing processes that increase productivity and capacitance while reducing equivalent series resistance (ESR).
Implementation Method 1
an electrolytic oxidation step of forming a dielectric layer by electrolytically oxidizing the surface of an anode composed of a valve metal
Implementation Method 2
an application step of performing a treatment in which a direct current voltage is applied between the anode and the cathode
Data Source
AI summary
A method for manufacturing a capacitor that enables a capacitor having a high degree of conductivity and minimal leakage current to be obtained with a high level of productivity. A method for manufacturing a capacitor (10) according to the present invention includes an electrolytic oxidation step of forming a dielectric layer (12) by electrolytically oxidizing the surface of an anode (11) composed of a valve metal, a cathode positioning step of positioning a cathode (13) composed of a conductor in an opposing arrangement on the surface of the dielectric layer (12), a solid electrolyte formation step of forming a solid electrolyte layer (14) between the dielectric layer (12) and the cathode (13) using a conductive polymer solution containing a π-conjugated conductive polymer and a polyanion, and an application step of performing a treatment in which a direct current voltage is applied between the anode (11) and the cathode (13).