Solid Electrolytic Capacitor Parallel Conductors Shared Cathode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing solid electrolytic capacitors with multiple linear conductors face challenges in downsizing and achieving high capacitance due to a high ratio of cathode-side element thickness to product size, which complicates manufacturing and hinders efficient noise filtering in decoupling and power supply circuits.
Innovation Solution
A solid electrolytic capacitor design featuring parallel linear conductors made of valve action metal with a shared conductive polymer layer and conductor layer, where the conductive polymer layer is formed to cover the linear conductors with a dielectric layer interposed, and a laminated conductor layer with a carbon layer and metal layer, allowing for closer arrangement of conductors and reduced manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple linear conductors are arranged in parallel to increase capacitance and reduce ESR, then the capacitance and ESR performance improve, but the cathode-side element thickness to product size ratio increases, complicating manufacturing and preventing downsizing
Solution Approach 1:
The patent merges multiple separate cathode-side elements (conductive polymer layers and conductor layers) into a single shared structure that covers all linear conductors simultaneously. This shared cathode-side element reduces the overall thickness requirement while maintaining electrical connection to all anode elements, thereby resolving the contradiction between achieving low ESR/high capacitance and preventing manufacturing complexity.
Solution Approach 2:
The shared conductive polymer layer and conductor layer serve multiple functions: they provide the solid electrolyte function for all linear conductors simultaneously, act as the cathode electrode for all anodes, and provide electrical connection to all anode elements through a single unified structure. This multi-functionality reduces the number of separate components needed and simplifies the overall device structure.
2Reliability
If multiple separate cathode-side elements are provided for each linear conductor, then electrical connection is ensured, but the number of manufacturing processes increases and downsizing is hindered
Solution Approach 1:
The patent combines multiple separate cathode-side elements into a single shared structure that can be manufactured in one process step. This shared conductive polymer layer and conductor layer structure eliminates the need for separate manufacturing processes for each cathode element, thereby improving ease of manufacture while maintaining reliable electrical connection to all linear conductors.
3Ease of manufacture
If the cathode-side element thickness is increased to ensure proper coverage, then manufacturing reliability improves, but the product size increases and volume efficiency decreases
Solution Approach 1:
By merging multiple cathode-side elements into a single shared structure, the patent achieves proper coverage of all linear conductors with a unified layer of optimized thickness. This approach ensures manufacturing reliability through adequate coverage while minimizing the overall thickness and product size, thereby improving volume efficiency.
Solution Approach 2:
The patent optimizes the thickness parameter of the shared conductive polymer layer and conductor layer to achieve the minimum required thickness for reliable manufacturing and proper coverage. By carefully controlling this parameter, the patent ensures adequate coverage for manufacturing reliability while minimizing the product size and maximizing volume efficiency.
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 enhances volume efficiency, reduces equivalent series resistance (ESR), and increases capacitance, enabling effective noise filtering while simplifying the manufacturing process and reducing component size.
Implementation Method 1
a dielectric layer is formed on a surface of the valve action metal
Implementation Method 2
a conductive polymer layer covering the plurality of linear conductors and shared by the plurality of linear conductors
Implementation Method 3
a laminated conductor layer with a carbon layer and metal layer
Data Source
AI summary
A solid electrolytic capacitor that includes a plurality of linear conductors arranged in parallel and made of a valve action metal in which a dielectric layer is formed on a surface of the valve action metal; a conductive polymer layer covering the plurality of linear conductors and shared by linear conductors; a conductor layer covering conductive polymer layer; an anode terminal in contact with end faces of the plurality of linear conductors; and a cathode terminal electrically connected to conductor layer.