Solid Electrolytic Capacitor Layout for Flexible Via Placement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solid electrolytic capacitors face challenges in ensuring flexibility in via conductor installation while minimizing the risk of short circuits, particularly due to limitations in conductive layer space and accuracy in manufacturing processes.
Innovation Solution
The proposed solid electrolytic capacitor design includes an anode plate with a porous layer, a dielectric layer, a solid electrolyte layer, a conductor layer, and an insulating layer that covers at least a part of the end portion of the solid electrolyte layer, thereby reducing the risk of short circuits and enhancing flexibility in conductor placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the formation range of the cathode is made larger than the solid electrolyte layer to expand the range for via conductor provision, then the flexibility in installation spot of the via conductor is improved, but the risk of causing a short circuit increases due to potential contact between the cathode and uncovered spots of the porous portion
Solution Approach 1:
An insulating layer is introduced as an intermediary between the cathode and the porous portion surface. This insulating layer extends beyond the solid electrolyte layer boundary and covers the cathode, preventing direct contact between the cathode and any uncovered spots of the porous portion, thus eliminating the short circuit risk while allowing the cathode to extend beyond the solid electrolyte layer for via conductor flexibility
Solution Approach 2:
The insulating layer is formed in advance before the cathode is applied, and it is designed to extend beyond the solid electrolyte layer boundary. This preliminary action ensures that when the cathode is subsequently formed to extend beyond the solid electrolyte layer, the insulating layer is already in place to prevent short circuits, enabling flexible via conductor installation without reliability compromise
2Reliability
If the cathode is restricted to a smaller range to reduce short circuit risk, then the reliability is improved, but the flexibility in installation spot of the via conductor deteriorates due to limited conductive layer space
Solution Approach 1:
The insulating layer serves as a mediator that decouples the relationship between cathode size and short circuit risk. By providing this intermediate protective layer, the cathode can be extended to a larger area without increasing short circuit risk, thus improving via conductor installation flexibility while maintaining reliability
3Manufacturing precision
If the conductor layer space is limited to ensure manufacturing accuracy, then the manufacturing precision is improved, but the flexibility in installation spot of the via conductor deteriorates
Solution Approach 1:
The structure is segmented into distinct functional layers: the solid electrolyte layer for capacitance function, and the insulating layer for protection and flexibility enhancement. This segmentation allows the insulating layer to extend beyond the solid electrolyte layer boundary, providing additional space for via conductor installation without affecting the manufacturing precision of the capacitor core structure
Solution Approach 2:
The insulating layer acts as an intermediary zone that provides additional working space for via conductor installation. This intermediate layer does not interfere with the manufacturing precision of the capacitor structure while enabling greater flexibility in via conductor placement
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 design effectively reduces the risk of short circuits while ensuring flexibility in via conductor installation, thereby improving process reliability and enabling finer pattern layouts compared to existing technologies.
Implementation Method 1
an anode plate (10) including a porous layer (12) at least on at least one main surface thereof
Implementation Method 2
a dielectric layer (20) on a surface of the porous layer (12)
Data Source
AI summary
A solid electrolytic capacitor that includes: an anode plate including a porous layer at least on at least one a main surface thereof; a dielectric layer on a surface of the porous layer; a solid electrolyte layer on a surface of the dielectric layer; a conductor layer on a surface of the solid electrolyte layer; and an insulating layer on the surface of the dielectric layer, wherein the insulating layer covers at least a part of an end portion of the solid electrolyte layer in a region surrounding the solid electrolyte layer.