Capacitor With Varying Diameter Through-Holes For Insulation
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Solution Overview
Problem
Porous capacitors face a challenge in improving insulation breakdown withstand voltage while maintaining capacity, as thicker dielectric layers enhance insulation but decrease capacitance.
Innovation Solution
The capacitor design features through-holes with varying diameters in the dielectric layer, where internal electrodes are connected to external electrodes at specific diameter parts, concentrating the electric field at thicker sections for improved insulation and maintaining capacitance by keeping most electrode distances consistent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dielectric layer thickness is increased to improve insulation breakdown withstand voltage, then insulation properties are improved, but the capacity of the capacitor is decreased
Solution Approach 1:
The through-hole structure implements local quality by creating different hole diameter sections: a first hole diameter section with larger diameter and a second hole diameter section with smaller diameter. This allows the dielectric layer to have different effective thicknesses at different locations within the same through-hole, providing both insulation improvement (at the narrower section) and capacity maintenance (at the wider section) simultaneously.
Solution Approach 2:
The through-hole is segmented into multiple diameter sections along its length. The first hole diameter part and second hole diameter part create distinct functional zones: the upper section maintains larger electrode spacing for capacity, while the lower section provides thicker dielectric for insulation breakdown resistance.
2Reliability
If the facing distance of internal electrodes is increased to improve insulation, then insulation breakdown withstand voltage is improved, but the capacity is decreased
Solution Approach 1:
The internal electrode configuration implements local quality by positioning electrodes at different depths within the through-hole diameter sections. The electrodes face each other with appropriate spacing in the first hole diameter part for capacity, while maintaining sufficient separation in the second hole diameter part for insulation breakdown resistance.
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 insulation breakdown withstand voltage while minimizing the decrease in capacitor capacity, achieving improved performance in both aspects.
Implementation Method 1
concentrating the electric field at thicker sections for improved insulation
Data Source
AI summary
A capacitor includes a dielectric layer having a first plane, a second plane opposite to the first plane, and first and second through-holes communicated with the first plane and the second plane; a first external conductor layer disposed on the first plane; a second external conductor layer disposed on the second plane; a first internal electrode formed in the first through-hole, connected to the first external electrode layer, disposed in the second hole diameter part at a tip and separated from the second external electrode layer; and a second internal electrode formed in the second through-hole, connected to the second external electrode layer, and separated from the first external electrode layer.