Wire-Type Capacitor Structure for Higher Capacitance Density
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Solution Overview
Problem
Multilayer ceramic capacitors (MLCCs) face limitations in capacitance per unit volume due to decreased breakdown voltage (BDV) and structural capacitance limits from thinning and area stacking methods, hindering miniaturization and high-capacitance requirements in IT products.
Innovation Solution
A capacitor component utilizing wire-type unit devices with alternating dielectric and metal coatings on metal wires, featuring first and second unit devices with central and outer electrodes, and external electrodes connected across opposing surfaces, allowing capacitance generation within and between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the dielectric and internal electrodes are thinned to increase capacitance per unit volume, then the breakdown voltage decreases
Solution Approach 1:
The capacitor is divided into multiple unit devices, each with its own central electrode, central dielectric, outer electrode, and outer dielectric. These unit devices are arranged side by side within a single body, allowing the capacitance to be distributed across multiple segments rather than relying on a single thinned structure. This segmentation enables achieving high capacitance per unit volume without excessive thinning that would compromise breakdown voltage.
2Quantity of substance
If area stacking method is used to increase capacitance, then the structural capacitance limit is reached
Solution Approach 1:
The patent transitions from a two-dimensional area stacking approach to a three-dimensional configuration by introducing unit devices with radial electrode and dielectric layering around central electrodes. This dimensional change allows capacitance formation in both axial and radial directions, effectively utilizing the volume of the body rather than just the surface area, thereby overcoming the structural capacitance limit of conventional area stacking methods.
3Quantity of substance
If wire-type unit devices are used to improve capacitance per unit volume, then the device structure becomes more complex
Solution Approach 1:
Multiple unit devices are merged into a single integrated capacitor structure within one body. The external electrodes connect to multiple central and outer electrodes simultaneously, combining the functionality of multiple wire-type devices into a unified structure. This merging approach achieves high capacitance per unit volume while simplifying the overall device structure and reducing the number of separate components needed.
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
Maximizes capacitance per unit volume by generating capacitance within and between unit devices, enhancing miniaturization and high-capacitance capabilities.
Implementation Method 1
a first unit device extending in a first direction and including a first central electrode, a first central dielectric surrounding the first central electrode
Implementation Method 2
a first central dielectric surrounding the first central electrode in a direction perpendicular to the first direction
Data Source
AI summary
According to an embodiment of the present disclosure, since the outer electrode of the first unit device and the outer electrode of the second unit device may have different polarities, capacitance may be generated in each of the first unit device and the second unit device and capacitance may be generated between the first and second unit devices, thereby maximizing capacitance per unit volume.