Void-Structured Inductor Component for Higher Self-Resonant Frequency
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Solution Overview
Problem
Conventional inductor components have high relative permittivity, limiting the achievement of a high self-resonant frequency (SRF).
Innovation Solution
Incorporating voids in the element body, particularly in regions near the coil, reduces the relative permittivity and enhances SRF while maintaining structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the element body is made of conventional glass material, then the structural strength is ensured, but the relative permittivity is high and SRF cannot be made high
Solution Approach 1:
The element body incorporates voids (air pockets) within the glass matrix, creating a porous structure. These voids reduce the overall relative permittivity of the element body material, enabling higher SRF while the glass matrix maintains structural strength. The voids are distributed throughout the element body, particularly in regions that do not compromise mechanical integrity.
Solution Approach 2:
The element body is formed as a composite material combining glass and air voids. This composite structure allows the glass to provide mechanical strength while the air voids reduce the effective permittivity. The combination enables simultaneous achievement of structural reliability and high SRF performance that cannot be obtained with conventional homogeneous glass materials.
2Reliability
If voids are introduced in the element body to reduce relative permittivity, then SRF increases, but the strength of the element body may be compromised
Solution Approach 1:
The voids are strategically distributed within the element body rather than uniformly throughout. The density and size of voids are controlled to create local variations in permittivity while maintaining adequate structural strength in critical regions. This local quality approach allows optimization of SRF in specific areas without compromising overall structural integrity.
Solution Approach 2:
The size, shape, and distribution parameters of the voids are carefully controlled and optimized. By adjusting these parameters, the effective permittivity is reduced to achieve high SRF while the structural strength is maintained within acceptable ranges. The void dimensions are kept small enough to avoid significant mechanical weakening.
3Strength
If multiple voids are dispersed in the element body, then the impact resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The element body is segmented into multiple regions containing individual voids rather than one large void. This segmentation distributes impact energy throughout the structure, improving impact resistance. The multiple smaller voids are easier to incorporate during manufacturing compared to creating and controlling large void structures.
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 introduction of voids in the element body increases SRF and ensures the structural integrity of the inductor component.
Implementation Method 1
the relative permittivity of the element body is high, and a high self-resonant frequency (SRF) may not be obtained... since the element body includes the voids, the relative permittivity of the element body is lowered and SRF can be made higher
Data Source
AI summary
An inductor component comprising an element body; and a coil disposed in the element body and wound along an axial direction. The element body includes a void which exists at least in a region within 10 μm from the coil.