Multilayer Coil Layout to Limit Stray Capacitance in Compact Components
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Solution Overview
Problem
Existing electronic components face challenges in achieving both compactness and desired coil characteristics, particularly due to stray capacitance issues arising from reduced conductor layer distances, which affect inductance and Q value.
Innovation Solution
The conductor layers are arranged such that their widths in a direction orthogonal to their extending direction are larger than the shortest distance between them, with intersecting extending directions, and connected through connection conductors to reduce the electric current path length and improve current distribution, thereby enhancing inductance and Q value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the width of the conductor layer is increased to reduce inductance, then the inductance decreases, but the shortest distance between adjacent conductor layers is reduced, generating stray capacitance
Solution Approach 1:
The patent applies dimensionality change by arranging conductor layers in three-dimensional space with alternating orientations. Specifically, first conductor layers extend in a first direction while second conductor layers extend in a second direction that is different from the first direction, creating a立体 configuration that reduces inductance while maintaining adequate spacing to minimize stray capacitance between adjacent layers
Solution Approach 2:
The patent employs asymmetry by using conductor layers with different extending directions (first direction vs. second direction) and different positional arrangements (arranged along coil axis vs. at different positions in stacking direction). This asymmetric configuration optimizes the balance between inductance reduction and stray capacitance minimization
2Volume of moving object
If the element body size is kept the same, then compactness is maintained, but increasing conductor layer width reduces the distance between layers, affecting coil characteristics
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement by stacking multiple insulator layers and positioning conductor layers at different heights and orientations within the element body. This vertical and angular distribution allows the coil to achieve desired characteristics while maintaining compact element body dimensions
Solution Approach 2:
The patent implements nesting by placing the coil structure inside the element body, with conductor layers nested between insulator layers. The alternating first and second conductor layers are positioned at different heights within the stacked insulator layers, creating a compact nested configuration that fits within the element body while maintaining proper spacing
Data Source
AI summary
In an electronic component, a plurality of conductor layers extend in a direction that intersects a coil axis and that is along insulator layers. Each of the plurality of connection conductors is connected to a corresponding conductor layer among the plurality of conductor layers, and extends in a stacking direction. In the conductor layers adjacent to each other in a direction along the coil axis among the plurality of conductor layers, a width in a direction orthogonal to an extending direction of each of the conductor layers is larger than a shortest distance between the conductor layers adjacent to each other. An extending direction of each of first conductor layers and an extending direction of at least one second conductor layer intersect each other when viewed in the stacking direction, and are inclined to a direction that is orthogonal to the coil axis and that is along the insulator layers.