Multilayer Inductor Coil Conductor Thickness Design
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Solution Overview
Problem
Multilayer inductors experience a decrease in resonant frequency due to stray capacitance generated between outer electrodes and coil-forming conductor patterns, which is not effectively addressed by existing technologies.
Innovation Solution
The electronic component design features coil conductors with a smaller thickness in the stacking direction for those directly connected to outer electrodes, reducing stray capacitance by minimizing the area facing the electrodes, thereby maintaining or increasing the resonant frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coil conductors are directly connected to outer electrodes with standard thickness, then electrical connection is ensured, but stray capacitance increases causing resonant frequency to decrease
Solution Approach 1:
The patent applies local quality by making the thickness of coil conductors position-dependent: conductors directly connected to outer electrodes have reduced thickness compared to other conductors. This local modification reduces the area facing outer electrodes, thereby reducing stray capacitance at critical locations while maintaining electrical connection reliability.
Solution Approach 2:
The patent changes the physical parameter of conductor thickness based on position. By reducing the thickness parameter of specific coil conductors that are directly connected to outer electrodes, the patent effectively reduces stray capacitance and prevents resonant frequency decrease, while other conductors maintain standard thickness for optimal electrical performance.
2Object-affected harmful factors
If coil conductor thickness is reduced to reduce stray capacitance, then resonant frequency is maintained, but inductance may decrease
Solution Approach 1:
The patent applies local quality by selectively reducing thickness only for coil conductors directly connected to outer electrodes, while other conductors maintain standard thickness. This localized approach minimizes the impact on total inductance while effectively reducing stray capacitance at the critical interface with outer electrodes.
Solution Approach 2:
The patent applies partial action by reducing the thickness of only certain coil conductors (those directly connected to outer electrodes) rather than all conductors. This partial modification is sufficient to reduce stray capacitance and maintain resonant frequency without causing excessive reduction in overall inductance.
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 effectively suppresses the decrease in resonant frequency by reducing stray capacitance, as demonstrated through computer simulations, while maintaining or enhancing inductance and reducing direct-current resistance.
Implementation Method 1
a plurality of coil conductors 18a to 18g stacked together with the insulating layers 16a to 16h to form a coil L
Implementation Method 2
stray capacitance generated between outer electrodes and coil-forming conductor patterns
Data Source
AI summary
This disclosure provides an electronic component that can suppress a decrease in the resonant frequency. The electronic component includes a multilayer body having plural insulating layers stacked in a staking direction. Outer electrodes are provided on facing lateral sides of the multilayer body and extend in the stacking direction. Coil conductors are stacked together with the insulating layers to form a coil. The thickness in the stacking direction of at least one of the coil conductors that is directly connected to one of the outer electrodes is smaller than that of the coil conductors that are not directly connected to any of the outer electrodes.