Multilayer Coil Component Non-Circular Conductors
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Solution Overview
Problem
Multilayer inductors face poor mountability and deterioration of radio-frequency characteristics due to stray capacitances generated between outer electrodes and coil conductors when outer electrodes are provided on the mounting surface.
Innovation Solution
A multilayer coil component with a non-circular repeating shape of coil conductors and strategically positioned outer electrodes that do not cover the entire main surface, reducing stray capacitances and enhancing mountability and radio-frequency characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If outer electrodes are provided on the mounting surface, then mountability is improved, but stray capacitances are generated between outer electrodes and coil conductors leading to deterioration of radio-frequency characteristics
Solution Approach 1:
The patent applies asymmetry by using a non-circular repeating shape for the coil conductors (such as rectangular, triangular, or other polygonal shapes) instead of circular patterns. This asymmetric geometry allows strategic positioning of outer electrodes on the mounting surface while maintaining larger distances between electrodes and coil conductors, thereby reducing stray capacitances and improving radio-frequency characteristics while preserving mountability.
2Ease of operation
If outer electrodes cover the entire main surface, then mountability is improved, but stray capacitances increase leading to deterioration of radio-frequency characteristics
Solution Approach 1:
The patent applies local quality by strategically positioning outer electrodes only at specific locations on the mounting surface rather than covering the entire surface. The electrodes are placed at corners or edges of the non-circular coil conductor pattern, which allows for adequate spacing from the coil conductors. This localized electrode placement reduces stray capacitances while still providing sufficient mounting surface area for proper installation.
3Ease of manufacture
If coil conductors are arranged in a rectangular pattern, then manufacturing is simplified, but distances between mounting surface and coil conductors become constant leading to increased stray capacitances
Solution Approach 1:
The patent applies dimensionality change by transitioning from a two-dimensional planar arrangement with constant distances to a three-dimensional configuration where the non-circular coil conductor pattern creates variable distances from the mounting surface. By using rectangular or other polygonal patterns with strategic electrode placement, the design introduces dimensional variation in the electrode-conductor spacing, effectively reducing stray capacitances while maintaining manufacturing simplicity.
Data Source
AI summary
A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and first and second outer electrodes that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively cover parts of first and second end surfaces and parts of a first main surface. A stacking direction of the multilayer body and an axial direction of the coil are parallel to the first main surface. In a plan view from the stacking direction, a repeating shape of the coil conductors is a non-circular shape, and distances between the first main surface and the parts of the coil conductors that face the first main surface are not constant.