Multilayer Electronic Component Asymmetric Coil Radius Arrangement
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Solution Overview
Problem
Multilayer electronic components with straightly aligned coil electrodes exhibit projections and depressions on their surface, leading to poor connections with printed circuit boards and electronic components, resulting in instability and potential detachment.
Innovation Solution
The use of ring-shaped inner electrodes with varying radii, alternately arranged in a stacking direction, and partially overlapping each other to minimize thickness differences and prevent surface irregularities, along with insulating layers of different thicknesses, ensures a smoother surface and improved structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If coil electrodes are arranged in a straight line in the stacking direction, then the coil structure is simple and easy to manufacture, but projections and depressions are formed on the surface of the multilayer body
Solution Approach 1:
The patent applies asymmetry by arranging coil electrodes of different radii (first radius and second radius smaller than the first) in an asymmetric pattern rather than a straight line. Specifically, coil electrodes with the first radius are arranged at odd-numbered positions in the stacking direction, while coil electrodes with the second radius are arranged at even-numbered positions, creating an alternating asymmetric arrangement that prevents surface projections and depressions
Solution Approach 2:
The patent transitions from a one-dimensional straight-line arrangement to a two-dimensional alternating pattern by varying the radius dimension. Coil electrodes are arranged with alternating radii (first radius and second radius) in the stacking direction, effectively using the radius dimension to distribute the coil structure and eliminate surface irregularities
2Reliability
If the number of coil electrodes is increased, then the inductance is increased, but the projections and depressions on the surface become more severe
Solution Approach 1:
The patent uses asymmetric arrangement with two different radii (first radius and second radius) to distribute the increased number of coil electrodes. By alternating between the two radii in the stacking direction, the inductance can be increased while the surface remains flat, as the varying radii prevent cumulative protrusion effects
Solution Approach 2:
The patent changes the radius parameter of coil electrodes to solve the contradiction. By alternating between coil electrodes with a first radius and coil electrodes with a second radius (smaller than the first) in the stacking direction, the inductance is enhanced while surface flatness is maintained through parameter variation
3Device complexity
If projections and depressions exist on the surface of the multilayer body, then the coil structure is formed, but poor connection and detachment occur with the printed circuit board
Solution Approach 1:
The asymmetric alternating arrangement of coil electrodes with different radii eliminates surface projections and depressions, providing a flat mounting surface that ensures reliable connection with the printed circuit board and prevents detachment, while still maintaining the necessary coil structure complexity
4Adaptability or versatility
If electronic components are mounted on the surface of the multilayer body with projections and depressions, then the component integration is achieved, but poor connection and detachment occur
Solution Approach 1:
The asymmetric alternating radius arrangement provides a flat surface that enables reliable mounting of electronic components, ensuring good connection and preventing detachment while maintaining the ability to integrate multiple components on the multilayer body surface
Data Source
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AI summary
A multilayer electronic component that can suppress the formation of projections and depressions on a surface and an electronic component unit including the multilayer electronic component are provided. Coil electrodes (8) having a shape of ring-shaped wiring with a part removed therefrom are electrically connected to each other to constitute a coil (L). Magnetic layers (4) are stacked together with the plurality of coil electrodes (8). The coil electrodes (8a, 8c, 8e) having a radius r1 and the coil electrodes (8b, 8d) having a radius r2 that is smaller than the radius r1 are alternately arranged in a stacking direction.