Planar Coil Terminal Structure for Dual-Side Access and Strength
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Solution Overview
Problem
The existing coil components with planar coil patterns have insufficient strength at the terminal parts, which are electrically accessible from both sides, leading to potential mechanical weaknesses and reduced reliability.
Innovation Solution
A coil component design featuring a planar coil pattern with a first resin layer covering one surface and a magnetic body covering the other, including strategically positioned openings and coverages at the terminal parts to enhance mechanical strength and electrical accessibility, while maintaining a compact size and high magnetic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the coil pattern is made electrically accessible from both front and back sides, then electrical accessibility is improved, but strength at the terminal part deteriorates
Solution Approach 1:
The patent applies different structures to different parts of the terminal: the first main surface has a first resin layer with a first opening for electrical access, while the second main surface has a magnetic body with a second opening. This local differentiation allows electrical accessibility from both sides while maintaining strength through the magnetic body coverage on the second surface.
Solution Approach 2:
The terminal part uses a composite structure combining resin material and magnetic body material. The magnetic body not only provides magnetic characteristics but also reinforces the terminal part structure, compensating for the strength reduction caused by dual-side electrical accessibility.
2Ease of operation
If openings are provided at terminal parts for electrical access, then electrical accessibility is improved, but mechanical strength deteriorates
Solution Approach 1:
The first resin layer has a first opening at a specific part of the terminal part for electrical access, while other parts remain covered with the resin layer. Similarly, the magnetic body has a second opening at a different part. This localized opening approach maintains electrical accessibility while preserving structural integrity in other areas.
Solution Approach 2:
The magnetic body is positioned to cover the second main surface of the terminal part, providing structural reinforcement before any mechanical stress is applied. This pre-positioned magnetic body acts as a cushioning support that compensates for the strength reduction caused by the openings.
Data Source
AI summary
Disclosed herein is a coil component that includes a planar coil pattern having first and a second main surfaces opposite to each other, a first resin layer covering the first main surface of the coil pattern, and a magnetic body covering the second main surface of the coil pattern. The coil pattern includes a terminal part positioned at an end thereof. The first resin layer has a first opening at a part of the terminal part. The magnetic body has a second opening at a part of the terminal part. The first main surface of the terminal part has a first part overlapping the first opening and a second part covered with the first resin layer. The second main surface of the terminal part has a third part overlapping the second opening and a fourth part covered with the magnetic body.