Coil Component Lead Layout for Smaller External Electrodes
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Solution Overview
Problem
The miniaturization of electronic devices has increased the need to minimize the area occupied by external electrodes in coil components, limiting the design flexibility of these components.
Innovation Solution
A coil component design that includes a body with a support substrate having a core and support portions, where the lead portions are bent to be more adjacent to the body's surface than the core, allowing for reduced external electrode area and increased layout design freedom, achieved through a manufacturing process involving plating, bending, and embedding of the coil and lead portions within the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the lead portion is disposed adjacent to the core portion, then the external electrode area is larger, but the layout design freedom is reduced
Solution Approach 1:
The lead portion is positioned in the thickness direction (Z-axis) rather than only in the planar direction, allowing it to be adjacent to the one surface while the core portion remains at a different height level. This vertical separation enables reduced external electrode area while maintaining layout flexibility.
Solution Approach 2:
The support substrate is divided into distinct functional regions: a core portion for mounting the coil and a support portion for mounting the lead. This segmentation allows independent optimization of each region's position, enabling the lead to be disposed adjacent to the surface while the core remains positioned for optimal electrical performance.
2Area of stationary object
If the support portion is disposed adjacent to the one surface, then the external electrode area is minimized, but the structural complexity increases
Solution Approach 1:
The support substrate serves multiple functions: it provides mechanical support for both the core portion and lead portion, establishes electrical connections, and enables the lead to be positioned adjacent to the surface. This multi-functionality reduces the need for additional separate components, thereby minimizing external electrode area without proportionally increasing overall structural complexity.
Data Source
AI summary
A coil component includes a body having one surface and the other surface, opposing each other, and both end surfaces, opposing each other, a support substrate disposed inside the body, and including a core portion, and a support portion connected to the core portion, a coil portion disposed on the core portion, and a lead portion disposed on the support portion and connected to the coil portion to be exposed to one surface of the body. The support portion is disposed to be more adjacent to the one surface of the body than the core portion.