Coil Electronic Component Bent Conductors
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Solution Overview
Problem
As electronic devices become more multifunctional and miniaturized, thin coil components face issues with connection reliability and structural rigidity due to external forces, leading to reduced reliability and increased electrical resistance or open defects at the connection points between the coil and external electrodes.
Innovation Solution
The coil electronic component incorporates an insulating substrate with coil portions and a body embedded within, featuring lead-out portions and connection portions with bent conductors that increase the embedded length and spacing of connecting conductors, enhancing structural rigidity and connection reliability by increasing contact areas and securing the coil and external electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the coil component is thinned to achieve miniaturization, then the size of the component is reduced, but the connection reliability and structural rigidity at the connection portion deteriorate
Solution Approach 1:
The connection portion extends in the thickness direction (third direction) of the insulating substrate, utilizing the vertical dimension to increase the embedded length of connecting conductors. This dimensional approach allows the connection portion to achieve sufficient mechanical strength and connection reliability without increasing the planar footprint of the component, thus resolving the contradiction between miniaturization and connection reliability.
Solution Approach 2:
The connecting conductors include bent portions that increase the embedded length of the connection portion. The curved/bent geometry of the conductors provides enhanced mechanical anchoring and distributes stress more effectively, improving connection reliability while maintaining a compact overall structure suitable for miniaturized components.
2Volume of moving object
If the coil component is thinned to achieve miniaturization, then the size of the component is reduced, but the structural rigidity at the connection portion deteriorates
Solution Approach 1:
The connection portion utilizes the thickness direction of the insulating substrate to extend the embedded length of connecting conductors. This vertical extension provides enhanced structural rigidity and mechanical strength at the connection portion without increasing the lateral dimensions of the component, thus maintaining rigidity in miniaturized devices.
Solution Approach 2:
The bent portions of the connecting conductors increase the embedded length and provide mechanical reinforcement at the connection portion. The curved geometry distributes mechanical stresses more effectively and enhances the structural rigidity of the connection between the coil portion and external electrode, preventing detachment in thinned components.
3Force
If external force is applied to the connection portion, then the component may withstand mechanical stress, but the connection reliability between conductor and body deteriorates
Solution Approach 1:
The bent portions of the connecting conductors act as mechanical anchors that distribute and absorb applied forces. The curved geometry provides enhanced mechanical interlocking with the encapsulating resin, preventing detachment and maintaining connection reliability even when external forces are applied to the thinned component.
Solution Approach 2:
The connection portion extends in the thickness direction to increase the embedded length of connecting conductors. This vertical extension provides a longer engagement length that distributes mechanical stresses over a greater distance, enhancing the component's ability to withstand external forces while maintaining reliable electrical connections.
Data Source
AI summary
A coil electronic component includes an insulating substrate, a coil portion disposed on at least one surface of the insulating substrate, a body in which the insulating substrate and the coil portion are embedded, a lead-out portion connected to the coil portion and exposed from a surface of the body, and a connection portion including a plurality of connecting conductors each having a bent portion to increase lengths of the plurality of connecting conductors embedded in the body, the plurality of connecting conductors being spaced apart from each other, the connection portion connecting an end of the coil portion to the lead-out portion to each other.