Coil Component Lead-Out Layout for Electrode Orientation
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Solution Overview
Problem
In coil components where the length and width are similar, it is difficult to specify the surface for lead-out portions, making it challenging to determine the correct placement for external electrodes.
Innovation Solution
A coil component design featuring a body with opposing surfaces and internal insulating layers, where coil patterns and lead-out portions are strategically exposed to different surfaces, allowing for easy identification and connection of external electrodes without requiring identification marks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the body has similar length and width values, then the component achieves compactness and space efficiency, but it becomes difficult to specify the surface for lead-out portions and external electrode placement
Solution Approach 1:
The patent introduces asymmetric features on the body surfaces to enable identification. Specifically, it provides reference marks (protrusions or凹陷) on four side surfaces of the cylindrical body, where at least one reference mark differs from others in position, shape, or depth. This asymmetric marking system allows the manufacturing apparatus to identify specific surfaces for lead-out portion exposure and external electrode placement, resolving the orientation ambiguity caused by the body's similar length and width dimensions.
2Reliability
If lead-out portions are exposed to multiple surfaces, then connection reliability is improved, but the complexity of specifying and controlling their positions increases
Solution Approach 1:
The patent introduces reference marks as intermediary features that mediate between the body geometry and the lead-out portion positioning. These reference marks (protrusions or凹陷 on side surfaces) serve as intermediate reference points that guide the manufacturing apparatus in determining which surfaces should have lead-out portions exposed and where external electrodes should be placed. This intermediary system simplifies the control of multi-surface lead-out exposure while ensuring reliable connections.
Solution Approach 2:
The reference marks are formed in advance during the body forming process, before the coil winding and lead-out portion formation steps. This preliminary action establishes a fixed reference framework that guides subsequent manufacturing steps, allowing the lead-out portions to be correctly positioned on multiple surfaces without increasing overall process complexity.
Data Source
AI summary
A coil component includes a body, an internal insulating layer disposed in the body, and a coil portion disposed on the internal insulating layer. The coil portion includes first and second coil patterns disposed on opposing surfaces of the internal insulating layer, respectively, first main and first auxiliary lead-out portions extending from the first coil pattern and respectively exposed to a front surface and one side surface of the body connected to each other, and second main and second auxiliary lead-out portions extending from the second coil pattern and respectively exposed to a rear surface and another side surface of the body connected to each other.