Embedded External Electrode Coil Structure for Higher Effective Volume
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Solution Overview
Problem
In the development of coil components for electronic devices, there is a challenge in achieving high capacitance and efficiency while maintaining a reduced size, which requires optimizing the effective volume and adhesive strength, particularly in the context of miniaturization and integration.
Innovation Solution
The coil component design involves reducing the volume of the electrode by embedding the external electrodes within the body, creating a step difference in the lead-out portions, and using a structure where the outermost surface of the external electrodes is inward of the body's surface, thereby increasing the effective volume and improving adhesive strength when mounted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the external electrode is disposed on the surface of the body, then the electrode can be easily connected to the lead-out portion, but the effective volume of the body is reduced
Solution Approach 1:
The external electrode is embedded into the body such that its outermost surface is positioned inward relative to the body's outer surface. This nesting arrangement allows the electrode to be contained within the body's volume boundaries, increasing the effective volume while maintaining the electrode's functional connection to the lead-out portion through the embedding structure
2Volume of stationary object
If the external electrode volume is reduced to increase effective volume, then inductance characteristics are improved, but adhesive strength during mounting may be compromised
Solution Approach 1:
The external electrode is preliminarily embedded into the body during the manufacturing process, creating a pre-formed connection structure. This preliminary embedding ensures that the electrode maintains proper positioning and connection before the mounting process, preventing adhesive strength issues that might arise from reduced electrode volume
3Volume of moving object
If the component size is reduced for miniaturization, then device integration is improved, but the effective volume for high capacitance is reduced
Solution Approach 1:
The embedding structure creates local optimization within the component. By positioning the external electrode's outermost surface inward relative to the body's outer surface, the design locally increases the effective volume available for magnetic material without increasing the overall component dimensions, thereby maintaining miniaturization while improving inductance characteristics
Data Source
AI summary
A coil component includes a body having one surface and the other surface opposing each other in one direction, a coil portion disposed in the body, the coil portion including a lead-out portion, and an external electrode disposed on the one surface of the body to be connected to the lead-out portion. An outermost surface of the external electrode is disposed of inwards than the one surface of the body.