Coil Component Segmented Electrode Volume Reduction
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Solution Overview
Problem
The challenge is to enhance the inductance characteristics and reduce the size of coil components while maintaining their efficiency, particularly in compact electronic devices where space is limited and the number of components is increasing.
Innovation Solution
The solution involves a coil component design with a body having a substrate and a coil unit, where lead-out portions and sub lead-out portions are strategically positioned to minimize electrode volume, allowing for a larger effective volume and improved inductance, and external electrodes are formed on the mounting surface for size reduction and integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional coil component design with larger electrodes is used, then electrode connection reliability is improved, but effective volume of the body decreases and inductance characteristics deteriorate
Solution Approach 1:
The electrode structure is segmented into lead-out portions extending from the coil pattern and sub lead-out portions positioned separately, allowing optimized spatial arrangement that reduces total electrode volume while maintaining connection reliability
Solution Approach 2:
External electrodes are formed on the mounting surface (first surface) of the body rather than extending through the thickness direction, utilizing the surface area dimension to reduce the volume occupied by electrodes within the body
2Reliability
If traditional coil component design with larger electrodes is used, then electrode connection reliability is improved, but inductance characteristics deteriorate
Solution Approach 1:
The electrode structure is segmented into lead-out portions extending from the coil pattern and sub lead-out portions positioned separately, allowing optimized spatial arrangement that reduces total electrode volume while maintaining connection reliability
Solution Approach 2:
External electrodes are formed on the mounting surface (first surface) of the body rather than extending through the thickness direction, utilizing the surface area dimension to reduce the volume occupied by electrodes within the body
3Volume of moving object
If coil component size is reduced, then integration and compactness are improved, but effective volume decreases and inductance characteristics worsen
Solution Approach 1:
External electrodes are formed on the mounting surface (first surface) of the body rather than extending through the thickness direction, utilizing the surface area dimension to reduce the volume occupied by electrodes within the body
Solution Approach 2:
The maximum size of lead-out portions in the second direction is optimized to be greater than the maximum size of sub lead-out portions, creating an asymmetric configuration that maximizes effective volume while maintaining electrical connection
Data Source
AI summary
A coil component includes: a body having first and second surfaces opposing each other in a first direction, and third and fourth surfaces connecting the first and second surfaces to each other and opposing each other in a second direction; a substrate disposed in the body; a coil unit disposed on the substrate, and including a coil pattern, lead-out portions connected to the coil pattern and contacting the first surface of the body while being spaced apart from the third and fourth surfaces of the body, respectively, and sub lead-out portions spaced apart from the coil pattern; and external electrodes disposed on the first surface of the body and connected to the lead-out portions, respectively, wherein each of the sub lead-out portions occupies a smaller volume within the body than each of the lead-out portions.