Coil Component Wiring Layout for Stronger Joints and Lower Stray Capacitance
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Solution Overview
Problem
Existing coil components face challenges in maintaining strong connections between the coil and internal conductor while minimizing stray capacitance.
Innovation Solution
The coil component design includes a connecting body in the third wiring that extends along the first direction, with a larger overlapping region and a non-overlapping region adjacent to the first wiring, enhancing connection strength and reducing stray capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the third wiring directly connects the internal conductor and the second conductor without a connecting body, then the device complexity is reduced, but the connection strength between the coil and internal conductor deteriorates
Solution Approach 1:
A connecting body is introduced as an intermediary component between the internal conductor and the third conductor. This connecting body includes a first portion that contacts the internal conductor and a second portion that contacts the third conductor, thereby mediating the connection and improving connection strength while distributing mechanical stress across multiple contact points
2Strength
If the connecting body has a large overlapping region with the third conductor, then the connection strength is improved, but the stray capacitance increases
Solution Approach 1:
The connecting body is segmented into distinct functional portions: a first portion that overlaps with the third conductor to provide strong electrical connection, and a second portion that extends without overlapping to minimize capacitance. This segmentation allows optimization of connection strength and stray capacitance independently in different spatial regions
3Object-generated harmful factors
If the second portion of the connecting body is positioned adjacent to the first wiring with the first portion between them, then the stray capacitance is reduced, but the device complexity increases
Solution Approach 1:
The connecting body utilizes three-dimensional spatial arrangement to resolve the capacitance issue. By positioning the second portion in a different spatial location (adjacent to but separated from the first wiring by the first portion), the design reduces electromagnetic coupling in the critical dimension while maintaining connection functionality through vertical or lateral stacking
Data Source
AI summary
A coil component includes an element body, an external conductor, a coil, and an internal conductor. The coil has a first wiring, a second wiring, and a third wiring. The third wiring includes a connecting body and a third conductor. The connecting body includes a first portion adjacent to the first wiring. The first portion includes a region overlapping the third conductor as viewed from the first direction. The connecting body does not overlap the third conductor as viewed from the first direction, and includes a second portion adjacent to the first wiring with the first portion positioned therebetween. An area of a region defined by an outer edge of the connecting body as viewed from the first direction is larger than an area of a region defined by an outer edge of the third conductor as viewed from the first direction.