Coil Conductor Layout for High-Q Compact Inductors
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Solution Overview
Problem
Existing coil components struggle to maintain both high inductance and Q value for electric signals in a relatively high frequency band while achieving compactness.
Innovation Solution
The coil component design includes a configuration where the first coil conductor is separated from the second external electrode along a specific direction, with subsequent coil conductors extending to increase the distance from the side surface as they approach the end surface, and the region surrounded by the coil is shaped to maximize area, ensuring both inductance and Q value are secured.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the area of the region surrounded by the coil is increased to secure inductance, then the inductance is improved, but the distance between the coil and external electrode becomes shorter causing Q value to decrease
Solution Approach 1:
The patent applies local quality by making different parts of the coil structure have different spatial relationships with external electrodes. Specifically, the first coil conductor is positioned to avoid overlapping with the second external electrode when viewed along the second direction, while subsequent coil conductors are arranged to maximize the enclosed area. This localized differentiation allows the coil to maintain both large enclosed area for inductance and appropriate spacing from external electrodes for Q value.
2Reliability
If the coil structure is optimized to maintain Q value for high frequency signals, then the Q value is improved, but the enclosed area is reduced causing inductance to decrease
Solution Approach 1:
The patent utilizes dimensional optimization by carefully arranging coil conductors in three-dimensional space. The first coil conductor extends along the first direction and is separated from the second external electrode when viewed along the second direction. Subsequent coil conductors are positioned to extend toward the second end surface while increasing their distance from the side surface. This multi-dimensional arrangement maximizes the enclosed area without compromising the spacing needed for Q value.
3Volume of moving object
If the coil component is made more compact to reduce size, then the compactness is improved, but the distance between coil and external electrode becomes shorter causing Q value to decrease
Solution Approach 1:
The patent applies nesting by arranging multiple coil conductors in a compact configuration where each conductor is positioned within the element body in a specific spatial relationship. The first coil conductor is nested such that it does not overlap with the second external electrode when viewed along the second direction, while subsequent conductors are nested to extend toward the second end surface with increasing distance from the side surface. This nested arrangement achieves compactness while maintaining the necessary spacing for Q value.
Data Source
AI summary
In a coil component, each of a plurality of coil conductors is connected at an end thereof to another coil conductor of the plurality of coil conductors. The plurality of coil conductors include a first coil conductor and a second coil conductor. The first coil conductor extends along a Y-axis direction. The second coil conductor is connected to the first coil conductor. The second coil conductor extends from the first coil conductor toward a second end surface such that the shortest distance from a side surface to the second coil conductor increases as the second coil conductor approaches the second end surface. When viewed along a second direction orthogonal to a direction of a coil axis of a coil and a first direction, the first coil conductor does not overlap a portion which is closest to the first coil conductor in the second side surface electrode portion.