Spiral Inductor Coil Layout for Higher Inductance and Q Value
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Solution Overview
Problem
Conventional inductor components have a design where the pad portions of the coil are wider than the wiring portions, leading to a smaller inner diameter and reduced efficiency of inductance acquisition.
Innovation Solution
The inductor component features a spiral coil structure with wide coil wirings at both ends and penetration wirings that extend parallel to the axis, allowing for increased inner diameter and improved inductance efficiency, while utilizing dead spaces for reduced electrical resistance and enhanced Q value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pad portion width is made wider than the wiring portion width to improve connectivity, then the connectivity between pad portion and conductive via is improved, but the inner diameter of the coil becomes small and inductance acquisition efficiency is reduced
Solution Approach 1:
The invention changes the width direction of the coil wirings from the radial direction to the axial direction. By making the maximum width of both-end coil wirings larger than inner coil wirings in the axial direction, the connectivity is improved without reducing the inner diameter, thus resolving the contradiction between connectivity and inductance acquisition efficiency
Solution Approach 2:
The invention applies different width characteristics to different parts of the coil structure. The both-end coil wirings have a larger maximum width in the axial direction compared to inner coil wirings, creating local quality differences that improve connectivity at critical connection points while maintaining overall coil performance
Data Source
AI summary
An inductor component includes an element body having first and second principal surfaces opposite to each other; a coil that is in the element body and is wound in a spiral shape along an axis; and first and second external electrodes that are on the element body and are electrically connected to the coil. The axis of the coil is parallel to the first principal surface. The coil includes first coil wirings which are on the first principal surface side with respect to the axis and arranged along the axis on a plane parallel to the first principal surface, second coil wirings which are on the second principal surface side with respect to the axis and arranged along the axis on a plane parallel to the second principal surface, and first and second penetration wirings which extend from the respective first coil wirings toward the respective second coil wirings.