Helical Inductor Coil Layout for Lower Magnetic Flux Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional inductor components face issues with magnetic flux interference due to the protrusion of pad parts towards the inside of the coil, leading to reduced L and Q values, especially in smaller designs where via wiring reliability is crucial.
Innovation Solution
The inductor component design includes a helical coil structure with pad parts that protrude 1.4 times or less of the width dimension of adjacent wiring parts, ensuring minimal interference with magnetic flux and maintaining via wiring connection reliability through longer via wiring lengths and strategic placement of pad parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pad part protrudes toward the inside of the coil to ensure connection reliability, then the via wiring connection reliability is improved, but the magnetic flux interference increases and L and Q values decrease
Solution Approach 1:
The patent applies parameter changes by precisely controlling the protrusion amount of the pad part to be 1.4 times or less of the wiring part width. This quantitative parameter optimization resolves the contradiction by finding the optimal balance point where connection reliability is maintained while magnetic flux interference is minimized, thereby preserving L and Q values.
2Volume of moving object
If the inductor component size is reduced, then the compactness is improved, but the pad part protrusion becomes larger relative to the wiring width, increasing magnetic flux interference
Solution Approach 1:
The patent maintains the protrusion amount parameter relationship (1.4 times or less of wiring width) even as the overall component size is reduced. This scalable parameter control allows the inductor to achieve compactness while preventing the relative protrusion increase that would otherwise cause greater magnetic flux interference in smaller designs.
3Area of stationary object
If the pad part is projected toward the inside of the coil, then the via wiring connection area is improved, but the dimensional margin for manufacturing the element body outside the coil becomes smaller
Solution Approach 1:
The patent optimizes the pad part projection parameter to protrude by 1.4 times or less of the wiring part width toward the inside of the coil. This controlled parameter change ensures sufficient connection area for via wiring reliability while maintaining adequate dimensional margins for element body manufacturing outside the coil region.
Data Source
AI summary
An inductor component comprising an element body; a coil disposed in the element body; and a first external electrode and a second external electrode disposed on the element body and electrically connected to the coil. The coil has a helical structure in which the coil is wound while proceeding along an axis such that the axis is parallel to a bottom surface of the element body and intersects with first and second side surfaces of the element body. The coil includes coil wirings laminated along the axis and wound along a plane, and a via wiring connecting the coil wirings. The first coil wiring is on a central side in the axial direction of the coil relative to the second coil wiring, and a first pad part of the first coil wiring is adjacent to a second wiring part of the second coil wiring in the axial direction.