Shielded Coil Component Layout for EMI Noise Reduction
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Solution Overview
Problem
The increasing demand for smaller, high-performance electronic devices has led to a need for coil components that effectively reduce electromagnetic interference (EMI) without significantly reducing the volume of magnetic material.
Innovation Solution
A coil component design featuring a support substrate with a through-hole, a core, a coil portion, and a shielding pattern that extends between the internal wall of the substrate and the core, along with external electrodes, which helps to mitigate EMI by strategically positioning the shielding pattern to minimize the volume of magnetic material used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding pattern is added to remove EMI noise, then noise removal performance is improved, but the volume of magnetic material is significantly reduced
Solution Approach 1:
The shielding pattern is nested within the through-hole of the support substrate, utilizing the existing hollow space rather than adding external structures. This allows the shielding function to be integrated into the core structure without significantly increasing overall volume or reducing magnetic material volume.
Solution Approach 2:
The shielding pattern is positioned in the radial dimension within the through-hole, creating a multi-dimensional shielding structure. This radial arrangement provides effective EMI shielding while minimizing the axial dimension occupied, thereby preserving magnetic material volume along the length of the component.
2Volume of moving object
If the size of coil component is reduced for high-performance devices, then device integration is improved, but noise removal capability deteriorates
Solution Approach 1:
The shielding pattern is locally concentrated within the through-hole region where EMI noise is most generated and transmitted. This localized shielding approach provides effective noise removal at the critical interface between the core and external environment, maintaining small overall component size while addressing noise at its source.
Solution Approach 2:
The shielding pattern acts as an intermediary structure within the through-hole, mediating between the magnetic core and the external environment. This intermediate shielding layer effectively blocks EMI noise transmission while allowing the component to maintain a compact size suitable for high-performance devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively removes noise while preventing a significant reduction in the volume of magnetic material, maintaining the component's performance and size efficiency.
Implementation Method 1
a shielding pattern disposed between an internal wall of the support substrate, by which the through-hole is defined, and the core
Data Source
AI summary
A coil component includes a support substrate including a through-hole disposed therein; a body including the support substrate embedded therein, and having a core disposed in the through-hole of the support substrate; a coil portion disposed on the support substrate, embedded in the body, and having a plurality of turns with reference to the core as an axis on the support substrate; and a shielding pattern disposed between an internal wall of the support substrate, by which the through-hole is defined, and the core.