Coil Component Shielding Structure for EMI Noise Discharge
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Solution Overview
Problem
As electronic devices become more compact and incorporate a larger number of components, there is an increasing demand for effective noise removal, particularly electromagnetic interference (EMI), which existing coil components struggle to address efficiently.
Innovation Solution
A coil component design featuring a body with a support substrate, a coil unit, a noise removal unit, and external electrodes, where the noise removal unit includes a wall portion surrounding the outermost turn of the coil unit and a cover portion on the coil unit, with capacitive coupling to discharge noise to a ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional coil component design is used, then the device structure is simple, but electromagnetic interference noise cannot be effectively removed
Solution Approach 1:
The noise removal unit is segmented into distinct functional portions: a wall portion surrounding the coil unit and a cover portion covering the coil unit. This segmentation allows each portion to independently contribute to noise removal while maintaining a manageable structural complexity. The wall portion and cover portion can be separately formed and then integrated, simplifying the manufacturing process despite the enhanced noise removal functionality.
Solution Approach 2:
The noise removal unit acts as an intermediary structure between the coil unit and the external environment. It includes a wall portion and a cover portion that together form a shielding structure, preventing electromagnetic interference from propagating while allowing the coil unit to function normally. This intermediary structure resolves the contradiction by introducing a dedicated noise removal mechanism without requiring complete redesign of the entire coil component.
2Object-affected harmful factors
If the noise removal unit is placed close to the coil unit, then noise removal efficiency is improved, but capacitive coupling is reduced
Solution Approach 1:
The noise removal unit exhibits local quality variations through its different portions: the wall portion is positioned adjacent to the coil unit for direct noise removal, while the cover portion extends to provide additional shielding. This spatial differentiation allows the structure to optimize both noise removal efficiency (through close proximity of the wall portion) and capacitive coupling (through the extended cover portion that maintains appropriate electrical characteristics).
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
The design effectively reduces electromagnetic interference by enhancing capacitive coupling and discharge efficiency, allowing for quicker and more extensive noise removal.
Implementation Method 1
the noise removal unit includes a wall portion disposed outside of an outermost side turn of the coil unit at the support substrate and surrounding the outermost side turn of the coil unit and a cover portion disposed on the coil unit
Data Source
AI summary
A coil component includes a body, a support substrate disposed within the body, a coil unit disposed on the support substrate, a noise removal unit disposed to be spaced apart from the coil unit within the body and having an end exposed to one side surface of the body, first and second external electrodes disposed to be spaced apart from each other at the body and connected to both ends of the coil unit, and a third external electrode disposed to be spaced apart from each of the first and second external electrodes within the body and connected to the noise removal unit, wherein the noise removal unit includes a wall portion disposed outside of an outermost side turn of the coil unit at the support substrate and surrounding the outermost side turn of the coil unit and a cover portion disposed on the coil unit.