Coil Component With Capacitive Noise Removing Portion
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Solution Overview
Problem
There is an increasing demand for coil components that can effectively remove noise, particularly electromagnetic interference (EMI), in electronic devices with high performance and reduced size, where existing coil components fail to efficiently manage noise at higher frequencies.
Innovation Solution
A coil component design featuring a body with a support substrate, a coil portion, a noise removing portion with an open loop configuration, and insulating layers, where the noise removing portion is capacitively-coupled to the coil portion to effectively emit noise and reduce magnetic material usage, thereby enhancing noise removal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional coil component design is used, then the structure is simple, but noise removal capability is insufficient at high frequencies
Solution Approach 1:
The coil component is segmented into functionally distinct parts: a coil portion for signal transmission and a noise removing portion for EMI suppression. This segmentation allows each part to be optimized for its specific function, enabling effective noise removal while maintaining a relatively simple overall structure.
Solution Approach 2:
An insulating layer is introduced as an intermediary between the coil portion and the noise removing portion. This intermediary enables capacitive coupling that allows the noise removing portion to effectively suppress high-frequency EMI while maintaining electrical isolation, thus improving noise removal capability without requiring direct contact or complex wiring.
2Object-affected harmful factors
If magnetic material is increased to improve noise removal, then noise removal efficiency improves, but component size and material usage increase
Solution Approach 1:
The patent replaces traditional magnetic shielding mechanisms with an electric field-based noise removing portion that uses capacitive coupling. This substitution eliminates the need for large quantities of magnetic materials while achieving effective EMI suppression through the insulating layer and conductive structure configuration.
Solution Approach 2:
The noise removing portion uses changes in electrical parameters (capacitive coupling through the insulating layer) rather than relying on magnetic material quantity. By adjusting the insulation thickness and conductive pattern geometry, effective noise removal is achieved without increasing magnetic material usage.
3Volume of moving object
If the coil component size is reduced for compact devices, then device compactness improves, but noise removal capability deteriorates
Solution Approach 1:
The noise removing portion utilizes the vertical dimension and surface area of the support substrate to create an effective EMI suppression structure. By patterning conductive elements on the substrate surface and using capacitive coupling through the insulating layer, effective noise removal is achieved in a compact footprint without requiring additional volume.
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 proposed coil component design effectively transmits low-frequency signals while preventing unnecessary high-frequency noise, maintaining component properties and reducing magnetic material usage, thus addressing the challenge of noise removal in compact electronic devices.
Implementation Method 1
the noise removing portion is capacitively-coupled to the coil portion
Data Source
AI summary
A coil component includes a body, a support substrate buried in the body, a coil portion disposed on at least one surface of the support substrate and having both ends exposed to a surface of the body, a noise removing portion disposed on the at least one surface of the support substrate, spaced apart from the coil portion, and forming an open loop such that one end of the noise removing portion is exposed to a surface of the body, an insulating layer disposed between the coil portion and the noise removing portion, first and second external electrodes disposed on a surface of the body and connected to both ends of the coil portion, respectively, and a third external electrode disposed on a surface of the body and connected to the one end of the noise removing portion.