Capacitive Noise Removal Structure in Miniaturized Coil Components
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Solution Overview
Problem
High-frequency noise poses a challenge in miniaturized electronic devices due to increased operating frequencies, which existing coil components are unable to effectively mitigate.
Innovation Solution
A coil component design featuring a body with a coil portion, a noise removal portion, an insulating layer, and external electrodes, where the noise removal portion is capacitively-coupled with the insulating layer and external electrodes to efficiently discharge high-frequency noise, minimizing component thickness and noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electronic components are miniaturized and operating frequency is increased, then device performance is improved, but high-frequency noise increases
Solution Approach 1:
A noise removal portion is introduced as an intermediary element between the coil portion and external environment. This noise removal portion, when viewed from a direction perpendicular to the winding direction of the coil portion, has an area that is 10% to (90-W%) of a total area W%, where W is the width of the coil portion in the winding direction. This specific area ratio ensures effective noise suppression while maintaining device performance.
Solution Approach 2:
The noise removal portion is strategically positioned and sized to provide localized noise suppression exactly where needed. By configuring the noise removal portion to have a specific area ratio (10% to (90-W%) of total area W%) when viewed from the direction perpendicular to the winding direction, the design achieves targeted noise removal without affecting overall device performance.
2Object-affected harmful factors
If a noise removal structure is added to the coil component, then noise removal capability is improved, but device complexity increases
Solution Approach 1:
The noise removal portion is merged with the coil component body as an integrated structure. When viewed from a direction perpendicular to the winding direction of the coil portion, the noise removal portion occupies a specific area ratio (10% to (90-W%) of total area W%), and this integrated design eliminates the need for separate noise removal components, thereby reducing overall device complexity while maintaining effective noise suppression.
3Object-affected harmful factors
If the noise removal portion area is increased, then noise removal efficiency is improved, but component area is consumed
Solution Approach 1:
The design optimizes the area parameter of the noise removal portion by defining it as a specific ratio (10% to (90-W%) of total area W%) when viewed from the direction perpendicular to the winding direction. This parameter-based approach ensures that the noise removal portion is large enough to be effective while consuming minimal component area, achieving optimal noise removal efficiency within constrained space.
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 high-frequency noise transmission, improving signal integrity and preventing unnecessary noise propagation, as demonstrated by comparative signal transmission characteristic results.
Implementation Method 1
the noise removal portion is capacitively-coupled with the insulating layer and external electrodes to efficiently discharge high-frequency noise
Data Source
AI summary
A coil component includes a body; a coil portion disposed inside the body; a noise removal portion disposed to contact a surface of the body; an insulating layer disposed inside the noise removal portion; first and second external electrodes each connected to the coil portion and disposed on the insulating layer to overlap the noise removal portion; and a third external electrode disposed to be spaced apart from the first and second external electrodes and contacting the noise removal portion.