Integrated Shielding Layer in Coil Component for EMI Reduction
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Solution Overview
Problem
Current coil components face challenges in reducing magnetic flux leakage, achieving smaller size and thickness, and forming an electrode structure on a lower surface while effectively shielding against electromagnetic interference (EMI).
Innovation Solution
A coil component design featuring a body with opposing surfaces, internal and lower insulating layers, external electrodes, and a shielding layer that extends to the body's surface, with a recessed structure to prevent electrical shorts and allow for reduced size and thickness, while effectively reducing magnetic flux leakage and enabling easy electrode formation on the lower surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding can is used to envelop electronic components, then electromagnetic interference shielding is improved, but device size and complexity increase
Solution Approach 1:
The shielding layer is integrated within the coil component structure itself, nesting the shielding function inside the existing component rather than adding an external shielding can. This eliminates the need for separate shielding enclosures while maintaining EMI protection.
Solution Approach 2:
The shielding layer is combined with the insulating layers and coil structure into a single integrated component. The shielding function is merged with the structural elements of the coil component, eliminating the need for separate shielding cans and reducing overall device size.
2Volume of stationary object
If component size is reduced, then device integration is improved, but manufacturing precision requirements increase
Solution Approach 1:
The insulating layers and shielding layer are formed as integral parts of the coil component structure during the manufacturing process, with recesses pre-formed to accommodate electrode connections. This preliminary integration of insulating and shielding structures simplifies subsequent assembly and maintains precision requirements.
3Ease of operation
If electrode structure is formed on lower surface, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The electrodes are positioned on the lower surface of the coil component rather than on the sides or top, utilizing the vertical dimension for electrical connections. This dimensional arrangement simplifies mounting and connection processes while the integration with insulating layers keeps overall complexity manageable.
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 magnetic flux leakage, allows for a smaller and thinner coil component, and facilitates the formation of an electrode structure on the lower surface, enhancing the component's performance and size reduction while maintaining shielding effectiveness.
Implementation Method 1
A shielding layer is disposed on the other surface of the body and the plurality of walls of the body, and has at least a portion extending to the one surface of the body and spaced apart from the first and second external electrodes
Data Source
AI summary
A coil component includes a body having one surface and another surface opposing each other in one direction, a plurality of walls each connecting the one surface to the other surface, and a coil portion disposed therein. A recess extends along at least portions of edges common to the one surface and to walls of the plurality of walls. A lower insulating layer is disposed in the recess and on the one surface. First and second external electrodes penetrate through the lower insulating layer, are spaced apart from each other on the one surface of the body, and are connected to the coil portion. A shielding layer is disposed on the other surface of the body and the plurality of walls of the body, and extends to the one surface of the body to be spaced apart from the first and second external electrodes.