LC Composite Component with Magnetic Layer for Shielding
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Solution Overview
Problem
Existing LC composite components for wireless communication devices face challenges in reducing size, thickness, and cost while maintaining high electromagnetic shielding performance and minimizing inductor losses, which often lead to degraded characteristics in high frequency bands due to eddy current losses.
Innovation Solution
The LC composite component design includes one or more inductors, capacitors, a magnetic layer, and a substrate where the magnetic layer is positioned on one side of the inductors, and the substrate is thicker than the magnetic layer, with a complex permeability that is smaller than the magnetic layer's, allowing for reduced magnetic material usage and enhanced shielding without the need for large metal layers on opposite sides of the inductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If two metal layers with large surface area are provided on opposite sides of the inductor to enhance electromagnetic shielding performance, then electromagnetic shielding performance is improved, but the thickness of the component increases and the distance between the inductor and metal layers increases, leading to increased eddy current losses
Solution Approach 1:
The invention extracts the electromagnetic shielding function from the traditional approach of using two large metal layers on opposite sides of the inductor. Instead, it uses a magnetic substrate that provides shielding primarily on one side of the inductor, eliminating the need for the second metal layer and reducing overall component thickness while maintaining shielding effectiveness.
Solution Approach 2:
The magnetic substrate is positioned specifically on one side of the inductor where it is most needed for shielding, rather than symmetrically placing metal layers on both sides. This localized approach reduces the number of components and overall thickness while achieving the required electromagnetic shielding performance.
2Length of stationary object
If the thickness of the component is reduced to achieve downsizing, then the thickness and size are reduced, but the distance between the inductor and metal layers decreases, leading to increased eddy current losses and degraded characteristics in high frequency bands
Solution Approach 1:
The magnetic substrate acts as an intermediary between the inductor and the external environment, providing electromagnetic shielding without requiring close proximity to large metal layers. This intermediary structure enables thickness reduction while preventing eddy current losses by eliminating the need for traditional metal shielding layers that would be positioned close to the inductor.
3Volume of moving object
If magnetic substrate is used to reduce the size of the inductor, then the size of the inductor is reduced, but the cost increases due to the use of magnetic materials
Solution Approach 1:
The magnetic substrate serves multiple functions simultaneously: it provides electromagnetic shielding and enables inductor downsizing. By combining these functions into a single component rather than using separate metal shielding layers and full-sized inductors, the overall cost is reduced despite the use of magnetic materials.
4Device complexity
If all pattern electrodes are placed on one plane to simplify the structure, then the structure is simplified, but further size reduction becomes difficult
Solution Approach 1:
The invention transitions from a two-dimensional planar arrangement of all electrodes to a three-dimensional stacked configuration. Pattern electrodes and ground electrodes are arranged on different planes and levels, utilizing the vertical dimension to achieve further size reduction while maintaining structural manageability.
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 configuration enables downsizing of inductors, reduces conductor losses, and enhances electromagnetic shielding, making the LC composite component less susceptible to characteristic degradation, thus achieving reductions in size, thickness, and cost while maintaining high performance.
Implementation Method 1
a magnetic layer having magnetism
Implementation Method 2
The substrate has a complex permeability having a real part and an imaginary part that are respectively smaller than the real part and the imaginary part of the complex permeability of the magnetic layer
Data Source
AI summary
An LC composite component includes one or more inductors, one or more capacitors, a magnetic layer, and a substrate. The substrate has a first surface, and a second surface opposite to the first surface. The magnetic layer is disposed to face the first surface of the substrate. The one or more inductors are disposed between the first surface of the substrate and the magnetic layer. The substrate has a thickness greater than that of the magnetic layer in a direction perpendicular to the first surface of the substrate. The substrate has a complex permeability having a real part and an imaginary part that are respectively smaller than the real part and the imaginary part of the complex permeability of the magnetic layer.