Laminated EMI Shielding Material for 3D Forming and Magnetic Wave Attenuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electromagnetic wave shielding materials face challenges in achieving high shielding ability, particularly against magnetic field waves, and maintaining excellent forming workability, as they often struggle to balance reflection and attenuation effectively and are prone to defects during three-dimensional forming.
Innovation Solution
The development of an electromagnetic wave shielding material comprising one or more magnetic layers sandwiched between two metal layers, which are further sandwiched between two resin layers, optimizing the thickness ratios and properties to enhance reflection and attenuation, while the resin layers help in stress relaxation during forming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electromagnetic wave shielding materials are used to achieve high shielding ability, then the shielding performance is improved, but the forming workability deteriorates and defects occur during three-dimensional forming
Solution Approach 1:
The shielding material is divided into multiple functional layers: magnetic layers (for shielding performance), metal layers (for structural support and additional shielding), and resin layers (for flexibility and forming workability). This segmentation allows each layer to contribute its specific properties, resolving the contradiction between high shielding ability and good forming workability.
Solution Approach 2:
The invention uses a composite structure combining magnetic materials, metal materials, and resin materials in a laminated configuration. This composite approach integrates the high permeability of magnetic materials for magnetic field shielding with the ductility and formability of resin materials, enabling both high shielding performance and excellent three-dimensional forming workability without breakage or defects.
2Reliability
If magnetic layer thickness is increased to improve magnetic field wave shielding, then shielding ability is improved, but forming workability deteriorates due to increased brittleness
Solution Approach 1:
The magnetic layers are positioned specifically between metal layers and resin layers, with optimized thickness (10 μm or more but not excessive). The resin layers provide local flexibility and stress absorption at critical positions, while metal layers provide structural reinforcement. This local quality distribution allows the magnetic layers to achieve high shielding performance without requiring excessive thickness that would cause brittleness.
Solution Approach 2:
The resin layers are positioned to sandwich the magnetic layers beforehand, providing cushioning and stress relief during the forming process. This prior cushioning prevents the magnetic layers from breaking during three-dimensional forming, even when they have sufficient thickness for high magnetic field shielding performance.
3Reliability
If multiple layers are added to improve shielding performance, then shielding ability is improved, but device complexity increases
Solution Approach 1:
Each layer type serves multiple functions: metal layers provide both structural support and electromagnetic shielding, resin layers provide both flexibility/forming workability and protection for magnetic layers, and magnetic layers provide both magnetic field shielding and contribute to overall structural integrity. This multi-functionality reduces the need for additional specialized layers, maintaining relatively simple device complexity while achieving high shielding performance.
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 achieves a high shielding ability against electromagnetic waves, including magnetic field waves, while ensuring excellent forming workability by reducing the likelihood of breakage and defects during three-dimensional shaping.
Implementation Method 1
an electromagnetic wave shielding material including one or more magnetic layers, two or more metal layers, and two or more resin layers, in which each of the included one or more layers of the magnetic layers is a magnetic layer sandwiched between two metal layers, where the magnetic layer is also sandwiched between two resin layers
Implementation Method 2
An electromagnetic wave shielding material (hereinafter, also described as a 'shielding material') is capable of exhibiting performance of shielding electromagnetic waves (shielding ability) by reflecting electromagnetic waves incident on the shielding material by the shielding material and/or by attenuating the electromagnetic waves in the inside the shielding material
Data Source
AI summary
There is provided an electromagnetic wave shielding material including one or more magnetic layers, two or more metal layers, and two or more resin layers, in which each of the included one or more layers of the magnetic layers is a magnetic layer sandwiched between two metal layers, where the magnetic layer is also sandwiched between two resin layers.