Electromagnetic Shielding Film with Multi-Layer Conductive Grids
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Solution Overview
Problem
Existing electromagnetic shielding films have a narrow shielding band and are easily penetrated by interference signals due to continuous updates in electromagnetic interference technology, failing to meet the increasing demands for effective shielding in advanced devices.
Innovation Solution
An electromagnetic shielding film with multiple conductive layers, each containing a conductive grid with different materials and grid shapes, stacked on a supporting layer, where the conductive materials and grid configurations are designed to shield different electromagnetic bands, broadening the shielding range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single conductive material is used in the shielding film, then the structure is simple and manufacturing is easier, but the shielding band is narrow and cannot effectively shield multiple electromagnetic frequency bands
Solution Approach 1:
The shielding film is divided into multiple conductive layers (first conductive layer, second conductive layer, etc.), each containing different conductive materials. This segmentation allows each layer to target specific electromagnetic frequency bands, thereby broadening the overall shielding band while maintaining manageable structural complexity through modular design
Solution Approach 2:
The patent employs composite materials by combining multiple conductive materials (such as metal materials, conductive polymer materials, or conductive oxide materials) within different conductive layers. This composite approach enables the shielding film to effectively shield across multiple electromagnetic frequency bands simultaneously, resolving the contradiction between shielding versatility and structural simplicity
2Reliability
If conventional shielding materials are used, then the manufacturing process is simple, but the shielding film is easily penetrated by interference signals due to narrow shielding band
Solution Approach 1:
By segmenting the shielding function across multiple conductive layers with different materials, each layer can be optimized for specific frequency ranges. This segmentation enhances overall shielding reliability against diverse interference signals while allowing each individual layer to be manufactured using established techniques, balancing effectiveness with manufacturability
Solution Approach 2:
The patent changes material parameters by selecting different conductive materials with varying electrical properties, conductivity, and electromagnetic characteristics for different conductive layers. This parameter variation enables effective shielding across multiple frequency bands, improving reliability while the modular layer structure maintains ease of manufacture through standardized production processes
3Adaptability or versatility
If multiple conductive layers with different materials are stacked, then the shielding band is broadened, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process is segmented into discrete steps for forming each conductive layer independently. Each layer can be prepared, patterned, and assembled separately before being stacked together, which broadens the shielding band through material diversity while keeping the manufacturing process manageable through modular fabrication and assembly
Solution Approach 2:
The patent employs universal manufacturing techniques that can be applied across different conductive layers, such as using the same substrate material (transparent polymer film) and similar deposition or patterning methods for each layer. This multi-functionality approach broadens shielding capability through material variation while maintaining ease of manufacture through process standardization
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 film effectively broadens its shielding band by combining the shielding capabilities of different conductive materials, enhancing its ability to meet market demands for advanced devices by providing comprehensive electromagnetic protection.
Implementation Method 1
N conductive layers, stacked on at least one of the first side surface and the second side surface, where N≥2, each of the N conductive layers includes a conductive grid, the conductive grid includes a conductive material filled in a grid-shaped trench, and at least two of the N conductive layers have conductive materials for shielding different bands, respectively
Data Source
AI summary
Disclosed is an electromagnetic shielding film, including a supporting layer and N conductive layers. The supporting layer has a first side surface and a second side surface arranged oppositely, the N conductive layers are stacked on at least one of the first side surface and the second side surface, and N≥2. Each of the N conductive layers includes a conductive grid, the conductive grid includes a conductive material filled in a grid-shaped trench, and at least two of the N conductive layers have conductive materials for shielding different bands, respectively. Different conductive layers have different conductive materials, and therefore can shield different bands, thereby broadening a shielding band of the electromagnetic shielding film, which can better meeting market demands.