ITO Glass Electromagnetic Shield for Mobile Devices
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Solution Overview
Problem
Conventional electromagnetic shields in mobile communication devices, made of metal materials, are inconvenient to remove and replace for inspecting RF transceivers, and existing materials like ordinary glass are ineffective in blocking electromagnetic waves within the 100 MHz to 1500 MHz frequency range.
Innovation Solution
An electromagnetic shield comprising an organic glass layer and an indium tin oxide (ITO) layer, with a silicon dioxide layer for enhanced adhesive strength, provides effective blocking of electromagnetic waves and allows for transparent properties, eliminating the need for detachment during RF transceiver inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metal materials are used for EM shield, then EM wave blocking effect is improved, but ease of operation for inspecting RF transceiver deteriorates
Solution Approach 1:
The patent uses a composite structure consisting of an organic glass layer and an indium tin oxide (ITO) layer. The organic glass layer provides structural support and transparency, while the ITO layer provides electromagnetic wave blocking capability. This composite material approach maintains the EM shielding effectiveness of metal materials while achieving transparency and improved ease of operation, as the transparent shield does not need to be detached for inspecting the RF transceiver.
2Ease of operation
If ordinary glass is used for shield, then ease of operation is improved, but EM wave blocking effect deteriorates
Solution Approach 1:
The patent combines ordinary glass (organic glass layer) with a functional coating layer (indium tin oxide layer). The ordinary glass maintains ease of operation and structural properties, while the ITO layer adds the necessary EM wave blocking capability that ordinary glass lacks. This composite structure resolves the contradiction by integrating the advantages of both materials.
Solution Approach 2:
The patent changes the physical and chemical parameters of the glass material by plating it with an indium tin oxide layer. This surface modification transforms ordinary glass into a material with enhanced electromagnetic wave blocking properties while maintaining its original structural advantages, transparency, and ease of operation.
3Object-affected harmful factors
If metal EM shield is used, then EM wave blocking effect is improved, but device complexity for removal and replacement increases
Solution Approach 1:
The transparent EM shield uses a composite structure of organic glass and ITO layer that integrates the shielding function directly into the cover glass assembly. This eliminates the need for separate metal shield components that require complex removal and replacement procedures, thereby reducing device complexity while maintaining effective EM wave blocking.
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 ITO glass shield effectively blocks electromagnetic waves within the 100 MHz to 1500 MHz range with 20 dB attenuation, ensuring component protection and user safety while maintaining transparency and ease of maintenance.
Implementation Method 1
The indium tin oxide layer is plated on the organic glass layer for blocking the electromagnetic waves
Implementation Method 2
The indium tin oxide layer is plated on the organic glass layer for blocking the electromagnetic waves
Implementation Method 3
with a silicon dioxide layer for enhanced adhesive strength
Data Source
AI summary
An electromagnetic shield is configured for blocking electromagnetic waves in a mobile communication device. The electromagnetic shield includes an organic glass layer and an indium tin oxide layer. The organic glass layer is configured for providing main body of the electromagnetic shield. The indium tin oxide layer is plated on the organic glass layer for blocking the electromagnetic waves.