Electromagnetic Shielding Sheet with Perforated Conductive Protrusions
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Solution Overview
Problem
Conventional electromagnetic wave shielding and heat-radiating systems for electronic devices are bulky, complex to manufacture, and costly, with existing solutions failing to efficiently shield electromagnetic waves while also effectively radiating heat, leading to increased product thickness and reduced flexibility.
Innovation Solution
A laminated electromagnetic wave shielding heat-radiation sheet featuring an elastic support layer with perforated portions and a conductive layer, where conductive protrusions are formed by partially cutting the conductive layer to bend through the elastic support layer, allowing for efficient heat and electromagnetic wave transfer between surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional electromagnetic wave shielding systems use elastic thermoplastic resin with conductive fabrics or non-woven fabrics laminated surrounding a core, then electromagnetic wave shielding is achieved, but the system becomes large and too thick
Solution Approach 1:
The patent combines electromagnetic wave shielding function and heat radiation function into a single integrated sheet structure. The conductive layer is directly formed on the elastic support layer, eliminating the need for separate core polymer with conductive fabrics, thereby reducing overall thickness while maintaining shielding effectiveness.
Solution Approach 2:
The patent uses a thin conductive layer formed on the elastic support layer instead of bulky conductive fabrics or non-woven fabrics. This thin film approach maintains electromagnetic wave shielding capability while significantly reducing the thickness of the shielding system.
2Object-affected harmful factors
If conventional electromagnetic wave shielding systems use directly compounded electrically conductive metallic powder into polymer elastomer, then volume conductivity is provided, but the system becomes complicated to manufacture and increases material cost
Solution Approach 1:
The patent segments the shielding function into a separate conductive layer that is laminated on the elastic support layer, rather than mixing conductive powder throughout the bulk polymer elastomer. This layered structure simplifies manufacturing by allowing independent preparation and assembly of components.
Solution Approach 2:
The patent creates a composite structure with an elastic support layer and a conductive layer, where each layer maintains its own properties. This composite approach simplifies manufacturing compared to uniformly dispersing conductive filler throughout the polymer matrix.
3Reliability
If too much metal particles or carbon black particles are present within polymer elastomer to obtain higher conductivity, then electrically conductivity increases, but the metals and carbon black particles are difficult to disperse uniformly and melt visco-elasticity is reduced
Solution Approach 1:
The patent separates the conductive function into a distinct conductive layer, avoiding the need to disperse metal particles or carbon black throughout the polymer elastomer. This eliminates uniformity issues while maintaining high conductivity through the dedicated conductive layer.
4Object-affected harmful factors
If conventional electromagnetic wave shielding systems are used, then electromagnetic wave shielding is achieved, but heat radiation capability is insufficient or requires additional systems
Solution Approach 1:
The patent designs the sheet to perform multiple functions simultaneously: the elastic support layer provides mechanical support and impact absorption, while the conductive layer provides both electromagnetic wave shielding and heat radiation capabilities. This multi-functional design eliminates the need for separate heat radiation systems.
Solution Approach 2:
The patent merges electromagnetic wave shielding function and heat radiation function into a single integrated structure. The conductive layer serves dual purposes of shielding electromagnetic waves and radiating heat, combining what were previously separate system requirements.
5Object-affected harmful factors
If rigid electromagnetic wave shielding systems are used, then shielding effectiveness is achieved, but flexibility and adaptability to non-uniform surfaces is reduced
Solution Approach 1:
The patent uses an elastic support layer that provides flexibility and adaptability to non-uniform surfaces. The conductive layer is formed on this flexible substrate, maintaining shielding effectiveness while allowing the system to conform to various surface geometries.
Solution Approach 2:
The patent employs an elastic support layer that can dynamically adapt its shape to match non-uniform surfaces, providing both mechanical flexibility and maintained shielding performance across varying geometries.
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 sheet effectively shields electromagnetic waves and radiates heat, reducing product thickness, improving flexibility, and enhancing adhesion to non-uniform surfaces, while maintaining mechanical impact absorption properties.
Implementation Method 1
at least one conductive layer 2 is laminated on one surface or both surfaces of the elastic support layer 1... the sheet effectively shields electromagnetic waves
Implementation Method 2
it is possible to transfer electricity and heat from one side surface to the other side surface of the sheet
Data Source
AI summary
Disclosed is an electromagnetic wave shielding heat-radiation sheet allowing electricity and heat to be transferred from one side surface to the other side surface of the sheet, in which conductive protrusions formed by partially cutting a conductive layer laminated on an elastic support layer are bent toward the rear surface of the elastic support layer to pass through the elastic support layer and come in contact with the rear surface of the elastic support layer.