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A conductive foam suitable for electromagnetic shielding

A conductive foam, electromagnetic shielding technology, applied in the direction of magnetic field/electric field shielding, electrical components, etc., can solve the problems of easy loosening, affecting shielding effectiveness, gaps, etc., and achieve the effect of stable conductivity and electromagnetic shielding performance.

Active Publication Date: 2020-04-21
XIAMEN BEACONING PRECISION IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductive adhesive between the metal foil layer of the existing conductive foam and the foam is greatly affected by the temperature. In the environment of poor heat dissipation at high temperature, the bonding viscosity is not enough, and it is easy to loosen and generate gaps, which affects its overall performance. Shielding effectiveness

Method used

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  • A conductive foam suitable for electromagnetic shielding

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Embodiment Construction

[0019] Please refer to figure 1 , the embodiment of the present invention discloses a conductive foam suitable for electromagnetic shielding, which sequentially includes: an outer protective layer 1, a foam layer 2, a first adhesive layer 3, a metal foil layer 4, and a second adhesive layer 5 , the above layers are combined to form the conductive foam.

[0020] A nickel-titanium alloy thin film 41 is formed on the upper and lower surfaces of the metal foil layer 4. Specifically, the nickel-titanium alloy thin film 41 is formed on the upper and lower surfaces of the metal foil layer by physical vapor deposition. The material includes metal nickel, metal titanium and metal copper, and the metal foil layer is aluminum foil.

[0021] The foam layer 2 has leakage holes, the leakage holes are filled with carbon nanotubes 21, and the carbon nanotubes are porous sponge-like carbon nanotube block materials. After the porous spongy carbon nanotube block material is cut, it has an uppe...

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Abstract

The invention discloses conductive foam suitable for electromagnetic shielding. The conductive foam sequentially comprises an outer protection layer, a foam layer, a first pasting layer, a metal foillayer and a second pasting layer, wherein the layers are combined to form the conductive foam, a nickel-titanium alloy thin film is formed on each of an upper surface and a lower surface of the metalfoil layer, leakage holes are formed in the foam layer and are filled with carbon nanotubes, the carbon nanotubes are porous spongy carbon nanotube block-shaped materials, first surfaces of the nickel-titanium alloy thin films are connected with the foam layer and the carbon nanotubes in the foam layer by the first pasting layer, and second surfaces of the nickel-titanium alloy thin films are connected with the second pasting layer. In the conductive foam provided by the invention, relatively excellent integral shielding performance and conductive performance can be provided for electronic equipment in a closed and narrow space with poor cooling performance.

Description

technical field [0001] The invention relates to the technical field of conductive foam, in particular to a conductive foam suitable for electromagnetic shielding. Background technique [0002] Conductive foam usually combines metal foil and foam with conductive glue, and undergoes a series of treatments to make it have good surface conductivity and compressibility, making it suitable for electromagnetic applications where the space is small and the closing pressure is limited. Shielding, widely used in electronic chassis, cabinets, indoor chassis, industrial equipment, notebook computers, mobile communication equipment, etc. The electromagnetic shielding is to isolate the electric field, magnetic field and electromagnetic wave between two spatial regions, usually by applying a shield such as a metal mask to the two spatial regions, and using the shield to separate components, circuits, and combinations. It surrounds the interference sources of components, cables or the whol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 徐宏刘思强
Owner XIAMEN BEACONING PRECISION IND CO LTD
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