Transparent electromagnetic shielding film

An electromagnetic shielding film, transparent technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of high processing costs, polluting the environment, and long time consumption, and achieve excellent optical performance, high light transmittance, and no pinholes Effect

Pending Publication Date: 2021-07-02
JIANGSU RIJIU OPTOELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, in response to EMI, there are evaporation coatings, chemical coatings, conductive paints, etc. to achieve shielding functions. However, these processes are time-consuming, thick materials, high processing costs, and pollute the environment, as shown in the patent announcement number CN204206720 A nanoscale metal electromagnetic shielding film, comprising a three-layer structure of a carrier layer

Method used

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Examples

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Embodiment 1

[0023] In Example 1, the lower protective layer 2 is made of silicon dioxide, the metal functional layer 3 is made of silver alloy, the upper protective layer 4 is made of silicon dioxide, and the capping layer 5 is made of titanium oxide. After testing in this embodiment, the light transmittance is as high as 80%, adhesion 5B, salt spray test (5% Nacl) can only resist corrosion for 10H, die cutting test found that the edge is whitish.

Embodiment 2

[0024] Example 2, the lower protective layer 2 is made of silicon dioxide, the metal functional layer 3 is made of silver alloy, the upper protective layer 4 is made of aluminum oxide-doped zinc oxide, wherein the content of zinc oxide is 50%-99%, and the sealing layer 5 is made of Niobium pentoxide, this embodiment is tested, the light transmittance is as high as 73%, the adhesion is 5B, the salt spray test (5% Nacl) can resist corrosion for 35H, and the die-cutting test is up to standard.

Embodiment 3

[0025] Example 3, the lower protective layer 2 is aluminum oxide-doped zinc oxide, the metal functional layer 3 is silver alloy, the upper protective layer 4 is nickel-chromium alloy, and the capping layer 5 is silicon dioxide. After testing in this embodiment, the oxidation The zinc content is 50%-99%, the light transmittance is as high as 42%, the adhesion is 5B, the salt spray test (5% Nacl) can resist corrosion for 100H, and the die-cutting test shows that the edge is whitish.

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Abstract

A transparent electromagnetic shielding film comprises a base material layer, a lower protective layer, a metal functional layer, an upper protective layer for preventing oxidation and a sealing cover layer for retaining water and isolating air, wherein the lower protective layer is titanium oxide, zinc oxide, nickel-chromium alloy, silicon dioxide, niobium pentoxide, aluminum oxide, magnesium oxide-doped zinc oxide or an aluminum oxide-doped zinc oxide layer, the metal functional layer is a copper, silver, titanium, gold, aluminum, rhenium, palladium, ruthenium, rhodium, platinum, iridium or osmium layer or an alloy layer of the above metals, and the upper protective layer is a silicon dioxide, zinc oxide, nickel, chromium, nickel-chromium alloy, aluminum oxide-doped zinc oxide or silicon oxide-doped aluminum layer. Through film layer structure matching, the shielding film has good salt mist resistance and environmental measurement resistance, also has excellent optical performance, high light transmittance and a better laser die cutting effect, is convenient for laser large-scale cutting and processing, and can be used for manufacturing fine parts; the shielding film has a nano-level size and is thinner and lighter; the film layer is compact and has no pinhole points; the sheet resistance uniformity is good; the adhesive force of the film layer is good; and good gluing is realized.

Description

technical field [0001] The invention relates to a transparent electromagnetic shielding film. Background technique [0002] In recent years, with the continuous development of communication products (mobile phones), computers (notebooks), portable electronic products, consumer electronics, network hardware (servers, etc.), medical instruments, household electronic products, and aerospace and defense electronic equipment, among them More and more attention has been paid to the EMI problem. [0003] In the prior art, in response to EMI, there are evaporation coatings, chemical coatings, conductive paints, etc. to achieve shielding functions. However, these processes are time-consuming, thick materials, high processing costs, and pollute the environment, as shown in the patent announcement number CN204206720 A nanoscale metal electromagnetic shielding film, comprising a three-layer structure of a carrier layer, a first shielding layer and an insulating layer, the first shieldi...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 胡业新于佩强刘世琴刘荣欢
Owner JIANGSU RIJIU OPTOELECTRONICS LTD
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