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Embedded metal-mesh electromagnetic-shielding optical window preparation method

A metal grid and electromagnetic shielding technology, applied in the field of optical windows, can solve the problems of waste of production time and production cost, lack of protection, easy damage, etc., and achieve the effect of saving production time, saving production cost, and small crack width

Active Publication Date: 2015-08-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the conductive metal is deposited by magnetron sputtering, the conductive metal will cover the surface of the crack template and affect the light transmission performance of the optical window; in order to solve this problem, the crack template must be removed, which will bring the following two problems :
[0007] First, the step of removing the crack template is added, which wastes production time and production cost;
[0008] Second, after the crack template is removed, the dried nano-silver paste will be exposed on the substrate, lacking protection, and easily damaged, resulting in damage to the electromagnetic shielding performance of the optical window

Method used

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  • Embedded metal-mesh electromagnetic-shielding optical window preparation method
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specific Embodiment 1

[0031] The preparation method of the embedded metal grid electromagnetic shielding optical window in this embodiment, the flow chart is as follows figure 1 shown. The method includes the following steps:

[0032] Step a, making titanium dioxide sol;

[0033] Step b, coating the titanium dioxide sol with a thickness of 2-5 μm on the substrate by spin coating, and allowing the titanium dioxide sol to dry naturally to form a crack template;

[0034] Step c: continuously scrape and coat nano-silver paste mixed with a hydrophobic solvent on the surface of the cracked template until the nano-silver paste fills the cracks, and heat and bake at a temperature range of 50-80°C.

specific Embodiment 2

[0035] The preparation method of the embedded metal grid electromagnetic shielding optical window of this embodiment, on the basis of the specific embodiment 1, further includes step d, polishing the surface of the cracked template.

[0036] The technical problem solved by step d is: although the optical window has obtained relatively ideal optical performance in the specific embodiment one, it is impossible to ensure that the nano-silver paste does not cover completely due to the scraping coating of the nano-silver paste mixed with a hydrophobic solvent. to the surface of the slit template, so Embodiment 1 still has room for further improvement of the optical performance. Polishing the cracked template can remove the nano-silver paste that may cover the surface of the cracked template, and further improve the light transmission performance of the optical window.

[0037] In the above embodiment, the specific configuration method of step a is as follows figure 2 shown. for:...

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Abstract

The invention discloses an embedded metal-mesh electromagnetic-shielding optical window preparation method, and belongs to the technical field of optical windows. The method comprises the steps: manufacturing titanium oxide sol firstly; employing a spin-coating method to coating the titanium oxide sol on a substrate, enabling the titanium oxide sol to be dried naturally, and forming a crack template; carrying out the continuous scrape coating of nanometer silver slurry doped with hydrophobic solvent on the surface of the crack template till cracks are filled with the nanometer silver slurry finally, and carrying out heating and braking in the temperature range from 50 DEG C to 80 DEG C. The method can achieve the same effects as the prior art, saves a step of removing the crack template in the prior art, and saves the manufacturing time and cost. Meanwhile, the dried nanometer silver slurry is embedded in the crack template, thereby effectively preventing the damage of the nanometer silver slurry from causing the damage to the electromagnetic shielding performance of an optical window. In addition, the method also gives consideration to a problem that the change of the thickness of the titanium oxide sol will affect the light transmittance performance of the optical window, and gives a reasonable thickness of the titanium oxide sol.

Description

technical field [0001] The invention relates to a preparation method of an embedded metal grid electromagnetic shielding optical window, which belongs to the technical field of optical windows. Background technique [0002] Optical windows are widely used in telemetry and remote sensing, medical diagnosis, secure communication, aerospace equipment and other fields. Traditional optical windows are pure electromagnetic wave transmission windows. However, the continuous growth of electrical equipment will not only greatly increase the intensity of electromagnetic waves, but also broaden the wave band of electromagnetic waves, resulting in the deterioration of the space electromagnetic environment. Because traditional optical windows are transparent to electromagnetic waves, the deterioration of the electromagnetic environment May adversely affect electromagnetically sensitive equipment. In order to reduce electromagnetic interference, an electromagnetic shielding function nee...

Claims

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Application Information

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IPC IPC(8): H05K9/00
Inventor 金鹏韩余
Owner HARBIN INST OF TECH