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Preparation method of embedded metal grid electromagnetic shielding optical window

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

Active Publication Date: 2017-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method of embedded metal grid electromagnetic shielding optical window
  • Preparation method of embedded metal grid electromagnetic shielding optical window

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specific Embodiment 1

[0032] 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:

[0033] Step a, making titanium dioxide sol;

[0034] 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;

[0035] 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

[0037] 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.

[0038] 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.

[0039] In the above embodiment, the specific configuration method of step a is as follows figure 2 shown. for:...

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Abstract

A method for preparing an embedded metal grid electromagnetic shielding optical window belongs to the technical field of optical windows; in the method, a titanium dioxide sol is first prepared; then, the titanium dioxide sol is coated on a substrate by a spin coating method, and the titanium dioxide sol is naturally dried to form cracks template; finally, continuously scrape and coat nano-silver paste mixed with hydrophobic solvent on the surface of the cracked template until the nano-silver paste is filled with cracks, and heat and bake in the temperature range of 50-80°C; the embedded metal grid electromagnetic shielding optics of the present invention The window preparation method can achieve the same effect as the prior art, while omitting the necessary step of removing the crack template in the prior art, saving production time and production cost; at the same time, the dried nano-silver paste is embedded in the crack template, Effectively avoid the problem of damage to the electromagnetic shielding performance of the optical window caused by the damage of the nano-silver paste. In addition, considering that the change of the thickness of the titanium dioxide sol will affect the light transmission performance of the optical window, a reasonable thickness of the titanium dioxide sol is given.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
Inventor 金鹏韩余
Owner HARBIN INST OF TECH