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Viewing glass for radio frequency electromagnetic screen and method for preparing same

A technology of window glass and electromagnetic waves, applied in the direction of magnetic/electric field shielding, shielding, electrical components, etc., to achieve good permeability, high transmittance, and effective shielding effects

Inactive Publication Date: 2008-10-22
杭州百高实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But usually relatively speaking, the μ of good conductors such as metals r / σ r Higher values ​​of μ for non-metallic dielectrics r ·σ r The value is low, and none of the existing electromagnetic shielding materials can meet the above conditions at the same time

Method used

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  • Viewing glass for radio frequency electromagnetic screen and method for preparing same

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Experimental program
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Effect test

Embodiment 1

[0022] 1) Use 3mm white glass as the coating substrate, first soak and clean it with a special glass cleaning solution, then place it in an acetone solution for ultrasonic vibration cleaning, then rinse it with deionized water, and finally dry it with clean hot air, put it into the electron beam evaporation studio, at 10 -5 Under Pa background vacuum, Ar gas was introduced, and the substrate surface was cleaned again by ion bombardment. The ion bombardment voltage was 1.4kV, the bombardment current was 90mA, and the bombardment time was 16min.

[0023] 2) Heating the substrate temperature to 300°C, filling it with pure oxygen, and evaporating the ITO metal oxide film by electron beam evaporation, controlling the vacuum degree of the studio to 4.8×10 -2 Pa, beam current 10mA, oxygen flow rate 75ml / min, deposition rate 0.7 angstroms / second.

[0024] 3) Turn off the oxygen and heating device in the working room. After cooling to room temperature, use electron beam evaporation to...

Embodiment 2

[0028] 1) Use 3mm white glass as the coating substrate, first soak and clean it with a special glass cleaning solution, then place it in an acetone solution for ultrasonic vibration cleaning, then rinse it with deionized water, and finally dry it with clean hot air, put it into the electron beam evaporation studio, at 10 -5 Under Pa background vacuum, Ar gas was introduced, and the substrate surface was cleaned again by ion bombardment. The ion bombardment voltage was 2.0kV, the bombardment current was 120mA, and the bombardment time was 12min.

[0029] 2) Heating the substrate temperature to 330°C, filling with pure oxygen, and evaporating ITO metal oxide film by electron beam evaporation, controlling the vacuum degree of the studio to 5.0×10 -2 Pa, beam current 30mA, oxygen flow rate 90ml / min, deposition rate 2.0 angstroms / second.

[0030] 3) Turn off the oxygen and heating device in the working room. After cooling to room temperature, use electron beam evaporation to evapo...

Embodiment 3

[0034] 1) Use 3mm white glass as the coating substrate, first soak and clean it with a special glass cleaning solution, then place it in an acetone solution for ultrasonic vibration cleaning, then rinse it with deionized water, and finally dry it with clean hot air, put it into the electron beam evaporation studio, at 10 -5 Under Pa background vacuum, Ar gas was introduced, and the substrate surface was cleaned again by ion bombardment. The ion bombardment voltage was 2.5kV, the bombardment current was 180mA, and the bombardment time was 10min.

[0035] 2) Heating the substrate temperature to 350°C, filling with pure oxygen, and evaporating ITO metal oxide film by electron beam evaporation, controlling the vacuum degree of the studio to 5.2×10 -2 Pa, beam current 50mA, oxygen flow rate 100ml / min, deposition rate 2.5 angstroms / second.

[0036] 3) Turn off the oxygen and heating device in the working room. After cooling to room temperature, use electron beam evaporation to evap...

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Abstract

The invention discloses a sight glass for shielding radio frequency electromagnetic wave, which consists of a first white glass layer, a first transparent and conductive ITO metallic oxide film layer, a first metal film layer with silver and titanium alloy, a PU doubling layer, a second metal film layer with silver and titanium alloy, a second transparent and conductive ITO metallic oxide film layer and a second white glass layer in sequence. By combining with the glass doubling technology, the sight glass of the invention is prepared by adopting electron beam evaporation to deposit an ITO / Ag-Ti alloy bilayer film in situ. The sight glass for shielding radio frequency electromagnetic wave of the invention has high intensity, low cost and the shielding efficiency of more than 30dB on the radio frequency electromagnetic wave of 30MHz-5GHz. Meanwhile, the sight glass of the invention has good permeability against visible light while the permeability rate is more than 70 percent, solving the technical problem that the transmittance of light and the electromagnetic shielding of the existing ITO coated glass and wire mesh interlayer shielding glass products can not be realized at the same time.

Description

technical field [0001] The invention relates to a radio frequency electromagnetic wave shielding window glass and a preparation method thereof. Background technique [0002] In today's world, while electromagnetic wave technology brings great convenience to people, it also brings obvious negative effects, namely: electromagnetic interference (EMI), electromagnetic information leakage, and potential harm caused by electromagnetic waves to human health, such as: physiological, Nervous disorders and carcinogenic, teratogenic, mutagenic, etc. At present, the man-made environmental electromagnetic energy density is growing rapidly at a rate of 7-14% per year. Electromagnetic radiation pollution has become the fifth largest public hazard recognized in the world. Among them, electromagnetic radiation in the 30MHz-5GHz radio frequency band has attracted the most attention. . The electromagnetic wave shielding transparent window materials that have appeared in recent years can not ...

Claims

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Application Information

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IPC IPC(8): C03C27/10C03C17/36H05K9/00G12B17/02
Inventor 平柏战张溪文金朝良刘化文
Owner 杭州百高实业有限公司
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