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A preparation method of a high-transmission and high-corrosion coating suitable for high-frequency printed antennas

An anti-corrosion coating and antenna technology, applied in the structural form of the radiating unit, the structural form of the radiating element, etc., can solve the problems of the large influence of the transmission index and the inability to meet the transmission performance of high-frequency electromagnetic waves at the same time, and achieve high environmental corrosion resistance, Scientifically designed, cleverly conceived effects

Active Publication Date: 2022-07-05
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a method for preparing a high-transmission and high-corrosion coating suitable for high-frequency printed antennas, so as to solve the problem that the protective coating has a large impact on the transmission index of high-frequency printed antennas in the prior art and cannot meet both resistance and corrosion resistance requirements at the same time. Environmental corrosion does not affect the dual requirements of high-frequency electromagnetic wave transmission performance

Method used

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  • A preparation method of a high-transmission and high-corrosion coating suitable for high-frequency printed antennas
  • A preparation method of a high-transmission and high-corrosion coating suitable for high-frequency printed antennas
  • A preparation method of a high-transmission and high-corrosion coating suitable for high-frequency printed antennas

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preparation example Construction

[0061] A method for preparing a high-transmittance and high-corrosion coating suitable for high-frequency printed antennas comprises using liquid hexafluoropropane as a coating and 1,1-diphenyl-2-trinitrophenylhydrazine as a polymerization inhibitor; The method includes the following steps:

[0062] S1. Laser anchor base: use laser to process the microstructure on the coating surface of the high-frequency printed antenna, as the anchor base for the fluorocarbon coating;

[0063] S2. Plasma-enhanced chemical vapor deposition: Using plasma chemical vapor deposition, hexafluoropropane is deposited on the surface of the high-frequency printed antenna after S1 treatment to form a fluorocarbon coating;

[0064] S3. Residual free radical control: inject vaporized 1,1-diphenyl-2-trinitrophenylhydrazine into the vacuum chamber, capture free radicals, prevent polymer chain reaction, and complete the preparation process of fluorocarbon coating .

[0065] Preferably, the microstructure ...

Embodiment 1

[0093] The present embodiment discloses a method for preparing a high-transmittance and high-anti-corrosion coating of a high-frequency printed antenna. The high-frequency printed antenna substrate used in this embodiment is as attached figure 1 shown. The surface of the material consists of two parts, one part is a metal pattern and the other part is a medium. Among them, the metal pattern material is copper gold plating, and the dielectric material is PTFE glass fiber composite material.

[0094] S1. Laser anchor bottom, its principle is as attached Figure 5 shown;

[0095] After cleaning the surface of the antenna with absolute ethanol, use the image recognition device of the laser processing equipment to accurately divide the area where the PTFE glass fiber composite material is located, as shown in the attachment. image 3 shown.

[0096] like Figure 4 As shown, according to the working frequency band of the high-frequency printed antenna and the environmental cor...

Embodiment 2

[0121] Compared with Embodiment 1, this embodiment differs in that the parameters of step S2 and step S3 are different, and other conditions are the same.

[0122] S21. The chamber is heated to 60°C and kept for 20min;

[0123] S22. The chamber is evacuated to -10Pa;

[0124] S23. After the liquid hexafluoropropane is vaporized by the ultrasonic vaporization device, it is injected into the vacuum chamber, the flow rate is 100sccm, the time is 8min, and the chamber temperature is kept at 100℃;

[0125] S24. Input voltage 100V, current 10A, discharge time 8min.

[0126] S3. Residual Radical Control

[0127] The vaporized polymerization inhibitor 1,1-diphenyl-2-trinitrophenylhydrazine solution was injected, the flow rate was 30 sccm, the chamber temperature was 60 °C, and the time was 5 min.

[0128] The performance test of the fluorocarbon coating prepared in this example is carried out, and the test method is the same as that of Example 1.

[0129] The results show that the...

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Abstract

The invention discloses a preparation method of a high-transmittance and high-corrosion coating suitable for high-frequency printed antennas, belonging to the technical field of protective coatings in the field of high-frequency communication antennas, and solves the problem that the prior art cannot satisfy both environmental corrosion resistance and high corrosion resistance at the same time. Problems affecting the transmission performance of high-frequency electromagnetic waves. The coating preparation method of the present invention uses liquid hexafluoropropane as a coating, and uses 1,1-diphenyl-2-trinitrophenylhydrazine as a polymerization inhibitor, and the method comprises the following steps: S1. Laser anchor bottom; S2. Plasma Enhanced Vapor Deposition; S3. Residual Radical Control. The fluorocarbon coating prepared by the method of the invention has no effect on the transmission of the high-frequency signal of the antenna, and the coating can be attached to the polytetrafluoroethylene composite substrate and the gold-plated surface with high strength at the same time, and has strong environmental corrosion resistance; In the 18-60GHz frequency band, the wave transmittance of the coating is greater than or equal to 95%, the adhesion of the coating is greater than or equal to level 1, and the salt spray resistance time of the coating is greater than or equal to 192 hours.

Description

technical field [0001] The invention belongs to the technical field of protective coatings in the field of high-frequency communication antennas, and in particular relates to a method for preparing a high-transmission and high-corrosion coating suitable for high-frequency printed antennas. Background technique [0002] At present, the coatings used in the field of high-frequency communication antennas mainly include solvent-based coatings such as silicone, acrylic, polyurethane, and fluorine coatings, and chemical vapor deposition coatings such as Parylene series. These coatings mainly have the following problems: [0003] (1) The dielectric constant of solvent-based coating materials is high and unstable. Existing conformal protective coating materials usually have high dielectric constant and poor stability under high frequency conditions, resulting in large frequency drift and high signal distortion rate. [0004] (2) The preparation precision of solvent-based coatings ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/40H01Q1/38
CPCH01Q1/40H01Q1/38
Inventor 陈波张婧亮廖旭李琳李立胡雅婷杜小东王天石王庆兵冯守庆常义宽
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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