Protective coating for optical module and preparation method thereof

A protective coating and optical module technology, applied in coatings, anti-corrosion coatings, metal material coating processes, etc., to achieve the effects of strong controllability, air tightness, and high selectivity

Active Publication Date: 2022-07-29
WUHAN HUAGONG GENUINE OPTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is difficult for the existing technology to meet the above requiremen

Method used

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  • Protective coating for optical module and preparation method thereof
  • Protective coating for optical module and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Plasma-enhanced chemical vapor deposition technology is used to sequentially form SiMO on the surface of optical components composed of PCBA, PEI Lens, etc. x Gas barrier, chemical barrier and water vapor barrier, forming a "sandwich" protective film consisting of three layers; SiMO x The thicknesses of the gas barrier layer, chemical barrier layer and water vapor barrier layer were 1 micron, 100 microns and 8 microns, respectively. The specific preparation method is as follows: put the optical component to be coated (the part that shields the gold finger) into the coating chamber, the chamber temperature is 25°C, and the door of the coating chamber is closed; the raw material bottle 1 is filled with ethyl orthosilicate, isopropyl alcohol Aluminum (molar ratio is 5:1), raw material bottle 2 is filled with TCM203, UVR6110 (molar ratio is 1:1), raw material bottle 3 is filled with 2,3,5,6-tetrafluoro-p-xylene dimer; set Coating parameters, the coating pressure is 0.01 atm...

Embodiment 2

[0033] Plasma-enhanced chemical vapor deposition technology is used to sequentially form SiMO on the surface of optical components composed of PCBA, PEI Lens, etc. x Gas barrier, chemical barrier and water vapor barrier, forming a "sandwich" protective film consisting of three layers; SiMO x The thicknesses of the gas barrier layer, chemical barrier layer and water vapor barrier layer were 2 microns, 200 microns and 10 microns, respectively. The specific preparation method is as follows: put the optical component to be coated (the part that shields the gold finger) into the coating chamber, the chamber temperature is 25°C, and the door of the coating chamber is closed; Ethyl ester and tetraethyl zirconate (molar ratio is 5:1:1), raw material bottle 2 is filled with TCM101, UVR6128 (molar ratio is 2:1), and raw material bottle 3 is filled with p-xylene dimer; set the coating Parameters, the coating pressure is 0.02 atmosphere; the feeding port is inserted into the raw material...

Embodiment 3

[0035] Plasma-enhanced chemical vapor deposition technology is used to sequentially form SiMO on the surface of optical components composed of PCBA, PEI Lens, etc. x Gas barrier, chemical barrier and water vapor barrier, forming a "sandwich" protective film consisting of three layers; SiMO x The thicknesses of the gas barrier layer, chemical barrier layer and water vapor barrier layer were 1 micron, 150 microns and 8 microns, respectively. The specific preparation method is as follows: put the optical component to be coated (shielding the gold finger part) into the coating chamber, the chamber temperature is 25°C, and the door of the coating chamber is closed; Ethyl ester (mol ratio is 5:1), raw material bottle 2 is equipped with TCM207, UVR6110 (molar ratio is 5:1), and raw material bottle 3 is equipped with p-xylene dimer; set the coating parameters, and the coating pressure is 0.01 atmosphere; Insert the feeding port into the raw material bottle 1, open the equipment, star...

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Abstract

The invention relates to the technical field of optical module airtightness, in particular to a protective coating for an optical module and a preparation method thereof.The protective coating comprises at least one of the following coatings formed on the surface of an optical module assembly: a SiMOx gas barrier layer, a chemical protective layer and a water vapor barrier layer; wherein M is any one of Al, Ti, Nb, Ta and P, and x is more than or equal to 1.5 and less than or equal to 2.0; the SiMOx gas barrier layer, the chemical protection layer and the water vapor barrier layer are prepared by adopting a chemical vapor deposition technology. The protective coating disclosed by the invention is prepared by adopting a chemical vapor deposition technology and is more environment-friendly than a liquid-phase three-proofing coating coating method, the controllability of the coating structure and components is high, and the selectivity of monomers is high; the optical assembly is coated in a low-pressure and near-room-temperature environment, so that the air tightness of the optical assembly and the chemical protection capability are effectively improved under the condition that the product reliability is not influenced; in addition, the protective coating has the advantages of simple preparation process, continuous coating, easily available raw materials, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of airtightness of optical modules, in particular to a protective coating for optical modules and a preparation method thereof. Background technique [0002] With the gradual maturity and commercialization of the fifth-generation mobile communication technology (5G), the demand for high-speed optical modules is increasing. During the operation of high-speed and long-distance optical modules, the packaging and protection performance of optical modules has become more and more High demand, such as excellent resistance to high and low temperature impact, high temperature and humidity resistance, UV resistance and ozone aging resistance, good chemical resistance and electrical insulation properties and other series of excellent properties. The problems of airtight packaging of traditional optical components are that the assembly process is long, there are many parts, and the cost is high. In addition, tradition...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D171/02C09D5/08C23C16/40C23C16/44C23C16/50
CPCC09D163/00C09D171/02C09D5/08C09D5/18C23C16/44C23C16/50C23C16/401
Inventor 方章建王珺杨倩倩韩强盛谭芮陈乐行王一鸣高云龙
Owner WUHAN HUAGONG GENUINE OPTICS TECH
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