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Reagent for preventing silver of LED silver bracket from discoloring and preparation and film forming methods

A film-forming method and color-changing agent technology, which can be used in the coating process of metal materials, electrical components, circuits, etc., can solve the problem that the discoloration of the silver substrate cannot be completely eliminated, the gas barrier property of the encapsulated molecules is not strong, and the synthesis process of polysilazane Complicated and other issues, to achieve the effect of being suitable for large-scale promotion, not affecting the later packaging process, and tightly combined

Active Publication Date: 2016-08-17
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former method is easy to operate, but the increase in the density of the silicone will lead to a decrease in the luminous flux of the LED, and the gas barrier properties of the encapsulating molecules are not strong, so the discoloration of the silver substrate cannot be completely eliminated.
The latter method can improve the anti-sulfur performance of LED components well, but its polysilazane synthesis process is complicated and the operation process is cumbersome, which increases the production cost

Method used

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  • Reagent for preventing silver of LED silver bracket from discoloring and preparation and film forming methods
  • Reagent for preventing silver of LED silver bracket from discoloring and preparation and film forming methods
  • Reagent for preventing silver of LED silver bracket from discoloring and preparation and film forming methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Preparation of component A of anti-silver discoloration agent for LED silver bracket: Take 40mL ethanol in a 100mL beaker, add dropwise 3.5mL deionized water, 1.6mL acetic acid, shake well, then add 0.7mL 3-mercaptopropyltriethoxysilane, stir (room temperature, medium speed) 18 hours. You can drop a drop of the solution on a glass slide and dry it in an oven at 100°C. If it is a transparent glass body, it can be used. After preparation, store at room temperature at 15°C until use. The solution is A1.

[0042] Preparation of component B of anti-silver discoloration agent for LED silver bracket: Take 4mL of ethanol in a 20mL vial, add 3mL of deionized water and 1.2mL of vinyl tris(2-methoxyethoxy)silane dropwise into it, and let it stand for 24 hours. After preparation, store at room temperature (15°C) for later use. The solution is B1.

Embodiment 2

[0044] Preparation of component A of anti-silver discoloration agent for LED silver bracket: Take 40mL of ethanol in a 100mL beaker, add dropwise 5mL of deionized water, 2.5mL of acetic acid, shake well, then add 1.0mL of 3-mercaptopropyltriethoxysilane, stir ( room temperature, medium speed) for 20 hours. You can drop a drop of the solution on a glass slide and dry it in an oven at 150°C. If it is a transparent glass body, it can be used. After preparation, store at room temperature at 25°C until use. The solution is A2.

[0045] Preparation of component B of anti-silver discoloration agent for LED silver bracket: Take 4mL of ethanol in a 20mL vial, add dropwise 3mL of deionized water, 1.2mL of vinyl tris(2-methoxyethoxy)silane, and let it stand for 24h. After preparation, store at room temperature at 25°C until use. The solution is B2.

Embodiment 3

[0047] Preparation of component A of anti-silver discoloration agent for LED silver bracket: Take 40mL of methanol in a 100mL beaker, add dropwise 5mL of deionized water, 1.6mL of formic acid, shake well, then add 1.0mL of 3-mercaptopropyltrimethoxysilane, stir (room temperature , medium speed) for 24 hours. It can be taken by taking a drop of the solution and dropping it on a glass slide, and drying it in a 100°C oven. If there is a transparent glass body, it can be used. After preparation, store at room temperature at 20°C until use. The solution is A3.

[0048] Preparation of component B of anti-silver discoloration agent for LED silver bracket: Take 4mL of ethanol in a small bottle, add 3mL of deionized water, 0.6mL of acetic acid, and 1.2mL of vinyltriethoxysilane dropwise into the vial, and let it stand for 24 hours. After preparation, store at room temperature at 20°C until use. The solution is B3.

[0049] 2. Preparation of anti-silver discoloration agent for LED s...

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Abstract

The invention discloses a reagent for preventing silver of an LED silver bracket from discoloring and preparation and film forming methods. The reagent for preventing silver from discoloring is prepared from a sulfydryl-containing silane coupling agent and one or two vinyl-containing silane coupling agents capable of being compatible with package resin. The LED silver bracket which is equipped with gold wires but is not packaged with resin is soaked into a silane coupling agent mixing solution with sulfydryl and vinyl in the end group, so that a two-layer-like polysiloxane composite thin film can be quickly generated on the silver-based surface. High bonding force can be generated between the polysiloxane composite thin film and silver, and the polysiloxane composite thin film is high in compatibility with the package resin on the surface. The reagent for preventing silver from discoloring is high in sulfur prevention capacity and low in cost, and cannot affect the later packaging process; the synthesis process is simple, and the subsequent use and operation are simple and convenient; therefore, the reagent is suitable for large-scale popularization, and has the advantages of not polluting the environment and the like.

Description

technical field [0001] The invention relates to a convenient and fast method for preventing silver or silver-plated materials from vulcanization and discoloration, in particular to a method for preventing sulfur discoloration of LED silver brackets. Background technique [0002] In recent years, due to the many advantages of light-emitting diode (LED) lamps such as high efficiency, energy saving, long life, wide application range, and environmental protection, the entire LED industry has developed rapidly both at home and abroad. However, with the prolongation of use time, the LED light will gradually become darker, the light decay will increase rapidly, the luminous flux will decrease significantly, the service life of the lamp will become shorter, and in severe cases, the phenomenon of dead light will even occur. This problem is exacerbated by air pollution. The reason is that silver or silver-plated materials are generally used as the bracket base for LED lights at prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/02C23C22/58H01L33/56
CPCC23C22/02C23C22/58C23C2222/20H01L33/56
Inventor 陈超万明明金海超赵丹张宁
Owner NANCHANG UNIV
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