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Weakly alkaline smokeless tin spraying soldering flux and preparation method thereof

A weak alkaline and flux technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve environmental pollution and other problems, achieve high safety, avoid pollution, and improve the effect of soldering rate

Pending Publication Date: 2022-08-02
GUANGDONG HAFU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, commonly used inorganic fluxes usually contain strong acids, which will not only pollute the environment, but also cause operators to inhale strong acid fumes during actual operation. Therefore, it is particularly important to develop fluxes that do not contain strong acids and have good fluxing properties.

Method used

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  • Weakly alkaline smokeless tin spraying soldering flux and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] A preparation method of a tin-spraying flux, comprising the following steps: weighing the following raw materials by weight: 5% of choline, 1% of biquinol, 0.5% of tetraethylamine perfluorooctanesulfonate, Tetrahydrofurfuryl alcohol 10%, benzotriazole 0.3%, polyethylene glycol monomethyl ether 250 15%, polyethylene glycol 20%, deionized water 48.2%; deionized water, choline, perfluorooctyl The sulfonic acid tetraethylamine was added to the reaction kettle in turn and stirred. After it was completely dissolved, tetrahydrofurfuryl alcohol, polyethylene glycol, polyethylene glycol monomethyl ether 250, benzotriazole and biquinol were added and stirred. After 1.5 hours, the raw materials were fully mixed and dissolved, and the mixture was allowed to stand for 30 minutes, and then the tin-spraying flux was obtained by filtration.

Embodiment 2

[0022] A preparation method of tin-spraying flux, comprising the following steps: weighing the following raw materials by weight: 4% of choline, 1% of biquinol, 0.5% of tetraethylamine perfluorooctanesulfonate, Divalent ester (DBE) 15%, benzotriazole 0.3%, polyethylene glycol monomethyl ether 250 10%, polyethylene glycol 30%, deionized water 39.2%; deionized water, choline, Tetraethylamine perfluorooctane sulfonate was added to the reaction kettle in turn and stirred. After it was completely dissolved, dibasic acid ester (DBE), polyethylene glycol, polyethylene glycol monomethyl ether 250, and benzotrioxide were added in turn. The azole and biquinol were stirred for 1.5 hours to fully mix and dissolve the raw materials, let stand for 30 minutes, and filtered to obtain the tin-spraying flux.

Embodiment 3

[0024] A preparation method of tin-spraying flux, comprising the following steps: weighing the following raw materials by weight: 6% of choline, 1.5% of biquinol, 1.5% of tetraethylamine perfluorooctanesulfonate, Glycerol 10%, ethylene glycol 5%, benzotriazole 0.5%, polyethylene glycol monomethyl ether 250 20%, polyethylene glycol 20%, deionized water 41.5%; Alkali and tetraethylamine perfluorooctanesulfonate were added to the reaction kettle in turn and stirred. After being completely dissolved, glycerol, polyethylene glycol, polyethylene glycol monomethyl ether 250, and benzotriazole were added in turn. , Stir biquinol for 1.5 hours to fully mix and dissolve the raw materials, let stand for 30 minutes, and filter to obtain tin-spraying flux.

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Abstract

The invention discloses a weakly alkaline smokeless tin spraying soldering flux and a preparation method thereof. The weakly alkaline smokeless tin spraying soldering flux comprises the following components in percentage by weight: 5.0%-25.0% of an auxiliary agent, 10.0%-50.0% of a film-forming agent, 1.0%-10.0% of an active agent, 0.1%-2.0% of a stabilizer, 0.1%-2.0% of a surfactant, 0.1%-2.0% of a corrosion inhibitor and the balance of water. Comprising the following steps: sequentially adding the auxiliary agent, the film-forming agent, the active agent, the stabilizer, the surfactant, the corrosion inhibitor and the water into a reaction kettle, stirring to fully mix and dissolve the raw materials, standing, and filtering to obtain the tin-spraying soldering flux. Compared with a traditional soldering flux, the soldering flux has the advantages that strong acid smog is not generated in the using process of the soldering flux, no irritant gas is generated, the soldering flux is basically harmless to the human body, the tinning rate of a small BGA bonding pad (the diameter is 0.5-0.1 mm) can be effectively increased, and the dense IC position wiring problem is effectively solved.

Description

technical field [0001] The invention relates to the technical field of electronic packaging welding materials, in particular to a weakly alkaline smokeless tin spraying flux and a preparation method thereof. Background technique [0002] Flux is an auxiliary material to ensure the smooth progress of the soldering process. It is widely used in the welding process of electronic product manufacturing and greatly affects the quality of electronic products. The main function of the flux is to remove the oxides on the surface of the solder and the base metal to be welded, so that the metal surface can achieve the necessary cleanliness. It prevents the re-oxidation of the surface during soldering, reduces the surface tension of the solder, and improves the soldering performance. [0003] However, the commonly used inorganic fluxes usually contain strong acids, which will not only pollute the environment, but also cause operators to inhale strong acid fumes during actual operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
CPCB23K35/362
Inventor 陈干林建辉张军杨缘吴志彬陈嘉龙何艳宁陈荣毅冼素霞
Owner GUANGDONG HAFU SCI & TECH
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