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Production method of environment-friendly zinc-tin gold

A production method and technology of zinc-tin-gold, applied in the chemical field, can solve problems such as unenvironmental protection, and achieve the effects of no heat loss, small wetting angle, and stable plating solution

Inactive Publication Date: 2019-05-21
戴峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the existing production method is not environmentally friendly, the present invention adopts an environment-friendly production method of zinc tin gold

Method used

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  • Production method of environment-friendly zinc-tin gold
  • Production method of environment-friendly zinc-tin gold
  • Production method of environment-friendly zinc-tin gold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 zinc tin bath:

[0029]

[0030]

Embodiment 2

[0031] Embodiment 2 zinc tin bath:

[0032]

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PUM

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Abstract

The invention provides a production method of environment-friendly zinc-tin gold. According to the method, a circuit is etched, and a circuit board is treated through solder resist ink; then pre-treatments such as grinding-brushing or sand blasting are performed; then the circuit board is put in an oil removal trough to be treated for 5 minutes; then the circuit board is cleaned with tap water anddelivered into a microetching trough to be treated for 2 minutes; then the circuit board is cleaned with deionized water and enters a pre-impregnation trough to be treated for 1 minute; then the circuit board directly enters an activated bath to be treated for 1 minute; then the circuit board is cleaned with deionized water, and treatment is performed for 20 minutes in chemical zinc tin under thetemperature of 80 DEG C; and then cleaning is performed with deionized water, and treatment is performed for 10 minutes in chemical gold prepared with 10% of KOZO 806 and citric acid gold of 2 gramsper liter under the temperature of 88 DEG C. By means of the production method of the environment-friendly zinc-tin gold, the technical problem that existing production methods are not environmentallyfriendly is solved, lead in chemical zinc tin is replaced, the chemical zinc tin is completely environmentally friendly, and defective solder zinc tin does not occur. Toxic potassium gold cyanide inthe chemical gold is replaced, the chemical gold is completely environmentally friendly, and a solution is stable and is not decomposed.

Description

technical field [0001] The invention relates to the chemical field, in particular to an environment-friendly production method of zinc tin gold. Background technique [0002] The existing zinc-tin-gold production method is to replace a small amount of palladium on the copper surface of the circuit, so that the circuit uses palladium as the catalytic core to deposit a layer of phosphorus containing about 7-10% in the chemical zinc-tin bath. 4 microns of thick zinc-tin-phosphorus alloy layer (phosphorus is chemical zinc-tin reaction by-product eutectic in the zinc-tin layer), on this zinc-tin-phosphorus alloy layer, replace a layer of 0.07 micron gold layer with the method of replacement. Chemical zinc tin gold is a powerful surface treatment in circuit boards. It can be used in electronic products such as mobile phone keypads, computer memory sticks, etc. It can be used as soldering parts and at the same time as current conduction contacts. But in fact it is a process that i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/48C23C18/18
Inventor 戴峰
Owner 戴峰