Method for constructing environmentally-friendly water-saving gum residue-removing electroless copper deposition line

Abstract

The invention relates to the technical field of printed circuit board processing, and particularly relates to a method for constructing an environmentally-friendly water-saving gum residue-removing electroless copper deposition line. According to the chemical characteristics of each chemical treatment cylinder, each of the different chemical characteristics or the same chemical characteristics adopts the principle that the same kind of acidic water washing and acidic water washing overflows are combined, the alkaline water washing and alkaline water washing overflows are combined, and the acidic water washing and the alkaline water washing are neutralized mutually, so that the pollution concentration of the water quality of sewage water can be effectively reduced, the problem of large water consumption and large sewage discharge amount can be effectively solved, the environmental pollutions can be reduced, and meanwhile, the role of protecting chemical potions in the latter stage through pre-impregnation can be played, the addition amount of chemical treatment potions can be reduced, and the stability and product quality of the chemical treatment potions can be improved; the chemical treatment potions are very stable, and the phenomenon of poor backlight of electroless copper deposition that is most easily caused by unclean gum removal and the pollution of other treatment stations can be completely solved; and the method is environmentally-friendly and economical, and also improves the quality of products.

Description

technical field [0001] The invention relates to the technical field of printed circuit board processing, in particular to an environmentally friendly and water-saving method for removing glue residue and chemically depositing copper wires. Background technique [0002] Desmear chemical precipitation copper line is two gantry chemical treatment lines for desmear removal and chemical copper deposition. A uniform thin layer of copper is deposited on the wall of the hole; in short, after each chemical treatment section, a water wash will be installed, and each clean water wash section is designed with a water inlet and a sewage outlet, otherwise it will lead to different stages of chemical treatment. Cross-pollution occurs between them. In order to achieve the purpose, a large amount of clean water will be used to clean and remove the residual chemical treatment chemicals on the surface of the board, and a large amount of sewage will be discharged at the same time; thus causing ...

AI Technical Summary

Problems solved by technology

[0002] Desmear chemical precipitation copper line is two gantry chemical treatment lines for desmear removal and chemical copper deposition. A uniform thin layer of copper is deposited on the wall of the hole; in short, after each chemical treatment section, a water wash will be installed, and each clean water wash section is designed with a water inlet and a sewage outlet, otherwise it will lead to different stages of chemical treatment. Cross-pollution occurs between them. In order to achieve the purpose, a large amount of clean water will be used to clean and remove the residual chemical treatment chemicals on the surface of the board, and a large amount of sewage will be discharged at the same time; thus causing a large amount of waste of water resources, environmental pollution and more high cost