A kind of chemical treatment method of pcb electroplating copper bath

Abstract

The invention discloses a chemical water treatment method for a PCB (printed circuit board) electro-coppering trough. The method comprises the following steps: (1) pumping chemical water in an electro-coppering trough into a spare trough through a filtering pump, wherein a heating device and a blower device are arranged outside the spare trough; (2) adding 3-5ml / l of industrial hydrogen peroxide with concentration of 50-70%, and starting the blower device; (3) starting the heating device, controlling the temperature in the spare trough at 65-70DEG C, lowering temperature to less than 40DEG C after two hours, adding active carbon powder to 4-5g / l, and stopping the blower device so as to stop air stirring; and (4) standing chemical water for 8-10 hours, and pumping the treated chemical water back to the electro-coppering trough to reuse through the filtering pump. The chemical water pollution degree in the copper trough is obviously reduced through the method disclosed by the invention while the cost is low, the chemical water can be reused, not only is the production quality guaranteed, but also the pressure of waste water treatment is reduced; and therefore, the energy conservation and environmental protection in the production process of the PCB are realized.

Description

technical field [0001] The invention relates to a PCB board electroplating process, in particular to a PCB electroplating copper tank liquid treatment method. Background technique [0002] In the PCB board manufacturing industry, in order to realize graphic transfer, most enterprises use dry film process for graphic transfer, and then use graphic electroplating to realize the circuit function of PCB board. Since the dry film in the dry film process is a high-molecular organic matter, it will gradually dissolve after long-term immersion in high-acidity electroplating potions, so that the content of organic pollutants in the potion in the electroplating copper bath will continue to increase; and under the action of current, light The agent may decompose in a small amount and further pollute the electroplating solution. With more and more pollutants, the color of the potion in the electroplating copper bath gradually changes from blue to green, and the ductility and tensile st...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a method for treating PCB electroplating copper bath potion, which can effectively solve the problem of high treatment cost when there are too many pollutants in electroplating potion, and realize copper plating at a relatively low cost. Pollution degree of potion water is significantly reduced, and the reuse of potion not only effectively guarantees the production quality, but also greatly reduces the pressure of wastewater treatment, so as to realize energy saving and environmental protection in the process of PCB board production