High-efficiency environment-protective acidic etching solution and etching method thereof

Abstract

The invention discloses a high-efficiency environment-protective acidic etching solution. The acidic etching solution comprises an etching solution base solution, an acid etching solution I and an acid etching solution II, wherein in the etching solution base solution, the content of hydrogen ions is 0. 5g / L-1.5 g / L, the content of chloride ions is 230 g / L-260 g / L, the content of the copper ions is 120 g / L-150 g / L, and the redox potential difference of the copper ions and cuprous ions is 450-550 millivolt, the content of chlorate ions in the acidic etching solution I is 80 g / L-180 g / L, and thecontent of the hydrogen ions in the acid etching solution II is 100 g / L-200 g / L. The invention further discloses an etching method of the high-efficiency environment-protective acidic etching solution. The method has the advantages of being high in etching efficiency, small in pollution and the like, the etching efficiency is effectively improved, the pollution is reduced, the production cost issaved, and the production efficiency of a circuit board is improved.

Description

technical field [0001] This field belongs to the technical field of circuit board etching, and specifically designs a high-efficiency and environment-friendly acid etching solution and an etching method thereof. Background technique [0002] With the rapid development of the electronic field, PCB is also more and more widely used. Etching is an important process in the production process of circuit boards. In the prior art, concentrated hydrochloric acid is generally used for etching, but concentrated hydrochloric acid is very volatile in the air. Due to the strong volatility of concentrated hydrochloric acid, the volatilized hydrogen chloride gas will combine with water vapor in the air to form hydrochloric acid fumes and spread in the air, which not only makes the production workshop have a strong pungent smell, but also affects the operation of the operator when inhaling hydrochloric acid fumes. If you are healthy, the direct discharge of exhaust gas will pollute the envi...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the technical problem to be solved in the present invention is a high-efficiency environment-friendly acid etching solution and its etching method with high etching efficiency and little pollution, thereby effectively improving the etching efficiency, reducing pollution, and saving production costs. Improved production efficiency of circuit boards