1. The faster the etching speed, the greater the amount of metal etching per unit time, the increase in heat generation, and the rapid temperature change of the etching solution, which is not conducive to the stability of the etching speed;
2. The etching speed is too fast, and the processing of parts with very precise depth requirements is not easy to control;
3. The faster the etching speed, the lower the quality of the etched metal surface, which obviously affects the smoothness and gloss of the etched surface;
4. High etching speed often requires high concentration of etchant, high corrosive chemical reagent, high etching temperature, etc. One of these factors increases the cost of the etchant, and at the same time, the requirements for the anti-etching layer increase, and the cost increases.
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