The effect of etching speed on the process in etching processing

Etching speed and the amount of side corrosion is the most important parameter in the chemical etching process, the amount of side corrosion determines the accuracy of the chemical etching process, the smaller the amount of side corrosion, the higher the processing accuracy, the wider the scope of use, and vice versa, the lower the processing accuracy, the scope of use is narrowed. In a variety of metal processes, copper is the smallest amount of side corrosion, aluminum is the largest amount of side corrosion. Chemical etching process etching speed determines the length of the etching process cycle, the faster the etching speed, the shorter the etching process cycle, the higher the productivity. Etching speed is not the faster the better, mainly for the following reasons:

1. The faster the etching speed, the greater the amount of etching on the metal per unit of time, the greater the amount of heat production, the temperature of the corrosive fluid changes quickly, is not conducive to a constant etching speed.

2. The faster the etching speed, for the depth of the requirements of very precise metal processing is not easy to control

3. The faster the etching speed, the lower the quality of the metal surface after etching, obviously affecting the smoothness and gloss of the etched surface

4. High etching speed often requires high concentration of etchant concentration, high corrosive chemicals, high etching temperature.

For the etching of a larger amount of material, the use of "first fast and then slow" is the first etching speed faster etching solution for a etching, when the etching depth is close to the design requirements of the value of the etching, and then change the etching speed of the slower etching solution for precision etching, despite the increase in the process, but shorten the processing time, and at the same time also ensure that the etching accuracy and surface Glossiness.