Process principle of PCB etching machine

The principle of etching process

In a professional sense, the principle of etching refers specifically to the process by which metals are etched according to design and process requirements through professional means Etching machine A controlled corrosion behavior is carried out. Through this controlled chemical process, certain specific design requirements can be met, which cannot be achieved by traditional mechanical processing methods. Metallic chemical corrosion, which refers to the chemical damage caused by the chemical destruction of metals in natural environments, is widely accepted as the chemical loss behavior of metals caused by chemical or electrochemical reactions in contact with the surrounding environment. From this definition, various types of corrosion of metals are actually chemical losses of metals. There are four popular language expressions for metal chemical damage: chemical etching, chemical etching, chemical milling, and chemical etching. These four statements can be understood from the following aspects:

Etching equipment

Chemical corrosion: Chemical corrosion is a common phenomenon and process of metal chemical loss, including destructive corrosion commonly referred to in various corrosion environments, as well as corrosion caused by controlled processing using chemical methods. From the perspective of the entire process, it includes both uncontrolled corrosion and controlled etching, which is a general term for metal chemical loss and a chemical loss behavior of metals in various chemical corrosion media. Many etching machine manufacturers use this etching method.

Chemical etching: Chemical etching is very targeted and refers to controlled etching. It is a controllable processing method for metals through chemical methods. Chemical etching can be divided into chemical milling and chemical texture etching based on the surface effect and X requirements after etching.

Chemical milling: Chemical milling has the same meaning as mechanical milling, only using different processing methods. Chemical milling requires the surface after chemical etching to have the highest possible surface smoothness, the lowest possible surface roughness, and the highest possible engraving accuracy.

Chemical etching: Chemical texture etching refers to the surface effect with a certain roughness after chemical etching, and the size of this roughness can be adjusted within a certain range by controlling the chemical and physical indicators of the process. Chemical indicators include: the type of corrosive agent used and the concentration ratio between them; The physical indicators include etching temperature, etching time, and etching method.