Metal chemical etching is a subtractive manufacturing process that involves selectively removing material from a metal surface using a chemical etchant. The process begins by coating the metal substrate with a photoresist material, which is then exposed to UV light through a photomask that contains the desired design or pattern. The exposed areas of the photoresist become soluble and are washed away, leaving behind a protective mask of photoresist that corresponds to the desired design.
The metal substrate is then immersed in an etching solution that selectively dissolves the unprotected areas of the metal, creating the desired pattern on the surface. The etching process can be controlled by adjusting various parameters such as etchant composition, temperature, and agitation, allowing for precise control over the depth and profile of the etched features.
Advantages of metal chemical etching