So, how exactly does metal photo etching work? The process starts with a thin sheet of metal, typically aluminum, stainless steel, or copper, which is coated with a light-sensitive photoresist material. A high-resolution image of the desired part is then transferred onto the photoresist using a photographic mask and UV light exposure. The areas not exposed to light are protected by the photoresist, while the exposed areas are chemically etched away.
Once the metal sheet is developed, it undergoes a chemical etching process that dissolves the unprotected areas, leaving behind the precise design of the part. The remaining metal is thoroughly cleaned and inspected to ensure that the dimensions and tolerances meet the required specifications. Additional processes, such as forming, plating, or heat treating, can be performed to further enhance the part’s properties.
Advantages of metal photo etching