The modern etching process enables use of a multitude of different materials and chemicals. Etching is used to create an incised design on the surface of a component by using strong acid applied to unprotected areas of the part in question. Under the microfabrication umbrella, etching can also be used to remove layers of a wafer’s surface via chemical means.
Etching also provides the basis for a number of variations of the process, such as photochemical milling and microfabrication etching. As well as being used for decorative purposes, these etching variations are commonly utilised within the electronics and technology industries. It is an essential process within the manufacture of many electronic components - the most notable being circuit boards.