How Does Sputtering Work?
Sputtering is done in a vacuum chamber into which an inert gas is introduced – in most cases, argon. Two items are placed into that chamber: the item to be plated, and the “target” that contains the material that will be applied. A negative electrical charge is applied to the target, causing some of the electrons that it contains to travel to the material to be coated. Presto! You’ve got a thin film of plating right where you want it. But note that the use of the term “target” can be confusing, since it is the source of the plating material that is used, not its final destination.