Metal is generally the name of the chemical elements which own metallic luster and good plasticity, electric conductivity and thermal conductivity. This kind of classification derives from the industrial taxonomy gradually formed in the history. It is still in use today although the naming method does not strictly prove to be scientific. Metal sputtering targets are usually made from highly pure metals. They are the most widely used and fundamental coating materials for other sputter deposition technology. Such sputtering targets as ultrapure aluminum, copper, silver and gold are quite common in modern industry. Metal sputtering target is demanded to be as superficially smooth as possible under the numerical control process. For example, the metallic film coated by sputtering methods should reflect at least 80% laser so that the compression molding disc can be read out by the player with enough signal intensity.