Patent ID: 9657390
Date: 2017-05-23
CPC Classifications: A61L,C23C,H01J,Y10T

Claim:
1. A method for preparing a multilayer film on a substrate, comprising: providing at least one first sputtering cathode in a deposition chamber; providing at least one second sputtering cathode in the deposition chamber, wherein the second sputtering cathode includes a sputtering material that is different from the first sputtering cathode; providing a first current to the at least one first sputtering cathode for sputtering the substrate, and increasing the first current gradually; providing a second current to the at least one second sputtering cathode for sputtering the substrate and decreasing the second current gradually; and rotating the substrate within the deposition chamber to alternatively sputter the substrate with the at least one first sputtering cathode or the at least one second sputtering cathode, wherein the first current is gradually increased and the second current is gradually decreased in a same period of sputtering.