Patent ID: 8658003

Claim:
A method of manufacturing magnetic disks, the method comprising: providing a sputtering system having a first target and a first magnetic ring associated with the first target, and a second target and a second magnetic ring associated with the second target, the first magnetic ring including a first region of lower relative magnetic strength positioned near the second magnetic ring, and the second magnetic ring including a second region of lower relative magnetic strength positioned near the first magnetic ring; positioning a first disk at a first sputtering location within the sputtering system, the first sputtering location associated with the first target; positioning a second disk at a second sputtering location within the sputtering system, the second sputtering location associated with the second target, the second sputtering location proximate the first sputtering location; generating a first electrical potential difference between a first anode and a first cathode associated with the first sputtering location; generating a second electrical potential difference between a second anode and a second cathode associated with the second sputtering location; and concurrently sputtering material from the first target onto the first disk and material from the second target onto the second disk.