| 摘要 |
A silver alloy sputtering target for forming Ag alloy reflective layer of optical recording media such as magneto-optical recording disks (MD, MO) and optical recording disks (CD-RW, DVD-RAM) is provided. The sputtering target is made of (1) a silver alloy having a composition of 0.5 to 3% by mass of Cu and 0.1 to 3% by mass in total of one or more elements selected from among Dy, La, Nd, Tb and Gd, with the remainder consisting of Ag; (2) a silver alloy having a composition of 0.5 to 3% by mass of Cu and 0.005 to 0.05% by mass in total of one or more elements selected from among Ca, Be and Si, with the remainder consisting of Ag; or (3) a silver alloy having composition of 0.5 to 3% by mass of Cu, 0.1 to 3% by mass in total of one or more elements selected from among Dy, La, Nd, Tb and Gd and 0.005 to 0.05% by mass in total of one or more elements selected from among Ca, Be and Si, with the remainder consisting of Ag. |
