| 摘要 |
PROBLEM TO BE SOLVED: To provide a silver alloy sputtering target for forming an Ag alloy reflection layer of an optical recoding medium such as an optical recording disk CD-RW, DVD-RAM. SOLUTION: The silver alloy sputtering target consists of: a silver alloy (1) having a composition containing, by mass, 0.5 to 5% Al, and one or more kinds selected from Ca, Be and Si by 0.005 to 0.05% in total, and the balance Ag; a silver alloy (2) having a composition containing 0.5 to 5% Al, and one or more kinds selected from Dy, La, Nd, Tb and Gd by 0.1 to 3% in total, and the balance Ag; or a silver alloy (3) having a composition containing 0.5 to 5% Al, and one or more kinds selected from Ca, Be and Si by 0.005 to 0.05% in total, and one or more kinds selected from Dy, La, Nd, Tb and Gd by 0.1 to 3% in total, and the balance Ag. |
