Silver-reactive metal alloys for optical data storage and recordable storage media containing same
View Patent ↗An optical data recording and storage medium that includes a reflective layer formed from a silver alloy that contains, in addition to silver, about 0.2 to about 1.0 wt. %, based on the total weight of alloy, of samarium (Sm), about 0.2 to about 2.0 wt. % of copper (Cu), about 0.1 to about 0.3 wt. % of titanium (Ti), and about 0.2 to about 0.8 wt .% of manganese (Mn).
1. An optical data recording and storage medium comprising a substrate and at least one reflective layer able to transmit and reflect laser light, the layer formed from a silver-based alloy containing at least 97.0 wt. % silver and based on the total weight of alloy, from about 0.2 to about 1.0 wt. % samarium (Sm) and from about 0.2 to about 2.0 wt. % copper (Cu).
2. The optical data recording and storage medium of claim 1 wherein said silver-based alloy comprises from about 0.25 to about 0.35 wt. % , based on the total weight of alloy, of samarium (Sm).
3. The optical data recording and storage medium of claim 1 wherein said silver-based alloy comprises from about 0.25 to about 1.0 wt. % copper (Cu).
4. The optical data recording and storage medium of claim 1 wherein said silver-based alloy further comprises from about 0.05 to about 0.5 wt. % titanium (Ti).
5. The optical data recording and storage medium of claim 4 wherein said silver-based alloy comprises from about 0.1 to about 0.3 wt. % titanium (Ti).
6. The optical data recording and storage medium of claim 1 wherein said silver-based alloy further comprises from about 0.1 to about 1.5 wt. % manganese (Mn).
7. The optical data recording and storage medium of claim 6 wherein said silver-based alloy comprises from about 0.2 to about 0.8 wt. % manganese (Mn).
8. The optical data recording and storage medium of claim 1 wherein said silver-based alloy consists essentially of from about 0.2 to about 1.0 wt. % samarium (Sm), from about 0.2 to about 2.0 wt. % copper (Cu), from about 0.1 to about 0.3 wt. % titanium (Ti), and manganese (Mn), the balance being silver (Ag).
9. The optical data recording and storage medium of claim 1 wherein said silver-based alloy consists essentially of from about 0.25 to about 0.35 wt. % samarium (Sm), from about 0.25 to about 1.0 wt. % copper (Cu), from about 0.1 to about 0.3 wt. % titanium (Ti), and from about 0.2 to about 0.8 wt. % manganese (Mn), the balance being silver (Ag).
10. The optical data recording and storage medium of claim 9 wherein said silver-based alloy consists essentially of about 0.3 wt. % samarium (Sm), about 0.7 wt. % copper (Cu), about 0.2 wt. % titanium (Ti), and about 0.5 wt. % manganese (Mn), the balance being silver (Ag).