A number of these alloys can also be used as semi reflective layers in {HEAD ~ optical storage devices} such as {TAIL ~ DVD dual layer devices} 
such as
A number of these alloys can also be used as semi reflective layers in { HEAD ~ optical storage devices } such as { TAIL ~ DVD dual layer devices }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL