{HEAD ~ A silver based alloy thin film} is provided for {TAIL ~ the highly reflective or semi reflective coating layer} of optical discs 
is provided for
{ HEAD ~ A silver based alloy thin film } is provided for { TAIL ~ the highly reflective or semi reflective coating layer } of optical discs
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH