OPTISCHE REGISTRATIE SCHIJF.

摘要

An optical information disk in which information can be written and read optically and which has a substrate plate which on at least one side has a recording layer which satisfies the formula TexSeySbzSq wherein x=55-85 at. %, y=13-30 at. % z=1-12 at. %, q=0-10 at. % and x+y+z+q=100. Suitable recording layers are Te60Se25Sb10S5 and Te75Se15Sb5S5.