Optical data storage medium and use of such a medium

Details Optical data storage medium and use of such a medium Optical data storage medium and use of such a medium

2007-08-21

2007-08-21

Chen, Tianjie (Department: 2627)

Dynamic optical information storage or retrieval

Optical storage medium structure

Reexamination Certificate

active

10479556

ABSTRACT:
The optical data storage medium (20) has a substrate (1) with a surface area having tracks (4) of marks representing stored information. The information is readable by means of a scanning radiation beam (10). A reflective layer (2) is present, reflecting the radiation beam (10). The medium has a radiation beam (10) reflection larger than 50%. The reflective layer (2) comprises a compound of the formula Al100-y,Xy, in which formula Al is aluminum and X is an element selected from the group of Ge and Si. The letter y is the atomic fraction of X in at. %. The value of y is in the range 5<y<35. The reflective layer (2) has a radiation beam absorption, which enables controlled ablative recording or solid-phase change recording of an identification mark (6, 6′).

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