Method for intentionally degrading the content of an optical recording medium

摘要

The method involves scrolling a laser beam on physical marks, where the beam has power 30 percent lesser than power of reading blue laser that reads information recorded in a super-resolution on an optical disk. The recorded information is defined by a geometric configuration of the marks, and two dielectric layers (12, 16) and a stoichiometric indium or gallium antimonide layer (14) are superposed above the marks, where the layers (12, 16) are made of zinc sulphide and silicon dioxide compound. A transparent protection layer (18) is arranged above the superposition of the layers (12, 16).