Optical recording medium with write-once and rewritable properties

摘要

The present invention relates to a write-once optical recording medium (1), which in addition to the write-once properties also has rewritable properties.

According to the invention, this object is achieved by an optical recording medium (1) with a recording layer (4) having at least a first recording sublayer (R1) and a second recording sublayer (R2) for recording information marks (3) by alloying material of the at least first and second recording layers (R1, R2), wherein the materials of the at least first and second recording sublayers (R1, R2) are chosen such that the alloyed material is a phase-change material adapted for recording additional data as phase changes of the alloyed material.