OPTICAL RECORDING MEDIUM

摘要: PURPOSE:To enhance repeating properties of recording/erasure and high speed erasing capacity by a method wherein recording layer is constituted aggregate atomic lumps respective atoms are bonded chemical bond not or weakly even if bonded. CONSTITUTION:The material medium composed regularly arranged in its crystal state. The each lump such as covalent an ion regularly. There no between there bond, said weak one like Van der Waals bond. As the having these properties, for example, Sb2Te3 Bi2Te3 designated. This has property suitable rewriting medium. That is, judging from level, it may be regarded that considerable spaces present particles (atomic lumps). Therefore, when this melted laser heating quenched to made amorphous, volumetric expansion accompanied phase change absorbed gaps film and, therefore, can small whole. irreversible deformation generated. At time crystallization, hard generate force