Optical data carrier

摘要

Data storage device comprises a substrate and a chalcogenide data storage medium encapsulated in a dielectric, the medium being reversibly switchable between detectable states by an energy beam. The medium comprises a chalcogenide and a crosslinking agent. The dielectric is pref. a graded oxide, being stoichiometric adjacent the medium and suboxide away from it; the dielectric may be layered or continuous and is pref. GeOx.