Stability of phase-change optical disks produced by a pass-through type sputtering system

Abstract

Many types of rewritable optical disks have been proposed and studied. Some of them are currently used for computer data storage and audio/video signal recording. Of these types, a phase-change rewritable (PCR) type shows great promise as a future optical recording media. It can be easily overwritten, and the carrier-to-noise ratio (CNR) is high over wide range of wavelengths, from 400nm to 900nm.1) A phase-change media shows high performance characteristics, but it has not been shown that a high performance phase-change media can be mass-produced, as MO media is.