<p>A rewritable optical information medium has a phase-change recording layer (3) on the basis of an alloy of Ge-Sb-Te-O, having the composition (GeaSbbTec)1-dOd, wherein: a+b+c=1 0.0001 a d a 0.035 The addition of oxygen considerably speeds up the crystallization rate of Ge-Sb-Te materials. Such a medium is suitable for high speed recording (i.e. at least eight times the CD-speed), such as for DVD-RAM and optical tape. The amount of oxygen in the recording layer (3) can be used to tune the crystallization rate to the desired value.</p>
申请公布号
EP0960419(A2)
申请公布日期
1999.12.01
申请号
EP19980954676
申请日期
1998.11.30
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
ZHOU, GUO-FU;JACOBS, BERNARDUS, A., J.;RIJPERS, JOHANNES, C., N.;BORG, HERMANUS, J.