A phase change optical disk having a reflectance relation of Rc<Ra and is adapted such that high recording characteristic can be obtained starting at a first recording time even when a recording operation is carried out without conducting an initialization process. For this purpose, a multiple reflection...http://www.google.de/patents/US6335069?utm_source=gb-gplus-sharePatent US6335069 - Phase-changeable optical recording medium, method of manufacturing the same, and method of recording information on the same
