| 摘要 |
PROBLEM TO BE SOLVED: To provide a recording method by which a wide power margin can be secured and to provide a medium suitable for the method. SOLUTION: (1) The recording method is characterized in that when recording is performed on a phase transition type optical recording medium, the luminous waveform of a laser beam is formed in a recording pulse train consisting of a plurality of on-pulses and off-pulses succeeding thereto, recording frequencies are continuously changed from an inner periphery to an outer periphery or reversely thereto in correspondence with the recording radius position and the width of the plurality of on-pulses are controlled in accordance with the frequencies. (2) The medium is a phase transition type optical recording medium formed by laminating a first dielectric protective layer, a AInSbTeGe (A is Ag and/or Ga) phase change recording layer, a second dielectric protective layer, a SiC layer and a metal reflection layer which are laminated on a transparent substrate in this order and characterized in that the material of the first and the second dielectric protective layers consists of a mixture of ZnS and SiO2 and the metal reflection layer consists of Ag or Ag alloy. |
