| 摘要 |
PURPOSE:To improve stability for recording and erasing without decreasing the recording sensitivity and to extend repitition times for recording and erasing by forming intermediate layers on both sides or one side of a recording layer in such a manner that the intermediate layer is adjacent to the recording layer. CONSTITUTION:The optical recording medium is constituted by successively laminating a protective layer 2, intermediate layer 3, recording layer 4, intermediate layer 5 and protective layer 6 and reflecting layer 7 on a transparent substrate 1. The substrate 1 is a quartz glass, and the layer 2, 6 consist of ZnS containing Y2O3, (10mol% Y2O3), and the layers 3, 5 consists of Y2O3, the layer 7 consists of Al. The repetition times for recording and erasing of the medium is about 1X10<6> times if intermediate layers 3, 5 are not formed, but by introducing the layers 3, 5, the reptition times can be increased to 5X10<6> to 1X10<7>. |
