| 摘要 |
A phase modulation type optical recording medium has at least one layer of recording film 4 and at least one layer of metal film 3 on a substrate 1 having recessed portions formed therein, wherein one or more layers constituting the recording film include organic material that decomposes upon absorption of laser light to change its refractive index, and width of the recessed portions 2 is set to 0.10 mu m SIMILAR 0.21 mu m, thereby providing an optical recording medium of write once type with high recording density capable of high reproduction output. <IMAGE> |
