| 摘要 |
<p>A description is given of a rewritable optical information medium having an IPIAIM stack (2) comprising a phase-change recording layer (4) sandwiched between two dielectric layers (3, 5), a light-absorbing layer (6) of a material like Si, Ge, Mo, or W, a third dielectric layer (7), and a metal mirror layer (8). The light-absorbing layer (6) reduces the difference in light absorption between the amorphous state and the crystalline state to a minimum, thus reducing the recording mark distortion. The presence of the light-absorbing layer in this position ensures that the optical phase difference between the amorphous and the crystalline state is almost zero, making the medium suitable for land-groove recording.</p> |
