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    • 5. 发明授权
    • Rewritable optical information medium
    • 可重写光信息媒体
    • US06735165B1
    • 2004-05-11
    • US09332240
    • 1999-06-14
    • Guo-Fu ZhouRoel Van Woudenberg
    • Guo-Fu ZhouRoel Van Woudenberg
    • G11B724
    • G11B7/24G11B7/006
    • A description is given of a disc-shaped rewritable optical information medium having an IPIM stack (2) comprising a phase-change recording layer (4) sandwiched between two dielectric layers (3,5), and a metal mirror layer (6). The thickness of the recording layer (4) increases gradually with increasing radius r. As a result, the complete erasure time CET of recorded marks decreases from the inner radius ri to the outer radius ro. Therefore, at a point closer to the outer radius marks can be recorded at a higher linear speed than at a point closer to the inner radius. This effect ensures that the recording medium can be used for recording at a constant angular velocity (CAV).
    • 给出了具有IPIM堆叠(2)的盘状可重写光学信息介质的描述,所述IPIM堆叠(2)包括夹在两个电介质层(3,5)和金属镜面层(6)之间的相变记录层(4)。 记录层(4)的厚度随半径r的增加而逐渐增加。 结果,记录标记的完全擦除时间CET从内半径ri减小到外半径ro。 因此,在更接近外半径标记的点可以以比在更靠近内半径的点更高的线速度记录。 该效果确保记录介质可以用于以恒定角速度(CAV)进行记录。