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    • 8. 发明授权
    • Optical recording medium
    • 光记录介质
    • US5688574A
    • 1997-11-18
    • US616011
    • 1996-03-14
    • Reiji TamuraYoshihiro IkariToshiaki TaiiNorio Ota
    • Reiji TamuraYoshihiro IkariToshiaki TaiiNorio Ota
    • G11B7/24G11B7/243G11B7/258G11B11/105B32B3/00
    • G11B7/258G11B7/24G11B7/243G11B11/1051G11B11/10586G11B2007/24306G11B2007/24312G11B2007/24314G11B2007/24316G11B2007/2432G11B7/2542G11B7/2595Y10S428/913Y10S430/146Y10T428/21Y10T428/31678
    • Disclosed is a phase-change optical recording medium which has a reflectance and a signal modulation conformed to the CD standard, and which is usable for recording at the same linear velocity as the reproducing velocity specified in the CD standard. The phase-change optical recording medium comprises a metallic layer, a first protective layer, a recording layer, a second protective layer, and a reflecting layer on a substrate, in which recording is performed through change from a crystalline state to an amorphous state in the recording layer. The recording layer comprises a recording material of a Ge--Te--Sb--Se system, and the recording layer has an average composition in a direction of thickness which satisfies the following relations as represented by atomic %: Ge.gtoreq.40%, and Sb+Se.ltoreq.25% The recording medium has a reflectance of not less than 70% with respect to a light beam for reproduction when the recording layer is in one of the crystalline state and the amorphous state, and the recording medium has a reflectance of less than 40% when the recording layer is in the other state. An AuCo alloy is used as the metallic layer.
    • 公开了一种相变光学记录介质,其具有符合CD标准的反射率和信号调制,并且可用于以与CD标准中规定的再现速度相同的线速度进行记录。 相变光记录介质包括在基板上的金属层,第一保护层,记录层,第二保护层和反射层,其中通过从结晶状态转变为非晶状态进行记录 录音层。 记录层包括Ge-Te-Sb-Se系的记录材料,记录层的厚度方向的平均组成满足下列关系:原子%Ge = 40%,Ge Sb + Se <25%当记录层处于结晶状态和非晶状态之一时,记录介质相对于用于再现的光束具有不小于70%的反射率,并且记录介质具有 当记录层处于另一状态时,反射率小于40%。 使用AuCo合金作为金属层。