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    • 5. 发明授权
    • Optical information recording medium
    • 光信息记录介质
    • US5410534A
    • 1995-04-25
    • US77374
    • 1993-06-17
    • Ken'ichi NagataEiji OhnoNobuo AkahiraKen'ichi NishiuchiNoboru Yamada
    • Ken'ichi NagataEiji OhnoNobuo AkahiraKen'ichi NishiuchiNoboru Yamada
    • G11B7/005G11B7/24G11B3/70
    • G11B7/24G11B7/0051
    • In an optical recording medium having concave and convex type signal pits formed on a substrate surface, a reflection layer is formed on the signal pits in such a manner that a reflection index of an interior of the signal pits is higher than a reflection index at a periphery of the signal pits with respect to a given reproduction laser beam wavelength. In an optical recording medium having a phase change recording layer which reversibly changes optical states upon application of laser energy, a structural phase difference between a reflection beam of non-recorded regions and a reflection beam of recorded regions of the optical recording medium with respect to the wavelength of a reproduction laser beam is in a range of (0.5-1.5)+2 n.pi. radians, where n is an integer. The phase change recording layer has principle components of Ge-Sb-Te or Sb-Se.
    • 在形成在基板表面上的具有凹凸型信号凹坑的光记录介质中,在信号凹坑上形成反射层,使得信号凹坑内部的反射指数高于信号凹坑内部的反射指数 信号的周边相对于给定的再现激光束波长凹坑。 在具有在施加激光能量时可逆地改变光学状态的相变记录层的光学记录介质中,非记录区域的反射光束和光学记录介质的记录区域的反射光束之间的结构相位差相对于 再现激光束的波长在(0.5-1.5)+2n pi弧度的范围内,其中n是整数。 相变记录层具有Ge-Sb-Te或Sb-Se的主要成分。