公开(公告)号：USRE42222E1

公开(公告)日：2011-03-15

申请号：US10389615

申请日：2003-03-14

申请人： Norboru Yamada ,  Kunio Kimura ,  Masatoshi Takao ,  Susumu Sanai

发明人： Norboru Yamada ,  Kunio Kimura ,  Masatoshi Takao ,  Susumu Sanai

IPC分类号： G11B7/24

CPC分类号： G11B7/243 ,  G11B7/00454 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/257 ,  G11B7/266 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10S430/146

摘要： Phase-change type, reversible optical information recording medium, being possible for recording, reproducing, erasing, and rewriting of information, by use of a laser beam. This invention, consists of recording thin film of ternary elements, for example, containing Ge, Te, Sb/or Bi or quaternary elements containing the fourth element of Se with which a part of Te is replaced, which is established on such surface—flat substrates as glass or plastics. In this case, the component ratio of Te and Se is selected not to be excess for other elements, such as Ge, Sb/or Bi so as to be fixed as stable compounds of stoichiometric compositions of GeTe, Sb2Te3/or Bi2Te3, or GeSe, Sb2Se3/Bi2Se3 when crystallized. Strictly speaking, a concentration of each component is selected to have proper ratio of the number of atoms each other so as to represent whole composition as the sum of each component. By this treatment, it is possible to have high crystallization speed and long cyclability of recording/erasing. The effect of Se is to increase the viscosity of the system and to make easily to obtain amorphous state; and moreover, by selecting of proper amount diplaced with Te, it is possible to obtain the composition of recoding film superior in both characteristics of recording (amorphization) and erasing (crystallization).

摘要翻译： 相变型，可逆光信息记录介质，可以通过使用激光束进行信息的记录，再现，擦除和重写。 本发明包括记录三元元素的薄膜，例如包含Ge，Te，Sb /或Bi或含有Se的第四元素的四元元素，其中Te的一部分被替换，其形成在这样的表面平坦 基材为玻璃或塑料。 在这种情况下，对于Ge，Sb /或Bi等其他元素，Te和Se的成分比被选择为不过量，以固定为GeTe，Sb 2 Te 3 /或Bi 2 Te 3或GeSe的化学计量组成的稳定化合物 ，Sb2Se3 / Bi2Se3结晶。 严格地说，选择每个组分的浓度以使原子数彼此具有适当的比例，以表示作为各组分的总和的全部组成。 通过这种处理，可以具有高结晶速度和长的记录/擦除循环性。 Se的作用是提高系统的粘度，使其易于获得无定形状态; 此外，通过选择适当量的Te，可以获得在记录（非晶化）和擦除（结晶）两个特性方面优异的记录膜的组成。