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2. 发明公开

EP0237181A1 Information recording medium and information write/read method using the same 失效
标题翻译：信息记录写入介质和方法/从该载体读取信息。
公开(公告)号：EP0237181A1
公开(公告)日：1987-09-16
申请号：EP87301080.5
申请日：1987-02-06
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Ikegawa, Sumio c/o Patent Division , Komatsu, Shuichi c/o Patent Division , Arai, Shinji c/o Patent Division , Ashida, Sumio c/o Patent Division , Yasuda, Nobuaki c/o Patent Division
IPC分类号： G11B7/24 , G11C13/04
CPC分类号： G11B7/257 , G11B7/00557 , G11B7/243 , G11B7/252 , G11B7/2531 , G11B7/2533 , G11B7/254 , G11B2007/24308 , G11B2007/24312 , G11B2007/2571 , G11B2007/25713
摘要： Disclosed is a rewritable information recording medium which has a recording layer (2) containing a Group I transition element and a Group IV typical element of the Periodic Table as two principal element and having the following characteristics, and a support substrate (1) for physically supporting the recording layer (2), and an information-write, -read, and -erase method, using this recording medium. When the recording layer (2) is immediately cooled after it is heated up to near a eutetic temperature of the two principal elements, two metastable phases having different energy levels appear. A state in the first metastable phase of the higher energy level has a reflectivity sufficiently higher than that of a state of a mixed phase including the second metastable phase of the lower energy level, or that of the equilibrium state. The state in the first metastable phase can be obtained by heating a recording layer (2) in another state by light beam irradiation. A portion (3) in the first metastable state is cooled after it is heated to a temperature lower than that for obtaining the first metastable phase, so that it can be converted to a state of the low reflectivity, i.e., a state of a mixed phase including the second metastable phase or to the equilibrium state. Since the recording layer can be reversibly altered between states of high and low reflectivities upon light beam irradiation, information can be erasably written. A write or erase-operation can be performed in a short period of time dur to the relationship between the crystal structures of the two states. Furthermore, the medium of this invention has no toxicity in terms of its constituents, and has good environmental resistance.
摘要翻译：本发明公开了可重写信息记录包含I族过渡元素和周期表中作为两个主要元件的IV族典型元素并具有以下特征，介质，其具有记录层（2）和支撑衬底（1）物理地支撑记录层（2），并在信息写入， - 读取，和-erase方法，使用该记录介质。当它被加热到接近的两个主元件的eutetic温度后的记录层（2）被立即冷却，具有不同energylevels 2个亚稳相出现。在较高的能量电平的第一亚稳相A状态具有足够的反射率比的混合相的，包括低能量电平的第二亚稳相的状态下的更高，或做了平衡状态。在第一亚稳相的状态可通过光束照射在加热另一状态的记录层（2）来获得。在第一亚稳状态的部分（3）被冷却后，被加热至高于用于获得第一亚稳相的温度下，所以也可将其转化为低反射率，即，混合的状态的状态相包括第二亚稳相或到平衡状态。由于记录层可以可逆地高和低反射率的状态之间在光照射改变的，可以将信息写入可擦。一写入或擦除操作可以在时间DUR的到两个状态的晶体结构之间的关系的短时间内进行。进一步，本发明的介质具有在其组分而言没有毒性，并具有良好的耐环境性能。

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