公开(公告)号：US4839861A

公开(公告)日：1989-06-13

申请号：US012074

申请日：1987-02-06

Applicant: Sumio Ikegawa ,  Shuichi Komatsu ,  Shinji Arai ,  Sumio Ashida ,  Nobuaki Yasuda

Inventor： Sumio Ikegawa ,  Shuichi Komatsu ,  Shinji Arai ,  Sumio Ashida ,  Nobuaki Yasuda

IPC: G11B7/00 ,  B41M5/26 ,  G11B7/0055 ,  G11B7/243 ,  G11B7/30

CPC classification number: G11B7/257 ,  G11B7/00557 ,  G11B7/243 ,  G11B2007/24308 ,  G11B2007/24312 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B7/252 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/254

Abstract: A rewritable information recording medium which has a recording layer containing a Group I transition element and a Group IV representative elements of the Periodic Table as two principal element and a support substrate for physically supporting the recording layer, and an information-write, -read, and erase method using this recording medium. When the recording layer is immediately cooled after it is heated up to near a eutectic 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 in another state by light beam irradiation. A portion 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.

Abstract translation: 一种可重写信息记录介质，其具有包含作为两个主要元件的元素周期表的第I族过渡元素和IV族代表元素的记录层和用于物理支撑记录层的支撑基板，以及信息写入的读取记录介质， 和使用该记录介质的擦除方法。 当记录层在被加热到两个主要元素的共晶温度附近之后立即冷却时，出现具有不同能级的两个亚稳相。 较高能量级的第一亚稳态中的状态具有足够高于包括较低能量级的第二亚稳态或平衡态的混合相的状态的反射率的反射率。 可以通过光束照射在另一状态下加热记录层来获得第一亚稳相中的状态。 第一亚稳态中的一部分在被加热到低于用于获得第一亚稳相的温度以下的温度下被冷却，使得其可以转化为低反射率的状态，即包括 第二亚稳态或平衡态。