| 发明名称 |
OPTICAL INFORMATION RECORDING/REPRODUCING/ERASING MEMBER AND OPTICAL DISK |
| 摘要 |
PURPOSE:To obtain a member that can perform the crystallization with a short circle spot by choosing a specific recording thin film and forming this film on a substrate. CONSTITUTION:A mixture of GeTe and Ge (mol ratio X set as 0<X<0.3) is used as a thin film material and formed on a substrate. A GeTe alloy has a high melting point and is turned into a thin film for acquisition of an amorphous film. This film is irradiated by the laser light and heated and cooled to secure the recording actions for acquisition of an amorphous state and the crystallization. Such a composition matter has a high crystallizing speed and is crystallized with a short laser spot or circle spot. On the other hand, said composition matter receives the limitation of the cooling speed at formation of an amorphous mark owing to the high crystallizing speed. Therefore the crystallizing speed is controlled by mixing Ge having a higher melting point. Thus it is possible to suppress the change of sensitivity due to the diameters of crystallized grains in the recording and erasing cycles and to improve the cycle characteristics. |
| 申请公布号 |
JPH025237(A) |
申请公布日期 |
1990.01.10 |
| 申请号 |
JP19880153928 |
申请日期 |
1988.06.22 |
| 申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
OTA TAKEO;FURUKAWA SHIGEAKI;AKIYAMA TETSUYA;ISOMURA HIDEMI;UCHIDA MASAMI |
| 分类号 |
B41M5/26;G11B7/24;G11B7/243 |
主分类号 |
B41M5/26 |
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