New concept of phase-change optical recording free from the initialization process

Shuichiro Ogawa; Keigo Takeguchi; Isao Morimoto

doi:10.1117/12.327947

23 October 1998 New concept of phase-change optical recording free from the initialization process

Shuichiro Ogawa, Keigo Takeguchi, Isao Morimoto

Proceedings Volume 3401, Optical Data Storage '98; (1998) https://doi.org/10.1117/12.327947
Event: Optical Data Storage '98, 1998, Aspen, CO, United States

Abstract

In general, phase change media have to be initialized prior to recording. Initialization for phase change optical disks involves crystallization of as-deposited amorphous recording films. An initialization-free technology will lead to a low production cost, which is very important for commercializing phase change optical disks. A five-layered phase change optical disk, which has a thin metal layer between the substrate and the lower dielectric layer, has a good overwriting jitter at high linear velocity. We propose to use the higher reflective amorphous state of a five-layered phase change optical disk as the prerecording state without initialization. Our proposed new concept of phase change optical recording has some advantages, such as initialization- free, large signal amplitude of a header field, servo stability and high performance of overwriting jitter. Our proposed disk shows the performance to the 2.6 GBytes digital video disk-random access memory (DVD-RAM) disk.

Citation Download Citation

Shuichiro Ogawa, Keigo Takeguchi, and Isao Morimoto "New concept of phase-change optical recording free from the initialization process", Proc. SPIE 3401, Optical Data Storage '98, (23 October 1998); https://doi.org/10.1117/12.327947

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