| Autor: |
Natsuko Nobukuni, Masaaki Mizuno, Kenjirou Kiyono, Takao Hashizume, Michikazu Horie, Takashi Ohno |
| Rok vydání: |
2002 |
| Předmět: |
|
| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| Popis: |
A brief review is described on the material characterization and application of the Ge(Sb70Te30) + Sb alloy. A mechanism to enable fast crystalline growth is discussed based on its single phase, hexagonal crystalline structure. A competitive process of amorphization and re- crystallization during re-solidification is discussed with a simple simulation model, where it is suggested that continuous crystalline growth from the boundary of molten area assures no resolution limit in the formation of amorphous mark edge. Two important concepts of 'enhanced re- crystallization' and '2T-period divided pulse strategy' are proposed to fully utilize this class of material. The enhanced re-crystallization realizes precise amorphous mark size control, realizing high density multi-level recording. The 2T-period divided pulse strategy resolves a pre-mature amorphization issue due to an insufficient cooling period in the case of over 100MHz clock frequency for high speed recording. Finally, it is reported that 120 Mbps digital video recording and over 40GB multi-level recording on CD size single layer are feasible.© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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