Title :
High-transfer-rate 4.7-GB DVD-RAM
Author :
Miyamoto, Makoto ; Ushiyama, Junko ; Umezawa, Kazuyo ; Kashiwakura, Akira ; Tamura, Reiji
Author_Institution :
Inf. Storage Res. Dept., Hitachi Ltd., Kokubunji, Japan
Abstract :
Showed the feasibility of 4.7-GB DVD-RAM media for 5× recording. In order to maintain compatibility with current 2× drives, we reduced jitter in both 2× and 5× recording. The most important design concept is to control the crystal growth velocity and crystal nucleation frequency: the former should be reduced and the latter increased. To control these values, we prepared a medium having a Ge-Sb-Te recording film and a nucleation promoting film. It showed jitter lower than 10% in both 2× and 5× recording.
Keywords :
antimony alloys; digital versatile discs; germanium alloys; jitter; nucleation; random-access storage; tellurium alloys; 4.7 GB; DVD-RAM; Ge-Sb-Te; GeSbTe; crystal growth velocity; crystal nucleation frequency; jitter; nucleation promoting film; transfer rate; Amorphous materials; Crystallization; Frequency; High speed optical techniques; Interference; Jitter; Optical films; Optical recording; Research and development; Substrates;
Conference_Titel :
Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on
Print_ISBN :
0-7803-7379-0
DOI :
10.1109/OMODS.2002.1028685
