High-transfer-rate DVD-RAM

摘要

We showed the feasibility of 4.7-GBDVD-RAM media for 5X recording. In order to maintain compatibility with current 2X drives, we reduced jitter in both 2X and 5X 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 9% in both 2X and 5X recording.