Thermally Optimum Structure for Overwriting Cyclability and Cross-Erase Characteristics

As two key restrictions for increasing the recording capacity, cross-erase and jitter from narrowing track pitch (0.55 µm–0.6 µm) and making small marks (0.40 µm–0.62 µm) are presented using a thermally optimum phase-change optical disk with the ability of thermal endurance and high thermal conduction as well as minimum crosstalk and maximum groove signals. For overwriting jitter no increase after 10 4 cycles is observed. The cross erase after 10 4 overwriting cycles resulted in less than 1% of jitter increase from the initial value.