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 mu m-0.6 mu m) and making small marks (0.40 mu m-0.62 mu m) 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 alter 10(4) overwriting cycles resulted in less than 1% of jitter increase from the initial value.