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 (0.55μm-0.6 μm) and making small marks (0.40μm-0.62μm) 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 10⁴ cycles is observed. The cross erase after 10¹ overwriting cycles resulted in less than 1% of jitter increase from the initial value.