Method and physical mechanism of initialization-free phase-change optical recording

A new method of initialization-free phase-change (PC) optical recording was proposed based on the crystallization kinetics of PC media. It was suggested that two special additional layers could be added to the disk to form a new disk structure for the initialization-free function. The physical mechanism of initialization-free PC optical recording was discussed. A model was proposed to explain the initialization-free method which combined the surface crystallization induced by the additional layer and the temperature change during the sputtering process. The simulation results of the initialization-free disk showed only a slight influence of the initialization-free structure on the writing/erasing properties of the PC recording layer. Experimental results verified the feasibility of the initialization-free method for PC optical recording