Abstract
An initialization-free Blu-ray disc was proposed as a candidate for multispeed blue laser recording and successfully fabricated. Experiment results of the initialization-free Blu-ray disc showed that it had a multispeed blue laser recording capability with speeds of 1 to 3x. The crystallization acceleration effect caused by additional layers and the rapid cooling caused by the initialization-free disc structure were suggested as the physical mechanism of multispeed recording in an initialization-free Blu-ray disc.