The characteristics of a dual-layer optical disk with read-only anderasable functions

摘要

A dual-layer optical disk comprised of a read only layer and anphase-change layer was designed to perform the read-only and erasablendual-functionality in an optical disk. With the properly designedndual-layer disk structure, 23 mW of write power was adequate to writendata marks on the erasable phase-change layer; simultaneously, equalnmagnitude of sufficient radiofrequency readout signals could be obtainednon both its data layers. The analyzes of its recording characteristicsndemonstrated the feasibility of the dual-functional optical disk