Bw. Yang et Hpd. Shieh, THE CHARACTERISTICS OF A DUAL-LAYER OPTICAL DISK WITH READ-ONLY AND ERASABLE FUNCTIONS, IEEE journal of selected topics in quantum electronics, 4(5), 1998, pp. 821-825
A dual-layer optical disk comprised of a read-only layer and a phase-c
hange layer was designed to perform the read-only and erasable dual-fu
nctionality in an optical disk. With the properly designed dual-layer
disk structure, 23 mW of write power was adequate to write data marks
on the erasable phase-change layer; simultaneously, equal magnitude of
sufficient radiofrequency readout signals could be obtained on both i
ts data layers. The analyzes of its recording characteristics demonstr
ated the feasibility of the dual-functional optical disk.