THERMAL RESPONSE DESIGN FOR HIGH RECORDING DENSITY MAGNETOOPTICAL MEDIA

For the light intensity modulation recording process of magnetooptical (MO) disks, we have investigated the thermal response of the recordin g layer for high linear density recording. By means of a computer simu lation, we found that the thermal response is improved by using a 6-la yer structure which has an extra thermal flow control layer composed o f a thermal buffer and an extra heat sink layer, unlike the convention al 4-layer structure. The thermal response improvement was also confir med experimentally. It is possible to optimize both the thermal respon se and the optical requirements separately using our 6-layer structure which will be useful when designing higher density recording MO disks .