Abstract
Recent magneto-optical ( MO ) disk systems adopt mark length modulation technique in order to improve linear recording density, in which the mark edges have to be recorded more precisely. In light intensity modulation recording MO system such as ISO standardized format, however, recorded marks are deformed because of thermal interference in write process. One of the most effective method to prevent the thermal interference is to use write compensation technique with elaborated write pulse patterns.[1] From this point of view, the thermal response design of recording layer structure must be serious subject in next generation MO disk media. We have investigated new layer structure suitable for higher density format. By means of a computer simulation, it is shown that the thermal response is improved by using a 6 recording layer structure, which has an extra thermal flow control layer. The improvement of recording characteristics is also confirmed experimentally.
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