Abstract
Rewritable compact discs (CDs) using magnetooptical (MO) materials have been developed. The disks were prepared by depositing Si3N4, TbFeCo alloy, Si3N4 and Al films on polycarbonate substrates utilizing a rnagnetron sputtering system. Sputter etching was carried out for Si3N4, under-layer of magnetic layer, with the very interesting effect of improvement of the external magnetic field sensitivity. Stabilities on write power and magnetic field sensitivity for the above MO disks were investigated. In this paper, the relation between recording sensitivity stability and the sputter etching effect is reported.
