積層構造を簡素化した光磁気ディスクの記録-再生特性および信頼性

抄録

The simple layer structure disk for magneto-optical recording was studied for applications of the erasable optical disk. Pt and Nb doped TbFeCo films had high corrosion resistance such as the dry corrosion, pitting corrosion, and wet corrosion. The recording film peels off from the PC substrate, as it was exposed in 60°C-95%RH for the simple sturucture disk to produce on the polycarbonate substrate (PC substrate). To increase the adhesive force, the TbFeCoPtNb film was protected from corrosions by the metal nitride layer such as TbFeCoPtNbN at the surface of the TbFeCoPtNb film. This nitride layer (5∼10 nm in thickness) was effective for increasing the corrosion resistance and bonding of the PC substrate. The carrier to noise ratio (C/N) was 43 dB at the recorded data at this disk. This disk has the high corrosion resistance such as dry corrosion, wet corrosion and pitting corrosion. The C/N was changed by the dry and wet corrosions, and the jitter width was changed by the pitting corrosion. These results show that the simple layer structure disk is suitable as the erasable optical disk because of its high reliability.