Double-sided magneto-optical media for a multi-disk storage devi

Details Double-sided magneto-optical media for a multi-disk storage devi Double-sided magneto-optical media for a multi-disk storage devi

1992-03-06

1993-04-13

Porta, David P.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692752, 369277, 369283, 369286, 428694, 428900, G11B 724

Patent

active

052028801

ABSTRACT:
A low-profile magneto-optical media for double sided recording of information. The media comprises a single polycarbonate substrate having a relief in the form of tracking grooves or sampled-servo pits on each side surface thereof. Formed on each relief surface are thin-film active layers including a reflective layer, a transparent dielectric layer, a magneto-optical recording layer, and a transparent protective layer. The reflective layer is preferably formed of aluminum alloy. The dielectric layer is preferably formed of aluminum nitride or silicon nitride. The recording layer is formed of an amorphous vertically oriented magnetic material, preferably a rare-earth transition-metal alloy, for example, Tb-Fe-Co. The protective outer layer is formed of a transparent anti-corrosive material specifically compatibly with an air-bearing, low-flying, read/write head, preferably silicon nitride.

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