Magneto-optical disk having variable thickness recording layer b

Details Magneto-optical disk having variable thickness recording layer b Magneto-optical disk having variable thickness recording layer b

1996-06-28

1998-05-12

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

3692751, G11B 1100, G11B 724

Patent

active

057516707

ABSTRACT:
A magneto-optical disc includes a disc-shaped transparent substrate, a recording layer formed on the substrate for extending from an inner diameter to nearly an outer most diameter, and an outer peripheral portion of the recording layer having a thickness thinner than a thickness of an inner portion of the recording layer. The inner portion has a reflectance value to a recording and playback light beam having a wavelength .lambda.. The portion having such reflectance value is extended to the peripheral portion so that a recording layer is extended to the peripheral portion.

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