Magneto-optical recording medium comprising a specified substrat

Details Magneto-optical recording medium comprising a specified substrat Magneto-optical recording medium comprising a specified substrat

1994-12-27

1997-03-25

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428 643, 428 644, 428 647, 428212, 428216, 428336, 428412, 428694NF, 428694DE, 428694ST, 428694SG, 428900, 369 13, G11B 7007

Patent

active

056142870

ABSTRACT:
The reproduction characteristics, particularly the C/N ratio of a reproduced signal of an optical recording medium are deteriorated by an unevenness or deformation of an optical recording layer due to a convex or concave configuration of underlying guide means that are formed on the surface of the substrate. This deterioration can be prevented by disposing a leveling layer under the recording layer, but the leveling layer lowers the efficiency of the servo tracking. This lowering of servo tracking efficiency is prevented by insertion of a dielectric layer between the leveling layer and the guides.

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IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 3530-3532.
J. Appl. Phys., vol. 69, No. 8, Apr. 15, 1991, p. 4967.

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