Magneto-optical disc with intermediate film layer between a reco

Details Magneto-optical disc with intermediate film layer between a reco Magneto-optical disc with intermediate film layer between a reco

1994-10-06

1996-11-19

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692753, 369 13, 369288, 360 59, 360112, 365122, 428694SC, 428694MM, 428694EC, 428694NF, G11B 726, G11B 1100

Patent

active

055770207

ABSTRACT:
A magneto-optical disc is fabricated by forming a first dielectric film, a recording film of a rare earth element-transition element alloy, and a second dielectric film on a transparent substrate in the described order and further forming an intermediate film between the recording film and the second dielectric film. The second dielectric film contains at least one metal element and nitrogen. By depositing Ti, Cr or Nb to form an intermediate film of 1-28 .ANG. thick, the disc is improved in magnetic field sensitivity and reliability. By depositing Co or Ni to form an intermediate film of 1-18 .ANG. thick, the disc is improved in magnetic field sensitivity and reproduction stability.

REFERENCES:
patent: 5361248 (1994-11-01), Hatwar et al.
patent: 5398219 (1995-03-01), Itoh et al.
patent: 5400307 (1995-03-01), Ochiai et al.

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