Magneto-optical recording medium having dielectric layers with d

Details Magneto-optical recording medium having dielectric layers with d Magneto-optical recording medium having dielectric layers with d

1997-04-07

1999-06-22

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694DE, 428694RL, 428694XS, 428694NF, 428900, 369 13, G11B 566

Patent

active

059141980

ABSTRACT:
In a magneto-optical recording medium which comprises a transparent substrate, a first dielectric film, a magnetic film, a second dielectric film and a metal reflective film, formed successively one upon another, Kerr rotation angle can be increased without lowering the reflectivity by setting the thickness of the first dielectric film to 120-220% of a minimum film thickness among film thicknesses showing a minimum reflectivity and setting the thickness of the second dielectric film to 80-120% of a film thickness showing a maximum Kerr rotation angle and furthermore by making the refractive index of the first dielectric film lower than that of the second dielectric film.

REFERENCES:
patent: 4466035 (1984-08-01), Connell et al.
patent: 4717628 (1988-01-01), Takahashi et al.
patent: 4786559 (1988-11-01), Murakami et al.
patent: 4838962 (1989-06-01), Takayama et al.
patent: 5175715 (1992-12-01), Moon
Maeno et al., "Magnetooptical Memory Using BaTiON protective films", Oct. 1990, J. Appl. Phys. 68 (8), p. 4325. Feb. 6, 1988, Japan. May 31, 1988, Japan. 22, 1982, Japan. Aug. 23, 1988, Japan. May 31, 1988, Japan.

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