Optical recording medium and method of preparing same

Details Optical recording medium and method of preparing same Optical recording medium and method of preparing same

1992-03-19

2000-06-20

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 647, 428 651, 428 652, 428698, 428900, 360131, 360134, 360135, 365122, 369 13, 369288, 3461351, 346 76L, 20419226, 20419227, G11B 566

Patent

active

060775858

ABSTRACT:
An optical recording medium having at least one aluminum nitride and silicon nitride composite dielectric layer is provided. The amount of aluminum nitride in the dielectric layer, x, is more than zero and less than or equal to about 95 mol %. The amount of silicon nitride in the layer is represented as (100-x) and is equal to or greater than about 5 and less than 100 mol %. The refractive index of the composite dielectric layer is between about 1.70 and 2.15. The composite dielectric layer is sandwiched between a transparent support such as a plastic transparent support and an optical recording layer adapted to be irradiated by laser light in order to read, write or erase information in order to protect the recording layer.

REFERENCES:
patent: 4390600 (1983-06-01), Ohta et al.
patent: 4610912 (1986-09-01), Takahashi et al.
patent: 4658388 (1987-04-01), Ishiwatari et al.
patent: 4680742 (1987-07-01), Yamada et al.
Cuomo, "Antireflection Coatings for the Enhancement of Magneto-Optic Effects in Amorphous Rare-Earth Transition Metal Alloys" IBM TDB V51. 16, No. 5, Oct. 1973, p. 1442.

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