Optical recording medium for short-wavelength of laser beam and

Details Optical recording medium for short-wavelength of laser beam and Optical recording medium for short-wavelength of laser beam and

1993-08-09

1995-12-05

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 76, 428192, 4284111, 428446, 428688, 428704, 428913, 346 761, 369283, B32B 302

Patent

active

054727588

ABSTRACT:
An optical recording medium of a data rewritable type includes: a substrate; a first transparent dielectric layer formed on the substrate, having a refractive index substantially equal to the refractive index of said substrate; a second transparent dielectric layer formed on the first dielectric layer, having a refractive index greater than that of said first dielectric layer and having its thickness being not greater than 80 nm; and further includes an optical recording layer formed on the second dielectric layer, so that said first and second dielectric layers and optical recording layer are laminated in this order on said substrate, where the total film thickness of the first and second dielectric layers is set to be not smaller than 90 nm.

REFERENCES:
patent: 4801499 (1989-01-01), Aoyama et al.
patent: 5098761 (1992-03-01), Watanabe et al.
patent: 5192626 (1993-03-01), Sekiya et al.
patent: 5232790 (1993-08-01), Arimune et al.

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