Optical recording disk capable of suppressing bimetallic effects

Details Optical recording disk capable of suppressing bimetallic effects Optical recording disk capable of suppressing bimetallic effects

1998-11-09

2000-10-03

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369283, 428 644, G11B 724

Patent

active

06128274&

ABSTRACT:
An optical disk of the present invention includes a transparent dielectric film formed on a light incident side of the disk on an opposite side of an optical recording film so as to sandwich the transparent substrate therebetween, for suppressing bimetallic effects caused by a difference in thermal expansion between an optical recording film formed on an optical recording surface and the transparent substrate, whereby changes in tilt against temperature changes can be suppressed. Further, by an optimal selection of a reflectance of the transparent dielectric film, unwanted reflection due to multi-interference can be reduced at the same time.

REFERENCES:
patent: 4782477 (1988-11-01), Ichihara et al.
patent: 4845000 (1989-07-01), Takeoka et al.
patent: 5665520 (1997-09-01), Yoshioka et al.
patent: 5972461 (1999-10-01), Sandstrom

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