Optical information record carrier and the method of producing t

Details Optical information record carrier and the method of producing t Optical information record carrier and the method of producing t

1989-07-20

1992-06-30

Ro, Bentsu

Dynamic information storage or retrieval

Storage medium structure

Layered

369272, 369286, G11B 7013

Patent

active

051269961

ABSTRACT:
An optical information record carrier (optical disk, conventionally) has multiple reflective surfaces, each carrying separate information and each readable by an optical beam directed from the same side of the record carrier. The top most reflective surface reflects light of a first waveband and passes light of a second waveband. The next top most reflective layer reflects light within at least part of the second waveband. The record carrier is formed by producing a first reflective layer having a first pit pattern in the surface of a transparent substrate, pressing said first subtrate/layer combination to a transparent stamper having a second pit pattern, with a radiation hardening liquid resin therebetween, irradiating the resin by applying radiation to said resin through said stamper, peeling off said stamper, applying a second reflective layer to said hardened resin surface opposite the surface in contact with said first reflective layer, and applying a protective layer to said second reflective layer.

REFERENCES:
patent: 4179532 (1979-12-01), Soeding
patent: 4219704 (1980-08-01), Russell
patent: 4515877 (1985-05-01), Barzynski et al.
patent: 4905215 (1990-02-01), Hattori et al.
patent: 4908813 (1990-03-01), Ojima et al.
patent: 4956243 (1990-09-01), Miyake et al.
patent: 4965166 (1990-10-01), Hosoi et al.
patent: 4977064 (1990-12-01), Sukawa et al.

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