Optical recording medium and production thereof

Details Optical recording medium and production thereof Optical recording medium and production thereof

1995-04-05

1996-01-23

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 644, 428 647, 428 648, 428913, 430945, 43027017, 43027015, 43027016, 369272, 369283, 369288, B32B 300

Patent

active

054863961

ABSTRACT:
An optical recording medium comprises a substrate, a recording layer overlying the substrate in a manner such that it is not present at the inner and outer peripheral portions of the substrate, a metal reflective layer overlying the recording layer in a manner such that the inner periphery of the metal reflective layer is coterminous with that of the recording layer while the outer peripheral portion of the reflective layer extends over the outer perphery of the recording layer, and a protective layer wholly covering the metal reflective layer extending over the recording layer, both at the inner and outer peripheral portions. The optical recording medium exhibits an excellent adhesion strength of the protective layer even when stood under high humidity and high temperature conditions for a long period of time, and the protective layer is not peeled off when subjected to a tape peeling test.

REFERENCES:
patent: 4710418 (1987-12-01), Takano et al.
patent: 4933222 (1990-06-01), Masuda
patent: 4981743 (1991-01-01), Ho
patent: 4983505 (1991-01-01), Hoguchi et al.
patent: 5313452 (1994-05-01), Usami
patent: 5382460 (1995-01-01), Onagi
Japanese Abstract No. JP 2183442, Jul. 18, 1990.
Japanese Abstract No. 60-243825, Dec. 3, 1985.
Japanese Abstract No. 61-29431, Feb. 10, 1986.

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