Optical recording medium and production method thereof

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

1988-09-19

1990-03-13

Robinson, Ellis P.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428412, 428421, 428422, 428413, 4284735, 428458, 428461, 428480, 428493, 428913, 428333, 430945, 346 76L, 3461351, 369288, 428337, B32B 302

Patent

active

049082507

ABSTRACT:
In an optical recording medium, an under layer is formed between an even pattern of a substrate and a recording layer, and said under layer is made of a high polymeric material which can be melted, sublimated, or decomposed at a lower temperature than the melting point, the sublimating point, or the decomposing temperature of said recording layer. Accordingly, said under layer can relax the thermal shock transferred from said substrate into said recording layer, and the deformation of said substrate can be prevented, even through a laser beam for playback is repeatedly radiated onto said recording layer, and said optical recording medium has a larger recording sensitivity than the recording sensitivity of an optical recording disc of a prior art.

REFERENCES:
patent: 4268840 (1981-05-01), Schank et al.
patent: 4343862 (1982-08-01), Yasuda et al.
patent: 4451914 (1984-05-01), LaBudde et al.
patent: 4451915 (1984-05-01), LaBudde et al.
patent: 4551828 (1985-11-01), Chung
patent: 4554562 (1985-11-01), Afzali-Ardakani et al.
patent: 4555472 (1985-11-01), Katagiri et al.
patent: 4565772 (1986-01-01), Takeoka et al.
patent: 4592939 (1986-06-01), Temple et al.

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