Optical recording medium and optical recording/reproducing appar

Details Optical recording medium and optical recording/reproducing appar Optical recording medium and optical recording/reproducing appar

1995-09-25

1998-07-07

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 644, 428 646, 428913, 43027013, 4304951, 430945, 369100, 369121, 3692751, 369283, B32B 300

Patent

active

057765740

ABSTRACT:
An optical recording medium, which has a land and a groove on which a record mark is formed, comprises a transparent substrate, an inner protection layer formed on the substrate, a recording material layer formed on the inner protection layer and a reflection layer formed on the outer protection layer. The groove is formed to have a depth of .lambda./6 and the ratio of the thickness of the outer protection layer to the thickness of the recording material layer is set in a range between 0.8 and 1.2.

REFERENCES:
patent: 5075147 (1991-12-01), Usami
patent: 5147701 (1992-09-01), Furukawa
patent: 5348783 (1994-09-01), Ohno
patent: 5369480 (1994-11-01), Morishita

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