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

1993-03-30

1995-07-11

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428457, 428913, 430270, 430945, 3461351, 347264, B32B 300

Patent

active

054319757

ABSTRACT:
An optical recording medium comprises a transparent substrate, an inner protection layer, a recording material layer, an outer protection layer, and a reflection layer, which are laminated in this order. In an in-groove recording mode, the ratio of the thickness of the recording material layer to the thickness of the outer protection layer is in a range between 0.52 and 0.95. In an on-land recording mode, the ratio of the thickness of the recording material layer to the thickness of the outer protection layer is in a range between 0.32 and 0.6.

REFERENCES:
patent: 5075147 (1991-12-01), Usami
patent: 5147701 (1992-09-01), Furukawa
Japanese Journal of Applied Physics Part 1, vol. 31, No. 2b, Feb. 1992, Tomio Yoshida, et al., "Self-Sharpening Effect of Phase Change Erasable Media", pp. 476-481.
Jpn. J. Appl. Phys. vol. 31 (1992) pp. 653-658 Part 1, No. 2B, Feb. 1992. Feasibility Study of Ge-Sb-Te Phase-Change Optical Disk Medium for One-Pass Overwrite Digital Audio Recording Kenichi Nishiuchi, et al. (Received Sep. 19, 1991; accepted for publication Nov. 16, 1991).
Ultrahigh Density Recording Using Overwritable Phase Change Optical Disk I. Morimoto, et al. SPIE vol. 1663 Optical Data Storage (1992) pp. 294-304.

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