Double-sided optical media for a disk storage device

Details Double-sided optical media for a disk storage device Double-sided optical media for a disk storage device

1993-02-22

1995-11-28

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428913, 3692752, 3692754, 369277, 369283, 369286, 369288, 430270, 430945, B32B 300

Patent

active

054706270

ABSTRACT:
A double-sided optical storage disk comprises a single substrate having a microstructure formed on each side surface thereof. The microstructure is in the form of grooves or pits arranged in a spiral or concentric circles. Formed on each side surface of the substrate are a reflective layer, and a transparent protective layer. The reflective layer is formed of aluminum alloy. The protective outer layer is formed of a transparent anti-corrosive material, specifically compatibly with an air-bearing, low-flying, read head, preferably silicon nitride.

REFERENCES:
patent: 4918556 (1990-04-01), Ezaki et al.
patent: 5202880 (1993-04-01), Lee et al.
Levene, "Applications For High Capacity, High Data Rate Optical Disk Buffer", Proceedings of Spie, vol. 899, 12 Jan. 1988, Bellingham, Wash. USA, pp. 279-283, XP000010870.
Patent Abstracts Of Japan, vol. 15, No. 255 (P-1221) 27 Jun. 1991 & JP-A-03083226 (Sony Corp.) 9 Apr. 1991.
Patent Abstracts Of Japan, vol. 16, No. 24 (P-1301) 21 Jan. 1992 & JP-A-03 237 631 (Sony Corp.) 23 Oct. 1991.
Patent Abstracts Of Japan, vol. 14, No. 569 (P-1144) 18 Dec. 1990 & JP-A-02 244445 (Hitachi Ltd.) 28 Sep. 1990.
Patent Abstracts Of Japan, vol. 14, No. 124 (P-1018) 8 Mar. 1990 & JP-A-01 319143 (Ricoh Co Ltd.) 25 Dec. 1989.

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