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Proceedings Paper

Highly reliable 7-GB, 1.2- to 2.2-MB/s, 12-inch write-once optical disk
Author(s): Hitoshi Watanabe; Eiji Koyama; T. Nunomura; T. Taii; Michio Miura; Akira Gotoh; Tetsuya Nishida; Shinkichi Horigome; Norio Ohta
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Paper Abstract

In order to extend an application area of 12 inch write once optical disks, both a larger data capacity and higher data transfer rate are required, which in turn requires more advanced reliability and durability. This paper describers a double sided 7GB twelve inch diameter disk suitable for high data transfer (1.2-2.2 MB/s) application. A storage data capacity is increased by using both the pit- edge method and the Modified Constant Angular Velocity (MCAV) method. The corrosion resistant Te based ternary alloy recording layer has an excellent pit length characteristics and less thermal interference, which results in wide jitter margin in the pit edge detection. The high speed disk rotation gives the high data transfer rate. Acceleration tests prove a disk life longer than 45 years.

Paper Details

Date Published: 1 July 1991
PDF: 8 pages
Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); doi: 10.1117/12.45918
Show Author Affiliations
Hitoshi Watanabe, Hitachi Maxell Ltd. (Japan)
Eiji Koyama, Hitachi Maxell Ltd. (Japan)
T. Nunomura, Hitachi Maxell Ltd. (Japan)
T. Taii, Hitachi Maxell Ltd. (Japan)
Michio Miura, Hitachi Maxell Ltd. (Japan)
Akira Gotoh, Hitachi Maxell Ltd. (Japan)
Tetsuya Nishida, Hitachi Ltd. (Japan)
Shinkichi Horigome, Hitachi Ltd. (Japan)
Norio Ohta, Hitachi Maxell Ltd. (Japan)


Published in SPIE Proceedings Vol. 1499:
Optical Data Storage '91

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