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Proceedings Paper

High-density recording using phase-change optical disk
Author(s): Kazuhiro Nishimura; T. Suzuki; Keigo Takeguchi; Masato Terada; Isao Morimoto
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Paper Abstract

We have measured linear velocity dependency of overwriting erasability and jitter. It was found that overwriting jitter correlates with overwriting erasability which reflects the degree of mark distortion. A 5-layered disk was developed whose absorptivity of crystalline state was larger than that of amorphous state. This disk showed small jitter, which was less than 16% and 15m/s when the bit length was 0.45 micrometers /bit without applying a writing compensation. And we have studied land/groove recording at relativley low linear velocity of 4.5 m/s. Crosstalk both from land and groove were lower than -26db in the recording pitch of 0.7 micrometers , which is sufficiently small for practical use. The bit length of 0.45 micrometers /bit and the recording pitch of 0.7 micrometers realize 2.6 Gbytes in 120 mm, supposing that user data capacity is three quarters of the total capacity.

Paper Details

Date Published: 8 September 1995
PDF: 10 pages
Proc. SPIE 2514, Optical Data Storage '95, (8 September 1995); doi: 10.1117/12.218725
Show Author Affiliations
Kazuhiro Nishimura, Asahi Chemical Industry Co., Ltd. (Japan)
T. Suzuki, Asahi Chemical Industry Co., Ltd. (Japan)
Keigo Takeguchi, Asahi Chemical Industry Co., Ltd. (Japan)
Masato Terada, Asahi Chemical Industry Co., Ltd. (Japan)
Isao Morimoto, Asahi Chemical Industry Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 2514:
Optical Data Storage '95
Gordon R. Knight; Hiroshi Ooki; Yuan-Sheng Tyan, Editor(s)

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