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.

Date Published: 8 September 1995
PDF: 10 pages
Proc. SPIE 2514, Optical Data Storage '95, (8 September 1995); doi: 10.1117/12.218725

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