Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1991-05-02
1994-10-04
Dzierzynski, Paul M.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
360105, G11B 554
Patent
active
053532783
ABSTRACT:
A magneto-optical disk comprising a substrate whereon a recording medium is formed, and a depression is formed on the substrate on the inside of the recording medium of the substrate. A center hub is installed on the depression such that the center hub is substantially level with a protective resin layer covering the recording medium. On the center hub, a flying head performs CSS (Contact Start and Stop). This configuration of the disk eliminates the occurrence of dust due to the abrasion and head crash, and achieves stable CSS. A method of manufacturing the magneto-optical disk, wherein the protective resin layer is formed after installing the center hub on the depression. In this method, since a space is not produced between the center hub and the protective resin layer, the stable flying characteristics is obtained. And a magneto-optical disk whereon small physical bumps and pits are formed on the substrate on the inside of the recording medium, which prevents the flying head from sticking to the disk. A method of manufacturing the magneto-optical disk by using a stamper, which permits the disk to be mass produced.
REFERENCES:
patent: 5057960 (1991-10-01), Shiba et al.
patent: 5072438 (1991-12-01), Suzuki et al.
Ira A. Gerson and Mark A. Jasuik, "Vector Sum Excited Linear Prediction (VSELP) Speech Coding at 8 KBPS", Proc. IEEE Int. Conf. ASSP, pp. 461-464 Apr. 1990.
High Speed Overwritable Magneto-Optic Recording, Proc. Int. Symp. on Optical Memory, 1987, Japanese Journal of Applied Physics, vol. 26 (1987) Supplement 26-4.
Katayama Hiroyuki
Murakami Yoshiteru
Nakayama Junichiro
Ohta Kenji
Takahashi Akira
Brown Donald
Conlin David G.
Dzierzynski Paul M.
Nguyen Kiet T.
Sharp Kabushiki Kaisha
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