Optical disk and method of manufacturing the same

Details Optical disk and method of manufacturing the same Optical disk and method of manufacturing the same

1995-09-20

1997-08-05

Hindi, Nabil

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692753, G11B 724

Patent

active

056549539

ABSTRACT:
The present invention relates to an optical disk and a method of manufacturing the same, and, more particularly, to an optical disk which can ensure high-density recording and a method of pre-formatting this optical disk. This optical disk has a surface on which data is retrieved with a focused light beam and a light beam spot of a predetermined size is formed by the focused light beam, and comprises a first pit group having a plurality of unit pits of a unit pit length arranged in such a manner that adjoining unit pits are separated from each other with a blank of a first blank length, the blank being smaller than a size of the beam spot, the first blank length being set shorter than the unit pit length, and a second pit group following the first pit group and having a plurality of data pits whose lengths are substantially integer multiples of the unit pit length, the data pits being separated from one another with a blank of a second blank length.

REFERENCES:
patent: 5111443 (1992-05-01), Yokogawa
patent: 5327411 (1994-07-01), Iwasa et al.
patent: 5345434 (1994-09-01), Ide et al.
patent: 5347505 (1994-09-01), Moritsuga et al.
patent: 5400318 (1995-03-01), Nakayama et al.
patent: 5428594 (1995-06-01), Izumi et al.
patent: 5483513 (1996-01-01), Fuji
patent: 5533003 (1996-07-01), Kobayashi
patent: 5537381 (1996-07-01), Fuji

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