High density readable only optical disc and method of...

Details High density readable only optical disc and method of... High density readable only optical disc and method of...

2006-08-08

2006-08-08

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C439S270000

Reexamination Certificate

active

07087284

ABSTRACT:
A high density readable only optical disc includes a substrate having pits with different lengths in accordance with unit information, wherein a depth of the pit increases as the pit length increases; and a mask layer that includes a metal oxide, or a mixture of fine metal particles and a dielectric material. The high density readable only optical disc may be used to read pits not greater than a reading resolution limit and to obtain an optimal CNR since a pit depth is varied depending on a pit length. Also, a method of the high density readable only optical disc may be used to prepare a high density readable only optical disc having an optimal pit depth in accordance with a pit length.

REFERENCES:
patent: 6130871 (2000-10-01), Watabe
patent: 6312780 (2001-11-01), Kasami et al.
patent: 6741549 (2004-05-01), Tominaga et al.
patent: 6848115 (2005-01-01), Sugiura et al.
patent: 6896946 (2005-05-01), Chen
patent: 2004/0161575 (2004-08-01), Hwang et al.
patent: 2004/0257968 (2004-12-01), Kim et al.
patent: 2005/0009260 (2005-01-01), Kim et al.
patent: 2005/0106351 (2005-05-01), Hwang et al.
patent: 62-184630 (1987-08-01), None
patent: 62-188026 (1987-08-01), None
patent: 1996-42544 (1996-12-01), None
patent: 1999-34079 (1999-05-01), None

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