Method of recording or reproducing data on or from high...

Details Method of recording or reproducing data on or from high... Method of recording or reproducing data on or from high...

2006-03-07

2006-03-07

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

Systems having plural physically distinct independent tracks...

Having layered storage medium

C369S047500

Reexamination Certificate

active

07009927

ABSTRACT:
A high-density optical recording medium and method of recording data on the optical recording medium. The optical recording medium includes a plurality of data recording/reproducing surfaces having reflectances for light passing through a pit area, a land/groove area, and a land/groove area on which data are recorded, of a data recording/reproducing surface included between a light source for emitting light and a recording/reproducing surface selected from the plurality of data recording/reproducing surfaces, the reflectances satisfy the expressions r1≧r2≧r3and {(r1−r3)/r3}≦0.2, where r1, r2and r3are the reflectances of the pit area, the land/groove area and the land groove area on which data are recorded, respectively.

REFERENCES:
patent: 5756265 (1998-05-01), Abe et al.
patent: 8-96406 (1996-04-01), None
patent: 2000-285469 (2000-10-01), None
patent: 2002-133667 (2002-05-01), None
patent: 2002-133714 (2002-05-01), None
Japanese Office Action dated Aug. 10, 2004.

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