Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2007-02-13
2007-02-13
Dinh, Tan (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C428S064100
Reexamination Certificate
active
10698422
ABSTRACT:
A recording medium comprises pairs of groove tracks and land tracks provided side by side while being bent periodically, a plurality of land prepits previously formed on the land tracks and carrying information about the groove tracks, and a recording layer formed on at least the groove tracks and the land tracks. The land prepits have a radius of mean curvature smaller than a radius of mean curvature of sides of the groove tracks in land-prepit absent regions of the land prepits and are defined by curved surfaces continuously extending from the sides of the groove tracks. Those sides of the groove tracks which face the continuous curved surfaces of the land prepits are curved surfaces that stricture the groove tracks.
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Kato Masahiro
Muramatsu Eiji
Taniguchi Shoji
Yamaguchi Atsushi
Chu Kim-Kwok
Dinh Tan
Drinker Biddle & Reath LLP
Pioneer Corporation
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