Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2006-09-05
2006-09-05
Neyzari, Ali (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275400
Reexamination Certificate
active
07102986
ABSTRACT:
The present invention provides an optical disk comprising: at least a rewritable region and a read-only data region, wherein the rewritable region includes a plurality of groove tracks and a plurality of land tracks, the read-only data region includes a plurality of groove tracks and a plurality of land tracks, read-only data comprising control data are written as concavo-convex pits to the groove tracks and/or the land tracks in the read-only data region, and the width of each groove in the read-only data region is smaller than that of each groove in the rewritable region. According to the first optical disk of the present invention, the area of rewritable regions for users can be ensured as broadly as possible failing to deteriorate the high-speed performance of the system.
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Iida Koichi
Kuroda Sumio
Moribe Mineo
Takemoto Hiroyuki
Fujitsu Limited
Greer Burns & Crain Ltd.
Neyzari Ali
Sony Corporation
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