Dynamic information storage or retrieval – Storage medium structure – Specific disc profile
Reexamination Certificate
2006-03-14
2006-03-14
Castro, Angel (Department: 2653)
Dynamic information storage or retrieval
Storage medium structure
Specific disc profile
Reexamination Certificate
active
07012880
ABSTRACT:
The present invention relates to a high-density disk that is structured to prevent a collision of an optical pickup's objective lens with the high-density disk if the disk is placed upside down in a disk device that is able to record and reproduce signals to/from the high-density disk. A high-density disk recording medium according to the present invention is structured such that, wherein a recording layer having high-density pit patterns is offset from a center plane of disk thickness, both sides of a clamping zone bisected by the center plane have differing thicknesses. One or both sides may protrude from surface of the disk recording medium, or one side of the clamping zone may protrude from the surface while the other side is indented below the surface.
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Kim Jin Yong
Park Kyung Chan
Castro Angel
Lee, Hong, Degerman, Kang & Schmadeka P.C.
LG Electronics Inc.
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