Dynamic optical information storage or retrieval – Optical storage medium structure
Reexamination Certificate
2011-08-23
2011-08-23
Castro, Angel A. (Department: 2627)
Dynamic optical information storage or retrieval
Optical storage medium structure
Reexamination Certificate
active
08006256
ABSTRACT:
A recording layer is described that is at least partially or entirely positioned at a distance T7of less than 0.4 mm with respect to the second surface. When the optical recording medium is clamped in a drive, the recording layer has a “higher” position than a recording layer of a known DVD. The layer structure of the described optical recording medium reduces the thickness of the disc in an area of the recording layer. In particular, a thickness T1of only 0.4 to 0.7 mm is possible while maintaining the reliability of the optical recording medium (i.e. without reading problems in most or all drives). Further, the optical recording medium may have only one substrate, i.e. only one disc of polycarbonate, whereas the other side of the recording layer is only covered by a protective lacquer.
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Fetouhi Al
Nute Roger
Castro Angel A.
Ecodisc Technology AG
Titus John D.
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