Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-04-12
2011-04-12
Psitos, Aristotelis (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S100000
Reexamination Certificate
active
07924690
ABSTRACT:
The invention relates to the field of optical information recording. In order to prevent abusive or fraudulent use of storage media, the invention provides a process for intentional degradation of information by application of a laser power below the normal power for reading information recorded in super-resolution on the media. This process relies on the surprising observation that a laser power below the super-resolution read power produces an irreversible degradation of the information recorded. This observation has been made with regard to media composed of a three-layer structure comprising an InSb or GaSb layer between two ZnS/SiO2layers. Application for protecting sensitive data.
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Masaki Yamamoto et al. “Super-Resolution Optical Disc with High Readout Stability Using a Zinc Oxide Thin Film.” Japanese Journal of Applied Physics, vol. 43, No. 7B, 2005, pp. 4959-4963, XP007903495.
Andre Bernard
Chaton Patrick
Desre Pierre
Hyot Bérangère
Poupinet Ludovic
Commissariat a l''Energie Atomique
Lowe Hauptman & Ham & Berner, LLP
Psitos Aristotelis
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