The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2011
Filed:
Apr. 01, 2008
Bérangère Hyot, Eybens, FR;
Bernard Andre, Quaix En Chartreuse, FR;
Pierre Desre, Meylan, FR;
Ludovic Poupinet, Sassenage, FR;
Patrick Chaton, Theys, FR;
Bérangère Hyot, Eybens, FR;
Bernard Andre, Quaix En Chartreuse, FR;
Pierre Desre, Meylan, FR;
Ludovic Poupinet, Sassenage, FR;
Patrick Chaton, Theys, FR;
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/SiOlayers. Application for protecting sensitive data.