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:
Jan. 10, 2012
Filed:
Apr. 03, 2008
Bérangère Hyot, Eybens, FR;
Bernard Andre, Quaix En Chartreuse, FR;
Pierre Desre, Meylan, FR;
Xavier Biquard, Tullins, FR;
Bérangère Hyot, Eybens, FR;
Bernard Andre, Quaix En Chartreuse, FR;
Pierre Desre, Meylan, FR;
Xavier Biquard, Tullins, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
The invention relates to the field of optical information recording. According to the invention, an optical storage structure is proposed comprising a substrate equipped with physical marks whose geometrical configuration defines the recorded information, a superposition of three layers on top of the substrate marks, and a transparent protective layer on top of this superposition, the superposition comprising a layer of indium or gallium antimonide inserted between two ZnS/SiOdielectric layers. The antimonide layer has a polycrystalline structure with an average crystal grain size between 5 and 50 nanometers. The non-linear behavior of the superposition of three layers under the read laser makes it possible to read information having a size below the theoretical resolution of the reading system.