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:
Feb. 01, 1983
Filed:
Jan. 27, 1981
Jean Cornet, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The invention relates to a reversible memory structure with thermo-optical inscription or writing and optical reading on a moving support. According to the invention, the memory structure deposited on a substrate (1) is constituted by a double layer (2 and 3). A second alloy layer (3) at ambient temperature in the martensitic phase is deposited on a first thermally deformable layer (2). A heat pulse creates a deformation in the first layer, which deforms the martensitic alloy layer. A more powerful heat pulse raises the alloy layer to a temperature above its transformation point from the martensitic phase to another crystallographic phase and erases the inscribed deformation. Particular application to optical disks.