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:
Nov. 23, 1982
Filed:
Jan. 27, 1981
Applicant:
Inventor:
Jean Cornet, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11B / ;
U.S. Cl.
CPC ...
365127 ; 3461351 ; 369100 ; 369284 ; 365126 ;
Abstract
The invention relates to a permanent memory structure supported by a moving substrate. This substrate is formed by two metal layers (9, 10) vacuum-deposited on the relatively inexpansible substrate (1). One of the two metal layers is very expansible (9), while the other layer (10) is relatively inexpansible, but ductile. During inscription by the laser beam, the beam energy absorbed by the layers (9, 10) produces an elongation of the expansible layer (9), which deforms the ductile layer (10) by stretching it beyond the elastic limit. There is a permanent deformation of the two-layer assembly, without perforation. Particular application to optical disks.