Permanent thermo-optical memory structure

Details Permanent thermo-optical memory structure Permanent thermo-optical memory structure

G - Physics

11

B

352/33.3, 352/32

G11B 11/00 (2006.01) G11B 7/00 (2006.01) G11B 7/243 (2006.01)

Patent

CA 1157150

ABSTRACT OF THE DISCLOSURE The invention relates to a permanent memory structure supported by a moving substrate. This sub- strate 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), whilst 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.

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