Reversible memory structure with thermo-optical writing and opti

Details Reversible memory structure with thermo-optical writing and opti Reversible memory structure with thermo-optical writing and opti

1981-01-27

1983-02-01

Stellar, George G.

Static information storage and retrieval

Information masking

Thermoplastic

365106, 365113, 365120, 365124, 369100, 369109, 369275, 369284, 369286, 369288, G11C 1304, G11B 724

Patent

active

043719546

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.

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