Information medium adapted to be written by thermo- optical means and method of manufacturing same
CA 1237279 A · Owner: Societe Anonyme Dite: Alcatel Thomson Gigadisc · Inventors: Benhamou, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An information medium adapted to be written by thermo-optical means comprising a heat-sensitive structure adapted to store information to be read by optical means. This includes a thin metal layer which, when incident writing radiation impinges on it causes a, transient localized temperature rise. Above a temperature threshold this causes a change in the optical characteristics of the heat-sensitive structure. The information medium is manufactured by a method involving depositing a continuous thin film of polycrystalline aggregate over an acceptor surface of the aforementioned structure by means of an incident flux of particles of a precious metal and a transition metal. In order to obtain …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.