Method for manufacturing superconducting thin film formed of oxide superconductor having non superconducting region in it, method for manufacturing superconducting device utilizing the superconducting thin film and superconducting thin film manufactured thereby
CA 2077047 C · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Tanaka, So; Iiyama, Michitomo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For manufacturing a superconducting thin film having at least one non-superconducting region at and near its surface portion an oxide, superconductor thin film is formed on a surface of the substrate. The oxide superconductor thin film is heated in high vacuum environment so that oxygen of the oxide superconductor crystals escapes from the surface of the oxide superconductor thin film and a surface portion of the oxide superconductor thin film having a substantial thickness changes into non-superconducting layer of a compound oxide which is composed of the same constituent elements as those of the oxide superconductor but includes the oxygen amount less than that of the oxide superconductor …
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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
- Filed August 27, 1992 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2014.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.