Magnetic optical member and method of producing the same
CA 2313768 A1 · Owner: Takayama, Akio · Inventors: Adachi, Shigeyuki; Kato, Hideki; Kitamura, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a magnetic optical member that can obtain a large magneto-optical effect using a rare-earth- iron-garnet-based material and a method of producing the same. According to the present invention a BiYIG thin film (207) is formed on a (SiO2/Ta2O5)n layer (210), and heat-treatment for crystallization of the BiYIG thin film (207) is carried out with infrared rays while cooling a non-heat-resisting substrate (203) and the (SiO2/Ta2O5)n layer (210) through a substrate holder (201). Since the non-heat-resisting substrate (203) is cooled and the deformation thereof is prevented, heat treatment to crystallize the BiYIG thin film (207) can be carried out. By the crystallization …
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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 July 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2022.
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Timeline
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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.