Metallic thin film and method of manufacturing the same, and surface acoustic wave device using the metallic thin film and the method thereof
CA 2195486 C · Owner: Yoshino, Yukio · Inventors: Sakurai, Atsushi; Yoshino, Yukio; Kobayashi, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
By using a dual ion-beam sputtering apparatus an aluminum thin-film is formed on a glass substrate made of an amorphous material. While radiating an ion beam for assisting the film formation from an ion source onto the glass substrate, the aluminum thin-film is formed by depositing the sputtering ions which are generated by radiating an ion beam onto an aluminum target.
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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 January 20, 1997 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.