Process for growing crystalline thin film
CA 2048517 C · Owner: Kumomi, Hideya · Inventors: Kumomi, Hideya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for growing a crystalline thin film comprises forming a crystalline region comprising a single crystal-nucleus or crystal-grain at a predetermined position of an amorphous thin film, then implanting ions of at least one element constituting the amorphous thin film into a region other than the crystalline region and thereafter carrying out heat treatment to have the crystal-nucleus or crystal-grain grown along the plane direction of the amorphous thin film thereby, crystallizing the amorphous film by solid phase growth.
Read the whole patent
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 7, 1991 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2013.
- 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
Timeline From CIPO dates
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.