Process for producing a semiconductor article
CA 1296816 C · Owner: Yamagata, Kenji · Inventors: Yamagata, Kenji; Ichikawa, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a semiconductor article comprises applying crystal formation treatment to a substrate having a free surface on which a nonnucleation surface exhibiting a smaller nucleation density and a nucleation surface of an amorphous material exhibiting a larger nucleation density and having a sufficiently minute area so as to allow only a single nucleus to be formed thereon are disposed next to each other whereby a semiconductor monocrystal is permitted to grow from the nucleus, the production conditions during said crystal formation treatment being varied to form semiconductor crystal regions different in their characteristics within at least part of said semiconductor …
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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 2009.
- 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.