Non-crucible zone-melting of a semi-conductor
CA 1053545 A · Owner: Siemens Aktiengesellschaft · Inventors: Keller, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for non-crucible zone-melting of a semiconductor crystal rod, in which method the end of the crystal rod is supported by a funnel-shaped sleeve which is connected to the seed-crystal holder is, axially displaceable, and is provided with a filler the said funnel-shaped, sleeve, in its uppermost position surrounding the cone area of the said, rod.
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
- Granted May 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
- 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.