Self-aligned semiconductor method
CA 1138123 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Nicholas, Keith H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1 PHB. 32 629, ABSTRACT:, Method for self-aligned manufacturing of an insulating layer on top of a doped region surrounding a semiconductor circuit element. According to the invention first an insulating layer is provided on a semiconductor body portion. Then a first masking layer is provided on top of part of the insulating layer. The doped region is formed by ion implantation through the insulating layer in the semiconductor surface not covered by the first masking layer. Then a second masking layer is provided on the first masking layer and on the insulating layer. After that the first masking layer with the portion of the second masking layer on top of it is removed. Then the uncovered …
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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 December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.