Semiconductor device with underpass interconnection zone
CA 1075372 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Jochems, Pieter J.W.; Van Zanten, Adrianus T.; Kooi, Else
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In Locos N-channel MOST-IC's underpasses can be obtained below the locos pattern by performing, at the area where the underpasses are to be formed, an As or Sb implantation prior to providing the locos. By using the nitride mask as an implantation mask, the locos and the source/drain zones of the transistors can be provided in a self-registering manner with respect to the underpasses. - 28 -
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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 April 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 1997.
- 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.