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Expired Canadian patentCanada

High voltage, high temperature capacitor structures and methods of fabricating same

CA 2448006 C · Owner: Lipkin, Lori A. · Inventors: Sheppard, Scott; Das, Mrinal Kanti; Hagleitner, Helmut

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Abstract From the Canadian patent

Capacitors and interconnection structures for silicon carbide are provided having an oxide layer, a layer of dielectric material and a second oxide layer on the layer of dielectric material. The thickness of the oxide layers may be from about 0.5 to about 33 percent of the thickness of the oxide layers and the layer of dielectric material. Capacitors and interconnection structures for silicon carbide having silicon oxynitride layer as a dielectric structure are also provided. Such a dielectric structure may be between metal layers to provide a metal-insulator-metal capacitor or may be used as a inter-metal dielectric of an interconnect structure so as to provide devices and …

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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

  • Filed March 26, 2002 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2024.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 26, 2002
GrantedNovember 19, 2013
Term endedMarch 26, 2022
Patent numberCA 2448006 C
Classification (IPC)H01G4/01 +2 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedMarch 26, 2002Patent grantedNov 19, 2013Term endedMarch 26, 2022

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.