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Expired Canadian patentCanada

Fabrication of interlayer conductive paths in integrated circuits

CA 1286795 C · Owner: Massachusetts Institute Of Technology · Inventors: Herndon, Terry O.; Chapman, Glenn H.

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Abstract From the Canadian patent

A method of producing interlayer conductive paths having substantially planar top surfaces in a multilayer integrated circuit structure comprising, the steps of forming elements of either a conductive or semiconductive material as a lower layer depositing an insulative layer on top of the lower layer elements, implanting ions into one or more selected regions of the insulative layer forming at, least one upper conductor over the selected regions and sintering the integrated circuit structure sufficient to render the selected regions conductive. The invention also embraces an integrated circuit structures with interlayer conductive paths made in accordance with this method.

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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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 9, 1988
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286795 C
Classification (IPC)H01L21/44 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedJune 9, 1988Patent grantedJuly 23, 1991Term endedJuly 23, 2008

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