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Expired Canadian patentCanada

Thick bus metallization interconnect structure to reduce bus area

CA 1249070 A · Owner: Fairchild Semiconductor Corporation · Inventors: Asuncion, Andres D.; Brown, Robert; Hingarh, Hemraj

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

There is disclosed a structure for self aligned and non self aligned power and ground buses and interconnects for integrated circuits which are thicker than normal conductors. This enables them to withstand higher current densities without adverse electromigration effects. There is also disclosed a method for making such structures.

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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 January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • 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 18, 1986
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1249070 A
Classification (IPC)H01L27/04 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedMarch 18, 1986Patent grantedJan 17, 1989Term endedJan 17, 2006

Sources & verification

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