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Integrated circuits with several aluminium alloy interconnection levels and method of manufacture

EP 0161981 A2 · Applicant: SOCIETE POUR L'ETUDE ET LA FABRICATION DE CIRCUITS INTEGRES SPECIAUX - E.F.C.I.S.

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed April 29, 1985 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 29, 2005.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by October 29, 2010.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledApril 29, 1985
PublishedNovember 21, 1985
GrantedNever granted
Term endedApril 29, 2005
Application numberEP 85400842
Classification (CPC)H10W20/425 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedApril 29, 1985PublishedNov 21, 1985Term endedApril 29, 2005

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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