Capacitor structures with dual dielectrics
CA 1159917 A · Owner: International Business Machines Corporation · Inventors: Howard, James K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Capacitor Structures With Dual Dielectrics Abstract, A capacitor structure, for semiconductor devices, utilizing a dual or duplex dielectric wherein one dielectric layer is comprised of silicon nitride or aluminum oxide and a second dielectric layer is formed Ta2O5, HfO2 TiO2, PbTiO3, BaTiO3, CaTiO3 or SrTiO3. FI9-79-0377
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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 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- 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.