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Canadian application, no grantCanada

Contact planarization materials that generate no volatile byproducts or residue during curing

CA 2462613 A1 · Owner: Lamb, James E. Iii · Inventors: Shih, Wu-Sheng; Daffron, Mark; Lamb, James E. Iii

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The present invention is directed towards planarization materials that produce little or no volatile byproducts during the hardening process when used in contact planarization process. The materials can be hardened by photoorradiation or by heat during the planirization process and they include one , or more types of monomers oligomers, or mixtures thereof, an optional crosslinker, and an optional organic reactive solvents. The solvent if used, is , chemically reacted with the monomers or oligomers and thus becomes part of the polymer matrix during the curing process. These materials can be used for damascene, dual damascene, bi-layer, and multi-layer applications microelectromechanical …

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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 October 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 29, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 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.
FiledOctober 29, 2002
GrantedNo grant recorded
Term endedOctober 29, 2022
Patent numberCA 2462613 A1
Classification (IPC)H01L21/47 +2 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedOct 29, 2002Term endedOct 29, 2022

Sources & verification

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