Dry replenishment of electroless copper solutions
CA 1069254 A · Owner: Shipley Company Inc. · Inventors: Dutkewych, Oleh B.; Hofmann, Lebert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, This invention is for replenishment of an aqueous electroless plating solution using replenishers essentially free of diluents without decomposing the plating solution. Typical replenisher formulations comprise a combination of a source of metal ions such as cupric sulphate for copper plating solutions and a stabilizer, the stabilizer being in a concentration sufficient to over-stabilize the solution in the immediate vicinity of the plating solution where the replenisher is added but insufficient, in, combination with residual solution stabilizers to poison the, plating solution when thoroughly admixed therewith. Other additives in the replenisher formulation may …
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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 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.