Method of forming electrically conducting layer
CA 2007180 C · Owner: Ogitani, Osamu · Inventors: Ogitani, Osamu; Shirose, Toru; Fujii, Ryuichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A conducting layer such as an additional wiring pattern or an electromagnetic insulation layer is formed on a conducting surface such as of a printed circuit board with an insulating layer being interposed therebetween by a method, which includes the steps of: (a) providing a liquid thermosetting composition containing an epoxy resin, a curing agent a polymerizable, compound having at least two acrylate or methacrylate groups and a photopolymerization initiator;, (b) applying the composition to the conducting surface to form a coated layer;, (c) irradiating actinic light on the coated layer to polymerize the polymerizable compound and to obtain a solid thermosetting layer, (d) …
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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 January 4, 1990 and granted August 24, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2012.
- 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.