Method of manufacturing an interlayer via and a laminate precursor useful for same
CA 2350075 A1 · Owner: Alliedsignal Inc. · Inventors: Smith, Gordon C.; Petti, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal-clad laminate product including a carrier film (21) a release agent , layer (22), a semi-transparent metal layer (10) and a photo dielectric layer (12) deposited on the conductive metal layer (10) and a method for using the metal-clad laminate product to form an interlayer via (32) by exposing at least a portion of a circuit board intermediate prepared from the metal-clad laminate product to light through the semi-transparent metal layer (10) for a period of time sufficient to form an exposed or an unexposed photo dielectric portion and thereafter removing the exposed or unexposed portion of the photo dielectric layer (12) and a corresponding portion of the semi-transparent …
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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 November 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2021.
- 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.