Semiconductor device and method for manufacturing the same
CA 2047486 C · Owner: Yoshitake, Junichi · Inventors: Yoshitake, Junichi; Katayama, Shigeru; Tominaga, Kaoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a package construction of a semiconductor device and provides a hollow package for holding a semiconductor device in which a vapour-impermeable moistureproof plate is embedded in a bottom surface thereof or at a position inwardly of the bottom surface to provide increased moisture impermeability of the package.
Read the whole patent
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 July 19, 1991 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2013.
- 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.