Pyroelectric sensor and fabrication process
CA 2115659 C · Owner: Thomson-Csf Semiconducteurs Specifiques · Inventors: Prost, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Components such as pyroelectric sensors which are particularly sensitive to piezoelectric effects and can be adversely affected as a result by any mechanical stress or vibration are described. These adverse effects may be controlled by inserting a flexible silicone sheet (42) between the chip (10) bearing the pyroelectric film and the bottom of the package (30) so that it absorbs package distorsion without passing it on to the chip. Means are provided to enable connecting leads (34) to be ultrasonically welded even though the flexible sheet is present. The chip is preferably attached to a metallized ceramic wafer (40) and abutments (44) are preferably provided at the package bottom to limit …
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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 June 16, 1993 and granted August 12, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2015.
- 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.