Voltage-protected semiconductor bridge igniter elements
CA 2275973 C · Owner: Martinez-Tovar, Bernardo · Inventors: Foster, Martin C.; Martinez-Tovar, Bernardo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A semiconductor bridge igniter device (10) having integral voltage anti-fuse protection provides an electric circuit including a firing leg and optionally, a monitor leg. The firing leg comprises semiconductor pads (14a 14b) separated and connected by a bridge (14c) and having metallized lands (16a, 16b) disposed over the pads (14a 14b) so that an electrical potential , applied across the metallized lands (16a 16b) will cause sufficient current , to flow through the firing leg of the electric circuit to release energy at the bridge (14c). A dielectric layer (15) is interposed within the firing leg and has a breakdown voltage equal to a selected threshold voltage (Vth) and therefore …
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.
Why it's free to use
- Filed December 29, 1997 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2019.
- 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.