Semiconductor bridge device and method of making the same
CA 2253672 C · Owner: Montoya, John A. · Inventors: Martinez-Tovar, Bernardo; Montoya, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A device, e.g. an explosive-initiation device (24) includes a semiconductor bridge device (10) comprising semiconductor pads (14a 14b) separated by an , initiator bridge (14c) and having metallized lands (16a 16b) disposed over , the pads (14a, 14b). The metallized lands (16a 16b) each comprises a titanium , base layer (18) a titanium-tungsten intermediate layer (20) and a tungsten top layer (22). This multilayer construction is simple to apply provides good , adhesion to semiconductor (14) and enhanced semiconductor bridge characteristics, and avoids electromigration problems attendant upon use of aluminum metallized lands under severe conditions of no-fire tests and very low firing …
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 May 2, 1997 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 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.