Fabrication process for hermetically sealed chamber in substrate
CA 2221443 C · Owner: Advanced Vision Technologies, Inc. · Inventors: Potter, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for fabricating, in a planar substrate a hermetically sealed chamber for a field-emission cell or the like allows operating the, device in a vacuum or a low pressure inert gas. The process includes methods of covering an opening (160) enclosing the vacuum or gas, and methods of including an optional quantity of gettering material. An example of a device using such a hermetically sealed chamber is a lateral-emitter field-emission device (10) having a lateral emitter (100) parallel to a substrate (20) and having a simplified anode structure (70). In one simple embodiment, a control electrode (140) is positioned in a plane above the emitter edge (110) and automatically aligned to …
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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 May 31, 1996 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2018.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.