Spacers for cells having spaced opposed substrates
CA 2353495 A1 · Owner: The Secretary Of State For Defence · Inventors: Yu, Tat Chi B.; Wilkinson, Timothy David; Crossland, William Alden
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an active semiconductor backplane for a liquid crystal spatial light modulator, spacers (25) which are distributed over the backplane extend above an array of electrical and/or electronic elements and comprise at least two layers essentially of the same material and occuring in the same order as is found in at least one of the electrical or electronic elements such as an , NMOS transistor (52). The latter is formed from a stack of layers on a silicon substrate (51) comprising polysilicon (56) continuous silicon oxide (57) , modified to include gate oxide GOX (55) metallic gate electrode (59), continuous silicon oxide (58) and a metallic drain electrode (60) which is coupled to a …
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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 December 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2021.
- 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.