Avalanche photodiode for use in harsh environments
CA 2451295 C · Owner: Matocha, Kevin S. · Inventors: Sandvik, Peter M.; Matocha, Kevin S.; Kretchmer, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An avalanche photodiode (APD) is provided for detecting ultraviolet photons. The , APD comprises a substrate (110) having a first dopant; a first layer (111) having the , first dopant, positioned on top of the substrate; a second layer (112) having a second , dopant, positioned on top of the first layer; a third layer (114) having the second , dopant, positioned on top of the second layer. A passivation layer (116 122) , provides , electrical passivation on a surface of the APD. A phosphorous silicate glass , layer , (124) positioned on top of the third layer limits mobile ion transport. A pair of metal , electrodes (118, 120) provides an ohmic contact wherein a first electrode is …
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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 November 27, 2003 and granted May 8, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2025.
- 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.