Multi-spectrum photodiode devices
CA 1138081 A · Owner: Recognition Equipment Incorporated · Inventors: Carr, William N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
One or more photoelectric device elements are formed beneath the surface of a monolithic semiconductor structure below a surface photoelectric detector device to form a plurality of photoelectric devices having different spectral responses. The surface element is responsive to visible light and the one or more subsurface devices are sensitive to longer wavelength radiation depending upon the depth of the device below the surface of the structure. A two dimensional array of the devices may be formed in a single semiconductor wafer to provide a self-scanning multi-element photosensor array.
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, and the Claude kit works from them.
Why it's free to use
- Granted December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.