Radiation-sensitive semiconductor device
CA 1291554 C · Owner: Koninklijke Philips Electronics N.V. · Inventors: Hoeberechts, Arthur M.E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Radiation-sensitive semiconductor device. A radiation sensitive semiconductor device comprising a high-ohmic semiconductor wafer having a thicker edge portion (1A) and a thinner central portion (1B) in, which a photodiode (5) is located. The surface opposite to the photodiode is provided with a highly doped contact layer (7), on which a metal layer (8) is provided. The central portion is so thin that at a low photodiode voltage the depletion zone of the photodiode extends as far as the contact layer (7). According to the invention the, device comprises an active screening diode (11) which, extends both in the edge portion and in the central portion and whose depletion zone extends in the …
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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
- Granted October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
- 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.