Double mesa avalanche photodetector

Details Double mesa avalanche photodetector Double mesa avalanche photodetector

H - Electricity

01

L

345/24

H01L 31/10 (2006.01) H01L 31/0304 (2006.01) H01L 31/107 (2006.01)

Patent

CA 1228662

-10- DOUBLE MESA AVALANCHE PHOTODETECTOR ABSTRACT OF THE DISCLOSURE The invention relates to a photodetector wherein the avalanche region is separated from the detector surfaces by a region in which the electric field under reverse bias will be less than in the avalanche region. This photodetector includes an absorptive region having a planar surface area surrounded by a non-planar surface area. A first region overlies the planar area and a second region of opposite conductivity type overlies both the first region and the non-planar area of the absorptive region. The high electric fields are restricted to the first region which is isolated from the surfaces of the photodetector.

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