H - Electricity – 01 – L
Patent
H - Electricity
01
L
345/16
H01L 31/00 (2006.01) H01L 31/109 (2006.01) H01L 31/12 (2006.01) H01L 33/00 (2006.01) H04B 10/28 (2006.01)
Patent
CA 1121490
ABSTRACT OF THE DISCLOSURE: The invention relates to a diode capable of emitting and receiving light-rays of a predetermined wavelength, comprising: a semiconductor substrate having a major surface, a photoreceptive semiconductor layer of first conductivity type, having a forbidden bandwidth E1, an optical confinement semiconductor layer of first conductivity type, having a forbidden bandwidth E3, disposed on the photoreceptive layer, a photoemissive semiconductor layer of a second conductivity type, having a forbidden bandwidth E2,disposed on the optical confinement layer, and a fourth semiconductor layer of a second conductivity type having a forbidden bandwidth E4, disposed on the photoemissive layer. The forbidden bandwidths satisfy the following relationships: E1 < E2 < E3 ? E4. The semiconductor substrate is disposed either on the photoreceptive semiconductor layer, this substrate having the same conductivity type of the photoreceptive semiconductor layer, or on the fourth semiconductor layer, this substrate having the same conductivity type of the fourth semiconductor layer. The invention is applicable to a system of telecommunication by optical fiber.
315358
Robic Robic & Associes/associates
Thomson-Csf
LandOfFree
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