Patent ID: 9202840
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. Photodetecting device comprising at least: a semiconductor layer doped according to a first type of conductivity; two first semiconductor portions doped according to a second type of conductivity opposed to the first type of conductivity, distinct and separated from one another, and arranged in the semiconductor layer next to one another; a second semiconductor portion doped according to the first type of conductivity with a level of doping greater than that of the semiconductor layer and delimiting, with the semiconductor layer, the first semiconductor portions such that the first semiconductor portions form, with the semiconductor layer and the second semiconductor portion, p-n junctions, wherein at least one part of the semiconductor layer doped according to the first type of conductivity separates the first semiconductor portions in such a way that depletion zones between the first semiconductor portions form at least one potential barrier of which the level is less than the potential level of the second semiconductor portion and less than the potential level of the semiconductor layer, and wherein: at least one fourth doped semiconductor portion according to the second type of conductivity is arranged in the part of the semiconductor layer between the first semiconductor portions, and wherein a level of doping of the first semiconductor portions is higher than a level of doping of the fourth semiconductor portion such that the potential level of the fourth semiconductor portion is less than the potential level of the second portion and of the semiconductor layer, or the photodetecting device further comprises at least one control gate coupled to the part of the semiconductor layer and able to control a value of the potential between the first semiconductor portions.