Patent ID: 7355227

Claim:
A matrix of detection pixels comprising: a detection pixel including a photosensitive semiconductor area with a first face covered with a first electrode and a second face located opposite the first face and covered with a second electrode, wherein the photosensitive semiconductor area is configured to convert photons that act on the first face into charge carrier, wherein the first electrode includes metal patterns configured to collect the charge carriers generated in the photosensitive semiconductor area, wherein a shape of the metal pattern is configured so that the photosensitive semiconductor area constitutes, in its entirety, a collection area for all the charge carriers generated in the photosensitive semiconductor area, wherein trenches separate at least one detection pixel from at least one neighbouring detection pixel, and wherein the shape of the metal pattern is such that all points of the photosensitive semiconductor area of the detection pixel are at a distance from the metal pattern that is four times less than the distribution length of the charge carriers in the material of the photosensitive semiconductor area.