Patent ID: 9040916
Filing Date: 2015-05-26
Classification: G01J,H01L

Abstract:
1. A detector of visible and near-infrared radiation comprising: a layer of a material optimized for near-infrared detection; a near-infrared photosensitive element formed in the layer of the material optimized for near-infrared detection; a silicon substrate having a frontside covered with the layer of the material optimized for near-infrared detection; a first readout circuit for reading the near-infrared photosensitive element, formed on the frontside of the silicon substrate; four visible photosensitive elements, formed in the silicon substrate, one of the visible photosensitive elements being arranged in front of the near-infrared photosensitive element; and three interference filters respectively associated with three elementary colors and arranged at a backside of the silicon substrate to define a pixel quadruplet, each interference filter comprising an alternation of metal layers and of dielectric layers, wherein a first pixel of the pixel quadruplet, comprising the near-infrared photosensitive element and one of the visible photosensitive elements, is devoid of interference filter, and the three other pixels of the pixel quadruplet, respectively comprising the three other visible photosensitive elements, are respectively provided with the three interference filters, and the near-infrared photosensitive element of the first pixel extends over one of the three other pixels.