Patent ID: 8735953

Claim:
An image sensor comprising at least: CMOS-type transistors, CMOS-type photodiodes formed in a semiconductor layer having a thickness of between approximately 1 μm and 1.5 μm, a dielectric layer in which electrical interconnect layers are made, which are electrically connected to one another and/or to the CMOS photodiodes and/or transistors, said dielectric layer being arranged against a first face of the semiconductor layer opposite a second face of the semiconductor layer through which the light received by the sensor from the exterior is intended to enter, light-reflecting means arranged in the dielectric layer, opposite the photodiodes, and capable of reflecting at least a portion of the light received by the sensor towards the photodiodes, wherein the light-reflecting means comprise at least one layer containing at least one light-reflecting material, the principal faces of which are substantially parallel to the first face of the semiconductor layer, which is arranged between the interconnect layers and the semiconductor layer and through which electrical contacts pass, which connect the electrical interconnect layers to the CMOS photodiodes and/or transistors, and wherein the distance between the layer of light-reflecting material and the first face of the semiconductor layer is between approximately 70 nm and 120 nm.