Patent ID: 8890219

Claim:
An image sensor device, comprising: at least one transistor lying on a semiconductor-on-insulator substrate, the semiconductor-on-insulator substrate comprising: a semi-conducting layer, in which a channel area of the at least one transistor is disposed in a portion thereof, and an insulating layer separating the semi-conducting layer from a semi-conducting support layer, wherein the semi-conducting layer and the insulating layer extend beyond the channel area of the at least one transistor, and extend under at least a portion of a source region and at least a portion of a drain region of the at least one transistor, wherein the semi-conducting support layer comprises at least one photosensitive area including at least one P-doped region and at least one N-doped region forming a junction, the at least one photosensitive area being disposed facing the at least one transistor on a side of the channel area thereof and opposite a side of a gate electrode thereof, and wherein the insulating layer is configured to provide a capacitive coupling between the at least one photosensitive area and the semi-conducting layer.