Patent ID: 11942492
Assignee: SK HYNIX INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An image sensing device comprising:
a substrate including a first region and a second region adjacent to the first region;
a photoelectric conversion region formed in the substrate corresponding to the first region and including one or more demodulation nodes structured to receive a demodulation control signal and create an electric field and one or more detection nodes structured to collect photo generated charge carriers;
a circuit region including circuitry formed on the substrate corresponding to the second region to process the photo generated charge carriers collected by the one or more detection nodes;
a first well region doped with a first impurity and formed under the circuitry in the substrate corresponding to the second region to have a first width and a first depth; and
a second well region doped with a second impurity formed under the first well region in the substrate corresponding to the second region to have a second width and a second depth from a bottom surface of the first well region.