Patent ID: 11901381
Assignee: STMICROELECTRONICS (CROLLES 2) SAS
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. An imaging pixel, comprising:
a doped photosensitive region of a first conductivity type in a semiconductor substrate;
a first charge collection region more heavily doped with the first conductivity type than the doped photosensitive region, the first charge collection region extending in the substrate from an upper surface of the substrate and being arranged above the doped photosensitive region;
a vertical stack that includes a vertical transfer gate and a vertical electric insulation wall, the stack crossing the substrate and being in contact with the first charge collection region, the vertical transfer gate being arranged at the upper surface of the substrate and penetrating into the substrate deeper than the first charge collection region, wherein the vertical transfer gate includes a gate electrode and a gate dielectric that are arranged on the vertical electric insulation wall;
a vertical electric insulation structure crossing said substrate and dividing the doped photosensitive region in first and second halves; and
a second charge collection region more heavily doped with the first conductivity type than the doped photosensitive region, extending in the substrate from the upper surface, the first and second charge collection regions of the pixel being arranged respectively above the first and second halves of the doped photosensitive region.