Patent ID: 8860099

Claim:
A solid-state imaging device, comprising: a first-conductivity-type semiconductor well region which in plan view has a pixel region and a transistor region; a plurality of pixels in the pixel region, each pixel having a photoelectric conversion portion and a first transistor within the pixel region, the pixels having pixel transistors within the transistor region, a set of the plurality of pixels being organized as a sharing pixel comprising a plurality of photoelectric conversion portions and a common pixel transistor that is shared by the set of the plurality of pixels; a first element isolation region between the plurality of pixels in the pixel region; a second element isolation region between desired pixel transistors in the transistor region of the first-conductivity type semiconductor well region, a sub-region of the second element isolation region having no insulating film and providing access to a region of the semiconductor well region, the sub-region being of the first-conductivity type and positioned within a region of the transistor region where the common pixel transistor is shared by the set of pixels; and an interlayer insulation film having a conductive via and a wiring layer therein, the conductive via being between the desired pixel transistors in the transistor region and providing an electrical connection between the wiring layer and the region of the semiconductor well region, wherein, the sub-region is a well contact portion via which a fixed voltage can be applied to the semiconductor well region, and the set of the plurality of pixels includes an impurity diffusion region at least in a region positioned below the well contact portion and between adjacent photoelectric conversion portions.