A solid state image sensor including a pixel region having a plurality of {TAIL ~ pixels} includes {HEAD ~ at least a photodiode} and an amplifying portion amplifying photocharges outputted from the photodiode in the pixel region, and further includes a well electrode for taking well potential of a well region in which the amplifying portion is arranged 
A solid state image sensor including a pixel region having a plurality of { TAIL ~ pixels } includes { HEAD ~ at least a photodiode } and an amplifying portion amplifying photocharges outputted from the photodiode in the pixel region , and further includes a well electrode for taking well potential of a well region in which the amplifying portion is arranged
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