Moreover, on {TAIL ~ the surface} of a first semiconductor region in which the photodiode stores the charges, {HEAD ~ a second semiconductor layer} of a conductivity type reverse to that of the first semiconductor region is arranged 
Moreover , on { TAIL ~ the surface } of a first semiconductor region in which the photodiode stores the charges , { HEAD ~ a second semiconductor layer } of a conductivity type reverse to that of the first semiconductor region is arranged
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH