The present system defines a different way of making and operating {HEAD ~ a variation} on {TAIL ~ a pinned photodiode} 
on
The present system defines a different way of making and operating { HEAD ~ a variation } on { TAIL ~ a pinned photodiode }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL