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