a plurality of photodiodes integrated in said substrate, each of {HEAD ~ said photodiodes} having {TAIL ~ a light sensitive region} completely disposed only at said surface 
having
a plurality of photodiodes integrated in said substrate , each of { HEAD ~ said photodiodes } having { TAIL ~ a light sensitive region } completely disposed only at said surface
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 TAIL OTH OTH OTH OTH OTH OTH