Alternatively, {HEAD ~ the spacers} are formed in light shielding regions of {TAIL ~ the pixel array} in a width smaller than the width of the light shielding regions 
Alternatively , { HEAD ~ the spacers } are formed in light shielding regions of { TAIL ~ the pixel array } in a width smaller than the width of the light shielding regions
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH