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