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