{HEAD ~ The spacers} bond {TAIL ~ the substrate} to the transparent counter substrate and maintain a prescribed cell gap 
bond
{ HEAD ~ The spacers } bond { TAIL ~ the substrate } to the transparent counter substrate and maintain a prescribed cell gap
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH