The resist is selectively removed to provide wells at {HEAD ~ the metalized pads} of {TAIL ~ the substrate} 
of
The resist is selectively removed to provide wells at { HEAD ~ the metalized pads } of { TAIL ~ the substrate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL