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