{HEAD ~ The chamber depth} is defined by {TAIL ~ the thickness} of the photoimagable polymer, typically 14 or 19 μm 
is defined by
{ HEAD ~ The chamber depth } is defined by { TAIL ~ the thickness } of the photoimagable polymer , typically 14 or 19 μm
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH