The deposition means has a body communicating with the supply of material and a valve means responsive to the control selectively delivers {HEAD ~ droplets} to {TAIL ~ the substrate} 
to
The deposition means has a body communicating with the supply of material and a valve means responsive to the control selectively delivers { HEAD ~ droplets } to { TAIL ~ the substrate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL