The vapor sources 1a to 1f are shown in phantom because, as described above and below, they are zones on {TAIL ~ the surface} of {HEAD ~ a rectangular, open topped vaporizer crucible} 2 holding molten evaporation material 3 shown from the bottom, through the crucible 2 
The vapor sources 1a to 1f are shown in phantom because , as described above and below , they are zones on { TAIL ~ the surface } of { HEAD ~ a rectangular , open topped vaporizer crucible } 2 holding molten evaporation material 3 shown from the bottom , through the crucible 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH