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