Therefore, even if the conductive film 9 does not exist, electron can be emitted from {HEAD ~ tip} 6 by applying {TAIL ~ appropriate voltage} between the substrates 1 and 7 
by applying
Therefore , even if the conductive film 9 does not exist , electron can be emitted from { HEAD ~ tip } 6 by applying { TAIL ~ appropriate voltage } between the substrates 1 and 7
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH