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