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