{HEAD ~ Current} is forced through the channel that exceeds {TAIL ~ a current density} of 105 A/cm2 
{ HEAD ~ Current } is forced through the channel that exceeds { TAIL ~ a current density } of 105 A / cm2
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH