{HEAD ~ means} for applying such a potential to {TAIL ~ all} of said plurality of electrodes that surface areas beneath said electrodes each become an accumulation state to thereby inject all of charge into said substrate; and 
{ HEAD ~ means } for applying such a potential to { TAIL ~ all } of said plurality of electrodes that surface areas beneath said electrodes each become an accumulation state to thereby inject all of charge into said substrate ; and
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL 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 OTH OTH