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