Insulating {TAIL ~ single or double layer} 404 is then etched to expose {HEAD ~ contact areas} 408, leaving the structure of FIG 4D 
Insulating { TAIL ~ single or double layer } 404 is then etched to expose { HEAD ~ contact areas } 408 , leaving the structure of FIG 4D
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH