{TAIL ~ A trench} may be formed in the metal layer to create sections in the metal layer, and a portion of {HEAD ~ the trench} may include an insulator 
{ TAIL ~ A trench } may be formed in the metal layer to create sections in the metal layer , and a portion of { HEAD ~ the trench } may include an insulator
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH