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