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