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