In yet another aspect of the invention, a method comprises forming a first macro having a metal wiring layer on a first level electrically connected to a metal wiring layer on a second layer and a capping layer over the metal wiring layer on {HEAD ~ the second layer} which has {TAIL ~ a first electromigration resistance} 
In yet another aspect of the invention , a method comprises forming a first macro having a metal wiring layer on a first level electrically connected to a metal wiring layer on a second layer and a capping layer over the metal wiring layer on { HEAD ~ the second layer } which has { TAIL ~ a first electromigration resistance }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL