{HEAD ~ at least one conductive plug} formed in the second dielectric layer and electrically connecting {TAIL ~ the third conductive layer} to the first conductive layer 
{ HEAD ~ at least one conductive plug } formed in the second dielectric layer and electrically connecting { TAIL ~ the third conductive layer } to the first conductive layer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH