{TAIL ~ a wiring layer} provided on and in direct contact with {HEAD ~ the interlayer dielectric layer}, 
{ TAIL ~ a wiring layer } provided on and in direct contact with { HEAD ~ the interlayer dielectric layer } ,
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH