A second laminate comprises {HEAD ~ second interlayer dielectric films} having a mechanical strength higher than {TAIL ~ the first mechanical strength} 
A second laminate comprises { HEAD ~ second interlayer dielectric films } having a mechanical strength higher than { TAIL ~ the first mechanical strength }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL