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