This invention is related to chemical compositions and {HEAD ~ methods} for preparing {TAIL ~ materials} that have low dielectric constants LKD 
for preparing
This invention is related to chemical compositions and { HEAD ~ methods } for preparing { TAIL ~ materials } that have low dielectric constants LKD
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH