{HEAD ~ The thin films} combine {TAIL ~ barrier and adhesion layer functions} with low dielectric constant functions, thus eliminating the necessity for separate adhesion and barrier layers, and layers of low dielectric constant 
combine
{ HEAD ~ The thin films } combine { TAIL ~ barrier and adhesion layer functions } with low dielectric constant functions , thus eliminating the necessity for separate adhesion and barrier layers , and layers of low dielectric constant
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH