In {HEAD ~ prior art methods}, such resistances may ruin the favorable influence of the high conductivity of copper or {TAIL ~ silver} 
In { HEAD ~ prior art methods } , such resistances may ruin the favorable influence of the high conductivity of copper or { TAIL ~ silver }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL