For conventional designs, these materials are usually rejected as unsuitable for use in {HEAD ~ multilayer boards} because of poor temperature, solderability or {TAIL ~ lamination performance} 
because of
For conventional designs , these materials are usually rejected as unsuitable for use in { HEAD ~ multilayer boards } because of poor temperature , solderability or { TAIL ~ lamination performance }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL