an insulating board having a plurality of openings therethrough, with at least some of {HEAD ~ the openings} at {TAIL ~ positions} corresponding to the IC chip contact areas 
at
an insulating board having a plurality of openings therethrough , with at least some of { HEAD ~ the openings } at { TAIL ~ positions } corresponding to the IC chip contact areas
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH