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