The IC chip is mounted in {HEAD ~ a recessed area} of {TAIL ~ a housing}, which serves as a heat sink and a hermetic seal for the IC chip 
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The IC chip is mounted in { HEAD ~ a recessed area } of { TAIL ~ a housing } , which serves as a heat sink and a hermetic seal for the IC chip
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH